./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c --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/weaver/chl-nzb-file-symm.wvr.c -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 b869eaba59e8dca8d7cb2d1135193e506b8377811cada7a7f67b6d0824dd2d3d --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 05:11:17,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 05:11:17,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 05:11:17,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 05:11:17,751 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 05:11:17,754 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 05:11:17,756 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 05:11:17,759 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 05:11:17,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 05:11:17,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 05:11:17,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 05:11:17,768 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 05:11:17,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 05:11:17,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 05:11:17,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 05:11:17,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 05:11:17,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 05:11:17,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 05:11:17,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 05:11:17,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 05:11:17,785 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 05:11:17,786 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 05:11:17,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 05:11:17,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 05:11:17,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 05:11:17,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 05:11:17,795 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 05:11:17,797 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 05:11:17,798 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 05:11:17,798 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 05:11:17,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 05:11:17,800 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 05:11:17,803 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 05:11:17,803 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 05:11:17,805 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 05:11:17,805 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 05:11:17,805 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 05:11:17,806 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 05:11:17,806 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 05:11:17,807 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 05:11:17,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 05:11:17,809 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 05:11:17,845 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 05:11:17,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 05:11:17,846 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 05:11:17,846 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 05:11:17,847 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 05:11:17,848 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 05:11:17,848 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 05:11:17,848 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 05:11:17,849 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 05:11:17,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 05:11:17,850 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 05:11:17,850 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 05:11:17,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 05:11:17,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 05:11:17,851 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 05:11:17,851 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 05:11:17,851 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 05:11:17,851 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 05:11:17,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 05:11:17,852 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 05:11:17,852 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 05:11:17,852 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 05:11:17,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 05:11:17,852 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 05:11:17,853 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 05:11:17,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:11:17,853 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 05:11:17,853 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 05:11:17,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 05:11:17,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 05:11:17,854 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 05:11:17,854 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 05:11:17,854 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 05:11:17,855 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 05:11:17,855 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b869eaba59e8dca8d7cb2d1135193e506b8377811cada7a7f67b6d0824dd2d3d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 05:11:18,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 05:11:18,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 05:11:18,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 05:11:18,234 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 05:11:18,234 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 05:11:18,236 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c [2023-08-30 05:11:19,546 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 05:11:19,775 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 05:11:19,776 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c [2023-08-30 05:11:19,783 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ecc9029b/c50b86e147ee4402ba81ef7980e6635b/FLAGaa42285c5 [2023-08-30 05:11:19,799 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ecc9029b/c50b86e147ee4402ba81ef7980e6635b [2023-08-30 05:11:19,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 05:11:19,803 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 05:11:19,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 05:11:19,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 05:11:19,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 05:11:19,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:11:19" (1/1) ... [2023-08-30 05:11:19,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f786218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:19, skipping insertion in model container [2023-08-30 05:11:19,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:11:19" (1/1) ... [2023-08-30 05:11:19,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 05:11:19,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:11:19,996 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c[4929,4942] [2023-08-30 05:11:20,006 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:11:20,022 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 05:11:20,088 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c[4929,4942] [2023-08-30 05:11:20,092 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:11:20,121 INFO L208 MainTranslator]: Completed translation [2023-08-30 05:11:20,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:20 WrapperNode [2023-08-30 05:11:20,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 05:11:20,124 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 05:11:20,125 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 05:11:20,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 05:11:20,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:20" (1/1) ... [2023-08-30 05:11:20,158 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:20" (1/1) ... [2023-08-30 05:11:20,206 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 21, calls inlined = 29, statements flattened = 406 [2023-08-30 05:11:20,213 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 05:11:20,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 05:11:20,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 05:11:20,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 05:11:20,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:20" (1/1) ... [2023-08-30 05:11:20,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:20" (1/1) ... [2023-08-30 05:11:20,236 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:20" (1/1) ... [2023-08-30 05:11:20,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:20" (1/1) ... [2023-08-30 05:11:20,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:20" (1/1) ... [2023-08-30 05:11:20,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:20" (1/1) ... [2023-08-30 05:11:20,270 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:20" (1/1) ... [2023-08-30 05:11:20,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:20" (1/1) ... [2023-08-30 05:11:20,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 05:11:20,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 05:11:20,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 05:11:20,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 05:11:20,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:20" (1/1) ... [2023-08-30 05:11:20,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:11:20,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:11:20,378 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 05:11:20,408 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 05:11:20,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 05:11:20,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 05:11:20,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 05:11:20,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 05:11:20,422 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 05:11:20,422 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 05:11:20,422 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 05:11:20,423 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 05:11:20,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 05:11:20,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 05:11:20,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 05:11:20,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 05:11:20,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 05:11:20,425 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 05:11:20,568 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 05:11:20,570 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 05:11:21,276 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 05:11:21,296 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 05:11:21,296 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 05:11:21,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:11:21 BoogieIcfgContainer [2023-08-30 05:11:21,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 05:11:21,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 05:11:21,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 05:11:21,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 05:11:21,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:11:19" (1/3) ... [2023-08-30 05:11:21,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f0a588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:11:21, skipping insertion in model container [2023-08-30 05:11:21,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:20" (2/3) ... [2023-08-30 05:11:21,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f0a588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:11:21, skipping insertion in model container [2023-08-30 05:11:21,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:11:21" (3/3) ... [2023-08-30 05:11:21,310 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2023-08-30 05:11:21,326 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 05:11:21,326 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2023-08-30 05:11:21,326 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 05:11:21,502 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 05:11:21,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 491 places, 533 transitions, 1082 flow [2023-08-30 05:11:21,803 INFO L130 PetriNetUnfolder]: 49/531 cut-off events. [2023-08-30 05:11:21,803 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 05:11:21,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 531 events. 49/531 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1665 event pairs, 0 based on Foata normal form. 0/436 useless extension candidates. Maximal degree in co-relation 359. Up to 2 conditions per place. [2023-08-30 05:11:21,819 INFO L82 GeneralOperation]: Start removeDead. Operand has 491 places, 533 transitions, 1082 flow [2023-08-30 05:11:21,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 485 places, 527 transitions, 1066 flow [2023-08-30 05:11:21,837 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 05:11:21,853 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 485 places, 527 transitions, 1066 flow [2023-08-30 05:11:21,859 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 485 places, 527 transitions, 1066 flow [2023-08-30 05:11:21,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 485 places, 527 transitions, 1066 flow [2023-08-30 05:11:21,970 INFO L130 PetriNetUnfolder]: 49/527 cut-off events. [2023-08-30 05:11:21,971 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 05:11:21,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536 conditions, 527 events. 49/527 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1661 event pairs, 0 based on Foata normal form. 0/433 useless extension candidates. Maximal degree in co-relation 359. Up to 2 conditions per place. [2023-08-30 05:11:22,008 INFO L119 LiptonReduction]: Number of co-enabled transitions 67080 [2023-08-30 05:11:46,297 INFO L134 LiptonReduction]: Checked pairs total: 72933 [2023-08-30 05:11:46,298 INFO L136 LiptonReduction]: Total number of compositions: 708 [2023-08-30 05:11:46,313 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 05:11:46,319 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;@35a5484c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 05:11:46,320 INFO L358 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2023-08-30 05:11:46,322 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 05:11:46,323 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 05:11:46,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:11:46,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:11:46,324 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:11:46,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:11:46,329 INFO L85 PathProgramCache]: Analyzing trace with hash 75103, now seen corresponding path program 1 times [2023-08-30 05:11:46,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:11:46,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184861045] [2023-08-30 05:11:46,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:11:46,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:11:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:11:46,729 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 05:11:46,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:11:46,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184861045] [2023-08-30 05:11:46,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184861045] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:11:46,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:11:46,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:11:46,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009867020] [2023-08-30 05:11:46,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:11:46,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:11:46,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:11:46,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:11:46,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:11:46,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 489 out of 1241 [2023-08-30 05:11:46,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 489.6666666666667) internal successors, (1469), 3 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states 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 05:11:46,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:11:46,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 489 of 1241 [2023-08-30 05:11:46,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:11:47,621 INFO L130 PetriNetUnfolder]: 1907/2918 cut-off events. [2023-08-30 05:11:47,622 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-08-30 05:11:47,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5900 conditions, 2918 events. 1907/2918 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 14855 event pairs, 1505 based on Foata normal form. 0/850 useless extension candidates. Maximal degree in co-relation 5696. Up to 2915 conditions per place. [2023-08-30 05:11:47,638 INFO L137 encePairwiseOnDemand]: 1219/1241 looper letters, 63 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2023-08-30 05:11:47,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 67 transitions, 280 flow [2023-08-30 05:11:47,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:11:47,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:11:47,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1553 transitions. [2023-08-30 05:11:47,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4171367177007789 [2023-08-30 05:11:47,662 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1553 transitions. [2023-08-30 05:11:47,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1553 transitions. [2023-08-30 05:11:47,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:11:47,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1553 transitions. [2023-08-30 05:11:47,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 517.6666666666666) internal successors, (1553), 3 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states 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 05:11:47,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states 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 05:11:47,693 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states 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 05:11:47,695 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 164 flow. Second operand 3 states and 1553 transitions. [2023-08-30 05:11:47,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 67 transitions, 280 flow [2023-08-30 05:11:47,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 67 transitions, 272 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 05:11:47,704 INFO L231 Difference]: Finished difference. Result has 60 places, 65 transitions, 160 flow [2023-08-30 05:11:47,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=60, PETRI_TRANSITIONS=65} [2023-08-30 05:11:47,709 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -14 predicate places. [2023-08-30 05:11:47,710 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 65 transitions, 160 flow [2023-08-30 05:11:47,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 489.6666666666667) internal successors, (1469), 3 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states 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 05:11:47,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:11:47,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:11:47,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 05:11:47,712 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:11:47,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:11:47,720 INFO L85 PathProgramCache]: Analyzing trace with hash 75102, now seen corresponding path program 1 times [2023-08-30 05:11:47,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:11:47,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219322384] [2023-08-30 05:11:47,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:11:47,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:11:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:11:47,796 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 05:11:47,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:11:47,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219322384] [2023-08-30 05:11:47,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219322384] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:11:47,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:11:47,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:11:47,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255864555] [2023-08-30 05:11:47,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:11:47,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:11:47,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:11:47,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:11:47,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:11:47,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 493 out of 1241 [2023-08-30 05:11:47,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 65 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 493.6666666666667) internal successors, (1481), 3 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states 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 05:11:47,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:11:47,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 493 of 1241 [2023-08-30 05:11:47,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:11:48,411 INFO L130 PetriNetUnfolder]: 1907/2914 cut-off events. [2023-08-30 05:11:48,412 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 05:11:48,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5870 conditions, 2914 events. 1907/2914 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 14821 event pairs, 1505 based on Foata normal form. 4/855 useless extension candidates. Maximal degree in co-relation 5846. Up to 2914 conditions per place. [2023-08-30 05:11:48,426 INFO L137 encePairwiseOnDemand]: 1238/1241 looper letters, 62 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2023-08-30 05:11:48,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 63 transitions, 282 flow [2023-08-30 05:11:48,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:11:48,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:11:48,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1542 transitions. [2023-08-30 05:11:48,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41418211120064463 [2023-08-30 05:11:48,431 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1542 transitions. [2023-08-30 05:11:48,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1542 transitions. [2023-08-30 05:11:48,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:11:48,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1542 transitions. [2023-08-30 05:11:48,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 514.0) internal successors, (1542), 3 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states 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 05:11:48,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states 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 05:11:48,444 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states 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 05:11:48,444 INFO L175 Difference]: Start difference. First operand has 60 places, 65 transitions, 160 flow. Second operand 3 states and 1542 transitions. [2023-08-30 05:11:48,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 63 transitions, 282 flow [2023-08-30 05:11:48,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 63 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:11:48,448 INFO L231 Difference]: Finished difference. Result has 59 places, 63 transitions, 154 flow [2023-08-30 05:11:48,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=59, PETRI_TRANSITIONS=63} [2023-08-30 05:11:48,449 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -15 predicate places. [2023-08-30 05:11:48,449 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 63 transitions, 154 flow [2023-08-30 05:11:48,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 493.6666666666667) internal successors, (1481), 3 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states 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 05:11:48,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:11:48,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 05:11:48,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 05:11:48,451 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:11:48,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:11:48,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2333825, now seen corresponding path program 1 times [2023-08-30 05:11:48,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:11:48,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116970492] [2023-08-30 05:11:48,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:11:48,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:11:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:11:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:11:48,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:11:48,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116970492] [2023-08-30 05:11:48,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116970492] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 05:11:48,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767424460] [2023-08-30 05:11:48,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:11:48,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:11:48,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:11:48,673 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 05:11:48,701 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 05:11:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:11:48,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 05:11:48,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:11:48,872 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 05:11:48,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 05:11:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:11:48,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:11:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:11:48,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767424460] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:11:48,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 05:11:48,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 05:11:48,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877190367] [2023-08-30 05:11:48,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 05:11:48,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 05:11:48,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:11:48,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 05:11:48,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-08-30 05:11:49,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 483 out of 1241 [2023-08-30 05:11:49,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 63 transitions, 154 flow. Second operand has 8 states, 8 states have (on average 484.125) internal successors, (3873), 8 states have internal predecessors, (3873), 0 states have call successors, (0), 0 states 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 05:11:49,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:11:49,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 483 of 1241 [2023-08-30 05:11:49,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:11:51,365 INFO L130 PetriNetUnfolder]: 5719/8734 cut-off events. [2023-08-30 05:11:51,365 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-30 05:11:51,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17573 conditions, 8734 events. 5719/8734 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 53141 event pairs, 4515 based on Foata normal form. 0/2546 useless extension candidates. Maximal degree in co-relation 17565. Up to 2913 conditions per place. [2023-08-30 05:11:51,426 INFO L137 encePairwiseOnDemand]: 1232/1241 looper letters, 169 selfloop transitions, 12 changer transitions 0/181 dead transitions. [2023-08-30 05:11:51,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 181 transitions, 788 flow [2023-08-30 05:11:51,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 05:11:51,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 05:11:51,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 3089 transitions. [2023-08-30 05:11:51,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148536126779479 [2023-08-30 05:11:51,435 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 3089 transitions. [2023-08-30 05:11:51,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 3089 transitions. [2023-08-30 05:11:51,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:11:51,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 3089 transitions. [2023-08-30 05:11:51,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 514.8333333333334) internal successors, (3089), 6 states have internal predecessors, (3089), 0 states have call successors, (0), 0 states 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 05:11:51,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1241.0) internal successors, (8687), 7 states have internal predecessors, (8687), 0 states have call successors, (0), 0 states 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 05:11:51,462 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1241.0) internal successors, (8687), 7 states have internal predecessors, (8687), 0 states have call successors, (0), 0 states 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 05:11:51,463 INFO L175 Difference]: Start difference. First operand has 59 places, 63 transitions, 154 flow. Second operand 6 states and 3089 transitions. [2023-08-30 05:11:51,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 181 transitions, 788 flow [2023-08-30 05:11:51,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 181 transitions, 787 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:11:51,467 INFO L231 Difference]: Finished difference. Result has 66 places, 71 transitions, 245 flow [2023-08-30 05:11:51,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=245, PETRI_PLACES=66, PETRI_TRANSITIONS=71} [2023-08-30 05:11:51,468 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -8 predicate places. [2023-08-30 05:11:51,469 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 71 transitions, 245 flow [2023-08-30 05:11:51,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 484.125) internal successors, (3873), 8 states have internal predecessors, (3873), 0 states have call successors, (0), 0 states 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 05:11:51,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:11:51,471 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 05:11:51,476 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 05:11:51,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:11:51,676 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:11:51,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:11:51,677 INFO L85 PathProgramCache]: Analyzing trace with hash 813096415, now seen corresponding path program 2 times [2023-08-30 05:11:51,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:11:51,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504365479] [2023-08-30 05:11:51,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:11:51,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:11:51,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:11:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:11:52,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:11:52,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504365479] [2023-08-30 05:11:52,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504365479] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 05:11:52,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534039946] [2023-08-30 05:11:52,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:11:52,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:11:52,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:11:52,010 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 05:11:52,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 05:11:52,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:11:52,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:11:52,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 05:11:52,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:11:52,173 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 05:11:52,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 05:11:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:11:52,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:11:52,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534039946] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:11:52,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 05:11:52,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2023-08-30 05:11:52,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65483020] [2023-08-30 05:11:52,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:11:52,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 05:11:52,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:11:52,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 05:11:52,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-08-30 05:11:52,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 491 out of 1241 [2023-08-30 05:11:52,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 71 transitions, 245 flow. Second operand has 7 states, 7 states have (on average 491.85714285714283) internal successors, (3443), 7 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states 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 05:11:52,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:11:52,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 491 of 1241 [2023-08-30 05:11:52,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:11:54,204 INFO L130 PetriNetUnfolder]: 5719/8732 cut-off events. [2023-08-30 05:11:54,205 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-30 05:11:54,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17601 conditions, 8732 events. 5719/8732 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 52249 event pairs, 4515 based on Foata normal form. 2/2552 useless extension candidates. Maximal degree in co-relation 17589. Up to 2910 conditions per place. [2023-08-30 05:11:54,250 INFO L137 encePairwiseOnDemand]: 1235/1241 looper letters, 167 selfloop transitions, 12 changer transitions 0/179 dead transitions. [2023-08-30 05:11:54,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 179 transitions, 835 flow [2023-08-30 05:11:54,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 05:11:54,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 05:11:54,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3618 transitions. [2023-08-30 05:11:54,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41648440197997005 [2023-08-30 05:11:54,261 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3618 transitions. [2023-08-30 05:11:54,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3618 transitions. [2023-08-30 05:11:54,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:11:54,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3618 transitions. [2023-08-30 05:11:54,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 516.8571428571429) internal successors, (3618), 7 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states 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 05:11:54,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1241.0) internal successors, (9928), 8 states have internal predecessors, (9928), 0 states have call successors, (0), 0 states 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 05:11:54,286 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1241.0) internal successors, (9928), 8 states have internal predecessors, (9928), 0 states have call successors, (0), 0 states 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 05:11:54,286 INFO L175 Difference]: Start difference. First operand has 66 places, 71 transitions, 245 flow. Second operand 7 states and 3618 transitions. [2023-08-30 05:11:54,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 179 transitions, 835 flow [2023-08-30 05:11:54,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 179 transitions, 815 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 05:11:54,295 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 229 flow [2023-08-30 05:11:54,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=229, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2023-08-30 05:11:54,297 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -7 predicate places. [2023-08-30 05:11:54,297 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 229 flow [2023-08-30 05:11:54,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 491.85714285714283) internal successors, (3443), 7 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states 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 05:11:54,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:11:54,299 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2023-08-30 05:11:54,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 05:11:54,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-30 05:11:54,505 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:11:54,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:11:54,505 INFO L85 PathProgramCache]: Analyzing trace with hash -558405069, now seen corresponding path program 1 times [2023-08-30 05:11:54,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:11:54,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739806786] [2023-08-30 05:11:54,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:11:54,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:11:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:11:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 05:11:54,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:11:54,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739806786] [2023-08-30 05:11:54,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739806786] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 05:11:54,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192305801] [2023-08-30 05:11:54,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:11:54,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:11:54,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:11:54,604 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 05:11:54,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 05:11:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:11:54,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 05:11:54,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:11:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 05:11:54,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:11:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 05:11:54,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192305801] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:11:54,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 05:11:54,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-30 05:11:54,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986103178] [2023-08-30 05:11:54,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 05:11:54,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 05:11:54,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:11:54,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 05:11:54,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2023-08-30 05:11:54,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 491 out of 1241 [2023-08-30 05:11:54,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 229 flow. Second operand has 11 states, 11 states have (on average 492.45454545454544) internal successors, (5417), 11 states have internal predecessors, (5417), 0 states have call successors, (0), 0 states 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 05:11:54,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:11:54,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 491 of 1241 [2023-08-30 05:11:54,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:11:55,386 INFO L130 PetriNetUnfolder]: 1907/2920 cut-off events. [2023-08-30 05:11:55,387 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 05:11:55,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5914 conditions, 2920 events. 1907/2920 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 14700 event pairs, 1505 based on Foata normal form. 4/864 useless extension candidates. Maximal degree in co-relation 5903. Up to 2911 conditions per place. [2023-08-30 05:11:55,399 INFO L137 encePairwiseOnDemand]: 1234/1241 looper letters, 57 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2023-08-30 05:11:55,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 69 transitions, 365 flow [2023-08-30 05:11:55,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 05:11:55,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 05:11:55,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3518 transitions. [2023-08-30 05:11:55,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40497294808334294 [2023-08-30 05:11:55,409 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3518 transitions. [2023-08-30 05:11:55,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3518 transitions. [2023-08-30 05:11:55,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:11:55,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3518 transitions. [2023-08-30 05:11:55,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 502.57142857142856) internal successors, (3518), 7 states have internal predecessors, (3518), 0 states have call successors, (0), 0 states 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 05:11:55,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1241.0) internal successors, (9928), 8 states have internal predecessors, (9928), 0 states have call successors, (0), 0 states 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 05:11:55,451 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1241.0) internal successors, (9928), 8 states have internal predecessors, (9928), 0 states have call successors, (0), 0 states 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 05:11:55,452 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 229 flow. Second operand 7 states and 3518 transitions. [2023-08-30 05:11:55,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 69 transitions, 365 flow [2023-08-30 05:11:55,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 69 transitions, 340 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-08-30 05:11:55,456 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 260 flow [2023-08-30 05:11:55,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=260, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2023-08-30 05:11:55,459 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2023-08-30 05:11:55,460 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 260 flow [2023-08-30 05:11:55,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 492.45454545454544) internal successors, (5417), 11 states have internal predecessors, (5417), 0 states have call successors, (0), 0 states 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 05:11:55,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:11:55,462 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1] [2023-08-30 05:11:55,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 05:11:55,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:11:55,667 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:11:55,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:11:55,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1873623345, now seen corresponding path program 2 times [2023-08-30 05:11:55,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:11:55,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791938324] [2023-08-30 05:11:55,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:11:55,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:11:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:11:55,967 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 05:11:55,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:11:55,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791938324] [2023-08-30 05:11:55,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791938324] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:11:55,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:11:55,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:11:55,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423386764] [2023-08-30 05:11:55,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:11:55,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:11:55,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:11:55,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:11:55,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:11:56,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 492 out of 1241 [2023-08-30 05:11:56,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 260 flow. Second operand has 4 states, 4 states have (on average 493.25) internal successors, (1973), 4 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states 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 05:11:56,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:11:56,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 492 of 1241 [2023-08-30 05:11:56,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:11:56,588 INFO L130 PetriNetUnfolder]: 1415/2211 cut-off events. [2023-08-30 05:11:56,588 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 05:11:56,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4511 conditions, 2211 events. 1415/2211 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 10864 event pairs, 1106 based on Foata normal form. 0/731 useless extension candidates. Maximal degree in co-relation 4497. Up to 2211 conditions per place. [2023-08-30 05:11:56,600 INFO L137 encePairwiseOnDemand]: 1238/1241 looper letters, 66 selfloop transitions, 1 changer transitions 0/67 dead transitions. [2023-08-30 05:11:56,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 67 transitions, 380 flow [2023-08-30 05:11:56,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:11:56,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:11:56,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1535 transitions. [2023-08-30 05:11:56,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41230190706419556 [2023-08-30 05:11:56,606 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1535 transitions. [2023-08-30 05:11:56,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1535 transitions. [2023-08-30 05:11:56,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:11:56,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1535 transitions. [2023-08-30 05:11:56,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 511.6666666666667) internal successors, (1535), 3 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states 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 05:11:56,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states 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 05:11:56,617 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states 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 05:11:56,618 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 260 flow. Second operand 3 states and 1535 transitions. [2023-08-30 05:11:56,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 67 transitions, 380 flow [2023-08-30 05:11:56,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 356 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-30 05:11:56,620 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 224 flow [2023-08-30 05:11:56,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2023-08-30 05:11:56,621 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -7 predicate places. [2023-08-30 05:11:56,621 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 224 flow [2023-08-30 05:11:56,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 493.25) internal successors, (1973), 4 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states 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 05:11:56,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:11:56,622 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1] [2023-08-30 05:11:56,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 05:11:56,623 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:11:56,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:11:56,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1873623343, now seen corresponding path program 1 times [2023-08-30 05:11:56,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:11:56,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713226817] [2023-08-30 05:11:56,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:11:56,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:11:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:11:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-30 05:11:56,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:11:56,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713226817] [2023-08-30 05:11:56,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713226817] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:11:56,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:11:56,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:11:56,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192601041] [2023-08-30 05:11:56,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:11:56,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:11:56,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:11:56,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:11:56,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:11:57,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 486 out of 1241 [2023-08-30 05:11:57,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 224 flow. Second operand has 5 states, 5 states have (on average 487.2) internal successors, (2436), 5 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:11:57,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:11:57,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 486 of 1241 [2023-08-30 05:11:57,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:11:57,356 INFO L130 PetriNetUnfolder]: 923/1502 cut-off events. [2023-08-30 05:11:57,356 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-30 05:11:57,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3078 conditions, 1502 events. 923/1502 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 7246 event pairs, 707 based on Foata normal form. 0/602 useless extension candidates. Maximal degree in co-relation 3063. Up to 1502 conditions per place. [2023-08-30 05:11:57,363 INFO L137 encePairwiseOnDemand]: 1238/1241 looper letters, 64 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-08-30 05:11:57,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 65 transitions, 340 flow [2023-08-30 05:11:57,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:11:57,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:11:57,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1515 transitions. [2023-08-30 05:11:57,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40692989524576956 [2023-08-30 05:11:57,369 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1515 transitions. [2023-08-30 05:11:57,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1515 transitions. [2023-08-30 05:11:57,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:11:57,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1515 transitions. [2023-08-30 05:11:57,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 505.0) internal successors, (1515), 3 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 05:11:57,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states 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 05:11:57,378 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states 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 05:11:57,379 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 224 flow. Second operand 3 states and 1515 transitions. [2023-08-30 05:11:57,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 65 transitions, 340 flow [2023-08-30 05:11:57,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 65 transitions, 339 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:11:57,381 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 211 flow [2023-08-30 05:11:57,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2023-08-30 05:11:57,382 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -8 predicate places. [2023-08-30 05:11:57,382 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 211 flow [2023-08-30 05:11:57,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 487.2) internal successors, (2436), 5 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:11:57,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:11:57,383 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2023-08-30 05:11:57,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 05:11:57,383 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:11:57,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:11:57,384 INFO L85 PathProgramCache]: Analyzing trace with hash 960788750, now seen corresponding path program 1 times [2023-08-30 05:11:57,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:11:57,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287822504] [2023-08-30 05:11:57,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:11:57,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:11:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:11:57,569 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 05:11:57,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:11:57,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287822504] [2023-08-30 05:11:57,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287822504] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:11:57,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:11:57,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:11:57,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853996055] [2023-08-30 05:11:57,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:11:57,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:11:57,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:11:57,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:11:57,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:11:57,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 492 out of 1241 [2023-08-30 05:11:57,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 211 flow. Second operand has 4 states, 4 states have (on average 493.75) internal successors, (1975), 4 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states 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 05:11:57,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:11:57,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 492 of 1241 [2023-08-30 05:11:57,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:11:58,015 INFO L130 PetriNetUnfolder]: 885/1431 cut-off events. [2023-08-30 05:11:58,016 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-30 05:11:58,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2937 conditions, 1431 events. 885/1431 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 6772 event pairs, 676 based on Foata normal form. 0/591 useless extension candidates. Maximal degree in co-relation 2921. Up to 1431 conditions per place. [2023-08-30 05:11:58,023 INFO L137 encePairwiseOnDemand]: 1238/1241 looper letters, 62 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2023-08-30 05:11:58,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 63 transitions, 333 flow [2023-08-30 05:11:58,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:11:58,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:11:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1531 transitions. [2023-08-30 05:11:58,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41122750470051034 [2023-08-30 05:11:58,029 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1531 transitions. [2023-08-30 05:11:58,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1531 transitions. [2023-08-30 05:11:58,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:11:58,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1531 transitions. [2023-08-30 05:11:58,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 510.3333333333333) internal successors, (1531), 3 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states 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 05:11:58,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states 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 05:11:58,038 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states 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 05:11:58,039 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 211 flow. Second operand 3 states and 1531 transitions. [2023-08-30 05:11:58,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 63 transitions, 333 flow [2023-08-30 05:11:58,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 63 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:11:58,041 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 208 flow [2023-08-30 05:11:58,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2023-08-30 05:11:58,042 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -9 predicate places. [2023-08-30 05:11:58,042 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 208 flow [2023-08-30 05:11:58,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 493.75) internal successors, (1975), 4 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states 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 05:11:58,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:11:58,043 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2023-08-30 05:11:58,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 05:11:58,043 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:11:58,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:11:58,043 INFO L85 PathProgramCache]: Analyzing trace with hash 960788749, now seen corresponding path program 1 times [2023-08-30 05:11:58,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:11:58,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563377233] [2023-08-30 05:11:58,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:11:58,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:11:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:11:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-30 05:11:58,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:11:58,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563377233] [2023-08-30 05:11:58,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563377233] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:11:58,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:11:58,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:11:58,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628679876] [2023-08-30 05:11:58,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:11:58,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:11:58,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:11:58,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:11:58,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:11:58,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 486 out of 1241 [2023-08-30 05:11:58,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 487.6) internal successors, (2438), 5 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states 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 05:11:58,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:11:58,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 486 of 1241 [2023-08-30 05:11:58,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:11:58,602 INFO L130 PetriNetUnfolder]: 847/1360 cut-off events. [2023-08-30 05:11:58,602 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-30 05:11:58,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2796 conditions, 1360 events. 847/1360 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 6339 event pairs, 645 based on Foata normal form. 0/580 useless extension candidates. Maximal degree in co-relation 2779. Up to 1360 conditions per place. [2023-08-30 05:11:58,609 INFO L137 encePairwiseOnDemand]: 1238/1241 looper letters, 60 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2023-08-30 05:11:58,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 61 transitions, 326 flow [2023-08-30 05:11:58,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:11:58,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:11:58,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1511 transitions. [2023-08-30 05:11:58,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40585549288208433 [2023-08-30 05:11:58,614 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1511 transitions. [2023-08-30 05:11:58,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1511 transitions. [2023-08-30 05:11:58,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:11:58,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1511 transitions. [2023-08-30 05:11:58,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 503.6666666666667) internal successors, (1511), 3 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states 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 05:11:58,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states 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 05:11:58,624 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states 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 05:11:58,624 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 208 flow. Second operand 3 states and 1511 transitions. [2023-08-30 05:11:58,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 61 transitions, 326 flow [2023-08-30 05:11:58,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 325 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:11:58,626 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 205 flow [2023-08-30 05:11:58,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2023-08-30 05:11:58,627 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -10 predicate places. [2023-08-30 05:11:58,627 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 205 flow [2023-08-30 05:11:58,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 487.6) internal successors, (2438), 5 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states 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 05:11:58,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:11:58,628 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-08-30 05:11:58,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 05:11:58,628 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:11:58,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:11:58,629 INFO L85 PathProgramCache]: Analyzing trace with hash -280315447, now seen corresponding path program 1 times [2023-08-30 05:11:58,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:11:58,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126508372] [2023-08-30 05:11:58,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:11:58,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:11:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:11:58,723 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-30 05:11:58,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:11:58,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126508372] [2023-08-30 05:11:58,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126508372] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:11:58,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:11:58,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:11:58,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716760522] [2023-08-30 05:11:58,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:11:58,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:11:58,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:11:58,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:11:58,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:11:58,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 475 out of 1241 [2023-08-30 05:11:58,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 477.0) internal successors, (2385), 5 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states 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 05:11:58,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:11:58,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 475 of 1241 [2023-08-30 05:11:58,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:11:59,140 INFO L130 PetriNetUnfolder]: 608/973 cut-off events. [2023-08-30 05:11:59,140 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-30 05:11:59,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2020 conditions, 973 events. 608/973 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4020 event pairs, 438 based on Foata normal form. 0/453 useless extension candidates. Maximal degree in co-relation 2002. Up to 966 conditions per place. [2023-08-30 05:11:59,145 INFO L137 encePairwiseOnDemand]: 1234/1241 looper letters, 54 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-08-30 05:11:59,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 56 transitions, 307 flow [2023-08-30 05:11:59,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:11:59,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:11:59,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1951 transitions. [2023-08-30 05:11:59,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3930298146655923 [2023-08-30 05:11:59,151 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1951 transitions. [2023-08-30 05:11:59,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1951 transitions. [2023-08-30 05:11:59,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:11:59,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1951 transitions. [2023-08-30 05:11:59,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 487.75) internal successors, (1951), 4 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states 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 05:11:59,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1241.0) internal successors, (6205), 5 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states 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 05:11:59,165 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1241.0) internal successors, (6205), 5 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states 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 05:11:59,165 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 205 flow. Second operand 4 states and 1951 transitions. [2023-08-30 05:11:59,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 56 transitions, 307 flow [2023-08-30 05:11:59,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 56 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:11:59,168 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 198 flow [2023-08-30 05:11:59,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2023-08-30 05:11:59,169 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -13 predicate places. [2023-08-30 05:11:59,169 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 198 flow [2023-08-30 05:11:59,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 477.0) internal successors, (2385), 5 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states 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 05:11:59,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:11:59,170 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-08-30 05:11:59,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 05:11:59,171 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:11:59,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:11:59,171 INFO L85 PathProgramCache]: Analyzing trace with hash -280315448, now seen corresponding path program 1 times [2023-08-30 05:11:59,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:11:59,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561728261] [2023-08-30 05:11:59,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:11:59,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:11:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:11:59,250 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-30 05:11:59,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:11:59,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561728261] [2023-08-30 05:11:59,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561728261] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:11:59,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:11:59,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:11:59,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024946721] [2023-08-30 05:11:59,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:11:59,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:11:59,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:11:59,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:11:59,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:11:59,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 475 out of 1241 [2023-08-30 05:11:59,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 198 flow. Second operand has 4 states, 4 states have (on average 477.25) internal successors, (1909), 4 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states 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 05:11:59,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:11:59,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 475 of 1241 [2023-08-30 05:11:59,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:11:59,582 INFO L130 PetriNetUnfolder]: 447/712 cut-off events. [2023-08-30 05:11:59,582 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-30 05:11:59,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1496 conditions, 712 events. 447/712 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2689 event pairs, 303 based on Foata normal form. 0/364 useless extension candidates. Maximal degree in co-relation 1477. Up to 698 conditions per place. [2023-08-30 05:11:59,585 INFO L137 encePairwiseOnDemand]: 1234/1241 looper letters, 49 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-30 05:11:59,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 51 transitions, 290 flow [2023-08-30 05:11:59,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:11:59,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:11:59,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1946 transitions. [2023-08-30 05:11:59,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920225624496374 [2023-08-30 05:11:59,591 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1946 transitions. [2023-08-30 05:11:59,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1946 transitions. [2023-08-30 05:11:59,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:11:59,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1946 transitions. [2023-08-30 05:11:59,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 486.5) internal successors, (1946), 4 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states 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 05:11:59,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1241.0) internal successors, (6205), 5 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states 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 05:11:59,602 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1241.0) internal successors, (6205), 5 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states 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 05:11:59,602 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 198 flow. Second operand 4 states and 1946 transitions. [2023-08-30 05:11:59,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 51 transitions, 290 flow [2023-08-30 05:11:59,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 51 transitions, 287 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:11:59,604 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 189 flow [2023-08-30 05:11:59,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2023-08-30 05:11:59,604 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -17 predicate places. [2023-08-30 05:11:59,605 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 189 flow [2023-08-30 05:11:59,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 477.25) internal successors, (1909), 4 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states 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 05:11:59,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:11:59,606 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-08-30 05:11:59,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 05:11:59,606 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:11:59,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:11:59,606 INFO L85 PathProgramCache]: Analyzing trace with hash -280315445, now seen corresponding path program 1 times [2023-08-30 05:11:59,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:11:59,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74268271] [2023-08-30 05:11:59,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:11:59,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:11:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:11:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-30 05:11:59,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:11:59,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74268271] [2023-08-30 05:11:59,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74268271] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 05:11:59,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074323996] [2023-08-30 05:11:59,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:11:59,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:11:59,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:11:59,833 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 05:11:59,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 05:11:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:11:59,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 05:11:59,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:12:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 05:12:00,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:12:00,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-08-30 05:12:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 05:12:00,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074323996] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:12:00,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 05:12:00,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2023-08-30 05:12:00,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981719553] [2023-08-30 05:12:00,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 05:12:00,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 05:12:00,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:12:00,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 05:12:00,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-08-30 05:12:01,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 471 out of 1241 [2023-08-30 05:12:01,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 189 flow. Second operand has 21 states, 21 states have (on average 472.3809523809524) internal successors, (9920), 21 states have internal predecessors, (9920), 0 states have call successors, (0), 0 states 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 05:12:01,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:12:01,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 471 of 1241 [2023-08-30 05:12:01,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:12:02,454 INFO L130 PetriNetUnfolder]: 1087/1716 cut-off events. [2023-08-30 05:12:02,454 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-30 05:12:02,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3529 conditions, 1716 events. 1087/1716 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6999 event pairs, 303 based on Foata normal form. 0/912 useless extension candidates. Maximal degree in co-relation 3510. Up to 656 conditions per place. [2023-08-30 05:12:02,465 INFO L137 encePairwiseOnDemand]: 1227/1241 looper letters, 92 selfloop transitions, 17 changer transitions 0/109 dead transitions. [2023-08-30 05:12:02,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 109 transitions, 529 flow [2023-08-30 05:12:02,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 05:12:02,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 05:12:02,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 4825 transitions. [2023-08-30 05:12:02,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3887993553585818 [2023-08-30 05:12:02,477 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 4825 transitions. [2023-08-30 05:12:02,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 4825 transitions. [2023-08-30 05:12:02,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:12:02,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 4825 transitions. [2023-08-30 05:12:02,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 482.5) internal successors, (4825), 10 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states 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 05:12:02,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 1241.0) internal successors, (13651), 11 states have internal predecessors, (13651), 0 states have call successors, (0), 0 states 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 05:12:02,503 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 1241.0) internal successors, (13651), 11 states have internal predecessors, (13651), 0 states have call successors, (0), 0 states 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 05:12:02,503 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 189 flow. Second operand 10 states and 4825 transitions. [2023-08-30 05:12:02,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 109 transitions, 529 flow [2023-08-30 05:12:02,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 109 transitions, 526 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:12:02,507 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 267 flow [2023-08-30 05:12:02,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=267, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2023-08-30 05:12:02,508 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -7 predicate places. [2023-08-30 05:12:02,508 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 267 flow [2023-08-30 05:12:02,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 472.3809523809524) internal successors, (9920), 21 states have internal predecessors, (9920), 0 states have call successors, (0), 0 states 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 05:12:02,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:12:02,511 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-08-30 05:12:02,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 05:12:02,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:12:02,717 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:12:02,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:12:02,717 INFO L85 PathProgramCache]: Analyzing trace with hash -280315446, now seen corresponding path program 1 times [2023-08-30 05:12:02,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:12:02,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765447904] [2023-08-30 05:12:02,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:02,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:12:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:02,963 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-30 05:12:02,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:12:02,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765447904] [2023-08-30 05:12:02,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765447904] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 05:12:02,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196169750] [2023-08-30 05:12:02,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:02,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:12:02,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:12:02,965 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 05:12:02,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 05:12:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:03,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 05:12:03,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:12:03,141 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 05:12:03,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 05:12:03,273 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-30 05:12:03,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:12:03,405 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 05:12:03,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:12:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 05:12:03,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196169750] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 05:12:03,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:12:03,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 8] total 21 [2023-08-30 05:12:03,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138068995] [2023-08-30 05:12:03,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:12:03,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 05:12:03,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:12:03,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 05:12:03,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2023-08-30 05:12:04,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 475 out of 1241 [2023-08-30 05:12:04,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 267 flow. Second operand has 10 states, 10 states have (on average 476.2) internal successors, (4762), 10 states have internal predecessors, (4762), 0 states have call successors, (0), 0 states 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 05:12:04,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:12:04,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 475 of 1241 [2023-08-30 05:12:04,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:12:04,939 INFO L130 PetriNetUnfolder]: 933/1464 cut-off events. [2023-08-30 05:12:04,940 INFO L131 PetriNetUnfolder]: For 178/178 co-relation queries the response was YES. [2023-08-30 05:12:04,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3409 conditions, 1464 events. 933/1464 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5891 event pairs, 133 based on Foata normal form. 0/898 useless extension candidates. Maximal degree in co-relation 3387. Up to 1126 conditions per place. [2023-08-30 05:12:04,947 INFO L137 encePairwiseOnDemand]: 1231/1241 looper letters, 62 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2023-08-30 05:12:04,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 71 transitions, 442 flow [2023-08-30 05:12:04,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:12:04,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:12:04,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2434 transitions. [2023-08-30 05:12:04,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3922643029814666 [2023-08-30 05:12:04,953 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2434 transitions. [2023-08-30 05:12:04,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2434 transitions. [2023-08-30 05:12:04,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:12:04,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2434 transitions. [2023-08-30 05:12:04,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 486.8) internal successors, (2434), 5 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states 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 05:12:04,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1241.0) internal successors, (7446), 6 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states 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 05:12:04,963 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1241.0) internal successors, (7446), 6 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states 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 05:12:04,963 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 267 flow. Second operand 5 states and 2434 transitions. [2023-08-30 05:12:04,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 71 transitions, 442 flow [2023-08-30 05:12:04,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 71 transitions, 404 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-08-30 05:12:04,967 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 268 flow [2023-08-30 05:12:04,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2023-08-30 05:12:04,968 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -12 predicate places. [2023-08-30 05:12:04,968 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 268 flow [2023-08-30 05:12:04,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 476.2) internal successors, (4762), 10 states have internal predecessors, (4762), 0 states have call successors, (0), 0 states 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 05:12:04,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:12:04,969 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:12:04,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 05:12:05,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 05:12:05,175 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:12:05,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:12:05,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1197156475, now seen corresponding path program 1 times [2023-08-30 05:12:05,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:12:05,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864974289] [2023-08-30 05:12:05,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:05,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:12:05,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:05,424 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-30 05:12:05,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:12:05,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864974289] [2023-08-30 05:12:05,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864974289] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 05:12:05,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941980808] [2023-08-30 05:12:05,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:05,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:12:05,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:12:05,426 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 05:12:05,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 05:12:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:05,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 05:12:05,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:12:05,618 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 05:12:05,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 05:12:05,647 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 05:12:05,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 05:12:05,795 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 05:12:05,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 05:12:05,810 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 05:12:05,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 05:12:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 05:12:05,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:12:06,347 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 05:12:06,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941980808] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 05:12:06,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:12:06,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 9] total 22 [2023-08-30 05:12:06,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681666456] [2023-08-30 05:12:06,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:12:06,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 05:12:06,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:12:06,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 05:12:06,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-08-30 05:12:07,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 1241 [2023-08-30 05:12:07,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 268 flow. Second operand has 10 states, 10 states have (on average 474.4) internal successors, (4744), 10 states have internal predecessors, (4744), 0 states have call successors, (0), 0 states 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 05:12:07,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:12:07,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 1241 [2023-08-30 05:12:07,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:12:08,021 INFO L130 PetriNetUnfolder]: 1317/2076 cut-off events. [2023-08-30 05:12:08,022 INFO L131 PetriNetUnfolder]: For 963/963 co-relation queries the response was YES. [2023-08-30 05:12:08,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5217 conditions, 2076 events. 1317/2076 cut-off events. For 963/963 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 9193 event pairs, 629 based on Foata normal form. 0/1378 useless extension candidates. Maximal degree in co-relation 5196. Up to 1457 conditions per place. [2023-08-30 05:12:08,030 INFO L137 encePairwiseOnDemand]: 1235/1241 looper letters, 86 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2023-08-30 05:12:08,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 90 transitions, 600 flow [2023-08-30 05:12:08,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:12:08,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:12:08,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2433 transitions. [2023-08-30 05:12:08,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39210314262691376 [2023-08-30 05:12:08,035 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2433 transitions. [2023-08-30 05:12:08,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2433 transitions. [2023-08-30 05:12:08,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:12:08,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2433 transitions. [2023-08-30 05:12:08,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 486.6) internal successors, (2433), 5 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states 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 05:12:08,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1241.0) internal successors, (7446), 6 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states 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 05:12:08,046 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1241.0) internal successors, (7446), 6 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states 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 05:12:08,046 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 268 flow. Second operand 5 states and 2433 transitions. [2023-08-30 05:12:08,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 90 transitions, 600 flow [2023-08-30 05:12:08,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 90 transitions, 579 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 05:12:08,050 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 274 flow [2023-08-30 05:12:08,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=274, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2023-08-30 05:12:08,051 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -10 predicate places. [2023-08-30 05:12:08,051 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 274 flow [2023-08-30 05:12:08,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 474.4) internal successors, (4744), 10 states have internal predecessors, (4744), 0 states have call successors, (0), 0 states 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 05:12:08,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:12:08,052 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:12:08,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 05:12:08,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:12:08,259 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:12:08,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:12:08,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1197156476, now seen corresponding path program 1 times [2023-08-30 05:12:08,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:12:08,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802643141] [2023-08-30 05:12:08,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:08,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:12:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 05:12:08,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:12:08,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802643141] [2023-08-30 05:12:08,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802643141] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 05:12:08,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890137557] [2023-08-30 05:12:08,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:08,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:12:08,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:12:08,597 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 05:12:08,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 05:12:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:08,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 05:12:08,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:12:08,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 05:12:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 05:12:08,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:12:09,088 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 05:12:09,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890137557] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 05:12:09,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:12:09,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2023-08-30 05:12:09,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714412977] [2023-08-30 05:12:09,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:12:09,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 05:12:09,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:12:09,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 05:12:09,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2023-08-30 05:12:09,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 475 out of 1241 [2023-08-30 05:12:09,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 274 flow. Second operand has 10 states, 10 states have (on average 476.4) internal successors, (4764), 10 states have internal predecessors, (4764), 0 states have call successors, (0), 0 states 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 05:12:09,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:12:09,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 475 of 1241 [2023-08-30 05:12:09,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:12:10,193 INFO L130 PetriNetUnfolder]: 1189/1874 cut-off events. [2023-08-30 05:12:10,193 INFO L131 PetriNetUnfolder]: For 1068/1068 co-relation queries the response was YES. [2023-08-30 05:12:10,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5035 conditions, 1874 events. 1189/1874 cut-off events. For 1068/1068 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 8072 event pairs, 417 based on Foata normal form. 0/1490 useless extension candidates. Maximal degree in co-relation 5013. Up to 1046 conditions per place. [2023-08-30 05:12:10,199 INFO L137 encePairwiseOnDemand]: 1234/1241 looper letters, 83 selfloop transitions, 6 changer transitions 0/89 dead transitions. [2023-08-30 05:12:10,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 89 transitions, 591 flow [2023-08-30 05:12:10,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:12:10,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:12:10,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2441 transitions. [2023-08-30 05:12:10,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.393392425463336 [2023-08-30 05:12:10,202 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2441 transitions. [2023-08-30 05:12:10,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2441 transitions. [2023-08-30 05:12:10,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:12:10,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2441 transitions. [2023-08-30 05:12:10,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 488.2) internal successors, (2441), 5 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states 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 05:12:10,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1241.0) internal successors, (7446), 6 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states 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 05:12:10,211 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1241.0) internal successors, (7446), 6 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states 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 05:12:10,212 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 274 flow. Second operand 5 states and 2441 transitions. [2023-08-30 05:12:10,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 89 transitions, 591 flow [2023-08-30 05:12:10,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 89 transitions, 585 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 05:12:10,216 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 286 flow [2023-08-30 05:12:10,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2023-08-30 05:12:10,216 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -8 predicate places. [2023-08-30 05:12:10,216 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 286 flow [2023-08-30 05:12:10,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 476.4) internal successors, (4764), 10 states have internal predecessors, (4764), 0 states have call successors, (0), 0 states 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 05:12:10,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:12:10,218 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:12:10,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 05:12:10,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:12:10,426 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:12:10,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:12:10,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1542850856, now seen corresponding path program 1 times [2023-08-30 05:12:10,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:12:10,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467669212] [2023-08-30 05:12:10,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:10,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:12:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:10,797 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-30 05:12:10,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:12:10,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467669212] [2023-08-30 05:12:10,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467669212] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 05:12:10,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193365821] [2023-08-30 05:12:10,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:10,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:12:10,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:12:10,799 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 05:12:10,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 05:12:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:10,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 05:12:10,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:12:10,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 05:12:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 05:12:11,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:12:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 05:12:11,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193365821] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:12:11,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 05:12:11,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 24 [2023-08-30 05:12:11,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362353078] [2023-08-30 05:12:11,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 05:12:11,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 05:12:11,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:12:11,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 05:12:11,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2023-08-30 05:12:13,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 469 out of 1241 [2023-08-30 05:12:13,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 286 flow. Second operand has 25 states, 25 states have (on average 470.52) internal successors, (11763), 25 states have internal predecessors, (11763), 0 states have call successors, (0), 0 states 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 05:12:13,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:12:13,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 469 of 1241 [2023-08-30 05:12:13,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:12:14,959 INFO L130 PetriNetUnfolder]: 2617/4060 cut-off events. [2023-08-30 05:12:14,959 INFO L131 PetriNetUnfolder]: For 3255/3255 co-relation queries the response was YES. [2023-08-30 05:12:14,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11728 conditions, 4060 events. 2617/4060 cut-off events. For 3255/3255 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 20276 event pairs, 417 based on Foata normal form. 222/3644 useless extension candidates. Maximal degree in co-relation 11705. Up to 1046 conditions per place. [2023-08-30 05:12:14,979 INFO L137 encePairwiseOnDemand]: 1231/1241 looper letters, 176 selfloop transitions, 18 changer transitions 0/194 dead transitions. [2023-08-30 05:12:14,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 194 transitions, 1284 flow [2023-08-30 05:12:14,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 05:12:14,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 05:12:14,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 5788 transitions. [2023-08-30 05:12:14,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38866505506312116 [2023-08-30 05:12:14,987 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 5788 transitions. [2023-08-30 05:12:14,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 5788 transitions. [2023-08-30 05:12:14,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:12:14,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 5788 transitions. [2023-08-30 05:12:14,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 482.3333333333333) internal successors, (5788), 12 states have internal predecessors, (5788), 0 states have call successors, (0), 0 states 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 05:12:15,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 1241.0) internal successors, (16133), 13 states have internal predecessors, (16133), 0 states have call successors, (0), 0 states 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 05:12:15,009 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 1241.0) internal successors, (16133), 13 states have internal predecessors, (16133), 0 states have call successors, (0), 0 states 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 05:12:15,009 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 286 flow. Second operand 12 states and 5788 transitions. [2023-08-30 05:12:15,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 194 transitions, 1284 flow [2023-08-30 05:12:15,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 194 transitions, 1271 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 05:12:15,016 INFO L231 Difference]: Finished difference. Result has 78 places, 62 transitions, 364 flow [2023-08-30 05:12:15,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=364, PETRI_PLACES=78, PETRI_TRANSITIONS=62} [2023-08-30 05:12:15,016 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2023-08-30 05:12:15,017 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 62 transitions, 364 flow [2023-08-30 05:12:15,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 470.52) internal successors, (11763), 25 states have internal predecessors, (11763), 0 states have call successors, (0), 0 states 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 05:12:15,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:12:15,019 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:12:15,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 05:12:15,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 05:12:15,225 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:12:15,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:12:15,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1542850857, now seen corresponding path program 1 times [2023-08-30 05:12:15,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:12:15,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24295680] [2023-08-30 05:12:15,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:15,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:12:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-30 05:12:15,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:12:15,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24295680] [2023-08-30 05:12:15,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24295680] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 05:12:15,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605779763] [2023-08-30 05:12:15,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:15,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:12:15,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:12:15,533 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 05:12:15,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 05:12:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:15,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 05:12:15,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:12:15,763 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 05:12:15,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 05:12:15,796 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 05:12:15,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 05:12:15,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:12:15,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 05:12:15,937 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 05:12:15,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 05:12:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 05:12:16,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:12:22,162 WARN L222 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:12:22,448 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 05:12:22,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605779763] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:12:22,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 05:12:22,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2023-08-30 05:12:22,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514981822] [2023-08-30 05:12:22,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 05:12:22,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 05:12:22,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:12:22,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 05:12:22,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2023-08-30 05:12:25,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 465 out of 1241 [2023-08-30 05:12:25,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 62 transitions, 364 flow. Second operand has 26 states, 26 states have (on average 466.65384615384613) internal successors, (12133), 26 states have internal predecessors, (12133), 0 states have call successors, (0), 0 states 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 05:12:25,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:12:25,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 465 of 1241 [2023-08-30 05:12:25,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:12:26,882 INFO L130 PetriNetUnfolder]: 1957/3104 cut-off events. [2023-08-30 05:12:26,882 INFO L131 PetriNetUnfolder]: For 4610/4610 co-relation queries the response was YES. [2023-08-30 05:12:26,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9642 conditions, 3104 events. 1957/3104 cut-off events. For 4610/4610 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 14961 event pairs, 629 based on Foata normal form. 222/2982 useless extension candidates. Maximal degree in co-relation 9615. Up to 1453 conditions per place. [2023-08-30 05:12:26,901 INFO L137 encePairwiseOnDemand]: 1233/1241 looper letters, 173 selfloop transitions, 15 changer transitions 0/188 dead transitions. [2023-08-30 05:12:26,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 188 transitions, 1280 flow [2023-08-30 05:12:26,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 05:12:26,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 05:12:26,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 7597 transitions. [2023-08-30 05:12:26,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3826047542304593 [2023-08-30 05:12:26,914 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 7597 transitions. [2023-08-30 05:12:26,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 7597 transitions. [2023-08-30 05:12:26,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:12:26,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 7597 transitions. [2023-08-30 05:12:26,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 474.8125) internal successors, (7597), 16 states have internal predecessors, (7597), 0 states have call successors, (0), 0 states 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 05:12:26,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 1241.0) internal successors, (21097), 17 states have internal predecessors, (21097), 0 states have call successors, (0), 0 states 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 05:12:26,940 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 1241.0) internal successors, (21097), 17 states have internal predecessors, (21097), 0 states have call successors, (0), 0 states 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 05:12:26,941 INFO L175 Difference]: Start difference. First operand has 78 places, 62 transitions, 364 flow. Second operand 16 states and 7597 transitions. [2023-08-30 05:12:26,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 188 transitions, 1280 flow [2023-08-30 05:12:26,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 188 transitions, 1233 flow, removed 6 selfloop flow, removed 10 redundant places. [2023-08-30 05:12:26,954 INFO L231 Difference]: Finished difference. Result has 83 places, 60 transitions, 331 flow [2023-08-30 05:12:26,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=331, PETRI_PLACES=83, PETRI_TRANSITIONS=60} [2023-08-30 05:12:26,955 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 9 predicate places. [2023-08-30 05:12:26,955 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 60 transitions, 331 flow [2023-08-30 05:12:26,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 466.65384615384613) internal successors, (12133), 26 states have internal predecessors, (12133), 0 states have call successors, (0), 0 states 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 05:12:26,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:12:26,957 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:12:26,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 05:12:27,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 05:12:27,163 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:12:27,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:12:27,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1882735610, now seen corresponding path program 1 times [2023-08-30 05:12:27,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:12:27,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682329522] [2023-08-30 05:12:27,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:27,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:12:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-30 05:12:27,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:12:27,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682329522] [2023-08-30 05:12:27,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682329522] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 05:12:27,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083080733] [2023-08-30 05:12:27,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:27,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:12:27,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:12:27,505 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 05:12:27,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 05:12:27,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:27,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 05:12:27,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:12:28,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2023-08-30 05:12:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 05:12:28,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:12:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 05:12:28,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083080733] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 05:12:28,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:12:28,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 7] total 16 [2023-08-30 05:12:28,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179515234] [2023-08-30 05:12:28,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:12:28,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:12:28,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:12:28,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:12:28,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-08-30 05:12:29,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 485 out of 1241 [2023-08-30 05:12:29,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 60 transitions, 331 flow. Second operand has 4 states, 4 states have (on average 488.25) internal successors, (1953), 4 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states 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 05:12:29,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:12:29,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 485 of 1241 [2023-08-30 05:12:29,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:12:30,008 INFO L130 PetriNetUnfolder]: 2187/3522 cut-off events. [2023-08-30 05:12:30,009 INFO L131 PetriNetUnfolder]: For 4160/4160 co-relation queries the response was YES. [2023-08-30 05:12:30,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10454 conditions, 3522 events. 2187/3522 cut-off events. For 4160/4160 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 17083 event pairs, 1257 based on Foata normal form. 150/3316 useless extension candidates. Maximal degree in co-relation 10429. Up to 2545 conditions per place. [2023-08-30 05:12:30,032 INFO L137 encePairwiseOnDemand]: 1235/1241 looper letters, 79 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-30 05:12:30,033 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 81 transitions, 598 flow [2023-08-30 05:12:30,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:12:30,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:12:30,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1514 transitions. [2023-08-30 05:12:30,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40666129465484824 [2023-08-30 05:12:30,037 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1514 transitions. [2023-08-30 05:12:30,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1514 transitions. [2023-08-30 05:12:30,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:12:30,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1514 transitions. [2023-08-30 05:12:30,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 504.6666666666667) internal successors, (1514), 3 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states 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 05:12:30,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states 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 05:12:30,043 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states 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 05:12:30,043 INFO L175 Difference]: Start difference. First operand has 83 places, 60 transitions, 331 flow. Second operand 3 states and 1514 transitions. [2023-08-30 05:12:30,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 81 transitions, 598 flow [2023-08-30 05:12:30,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 81 transitions, 540 flow, removed 8 selfloop flow, removed 10 redundant places. [2023-08-30 05:12:30,050 INFO L231 Difference]: Finished difference. Result has 77 places, 61 transitions, 305 flow [2023-08-30 05:12:30,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=305, PETRI_PLACES=77, PETRI_TRANSITIONS=61} [2023-08-30 05:12:30,051 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 3 predicate places. [2023-08-30 05:12:30,051 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 61 transitions, 305 flow [2023-08-30 05:12:30,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 488.25) internal successors, (1953), 4 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states 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 05:12:30,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:12:30,052 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:12:30,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 05:12:30,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 05:12:30,258 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:12:30,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:12:30,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1674174332, now seen corresponding path program 2 times [2023-08-30 05:12:30,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:12:30,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887654560] [2023-08-30 05:12:30,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:30,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:12:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 05:12:30,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:12:30,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887654560] [2023-08-30 05:12:30,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887654560] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 05:12:30,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454260017] [2023-08-30 05:12:30,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:12:30,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:12:30,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:12:30,993 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 05:12:31,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 05:12:31,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:12:31,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:12:31,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 05:12:31,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:12:31,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 05:12:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 05:12:31,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:12:31,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454260017] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:12:31,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 05:12:31,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2023-08-30 05:12:31,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951948683] [2023-08-30 05:12:31,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:12:31,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 05:12:31,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:12:31,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 05:12:31,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-08-30 05:12:31,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 481 out of 1241 [2023-08-30 05:12:31,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 61 transitions, 305 flow. Second operand has 9 states, 9 states have (on average 482.55555555555554) internal successors, (4343), 9 states have internal predecessors, (4343), 0 states have call successors, (0), 0 states 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 05:12:31,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:12:31,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 481 of 1241 [2023-08-30 05:12:31,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:12:32,749 INFO L130 PetriNetUnfolder]: 2101/3444 cut-off events. [2023-08-30 05:12:32,749 INFO L131 PetriNetUnfolder]: For 3422/3422 co-relation queries the response was YES. [2023-08-30 05:12:32,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9966 conditions, 3444 events. 2101/3444 cut-off events. For 3422/3422 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 17713 event pairs, 237 based on Foata normal form. 86/3264 useless extension candidates. Maximal degree in co-relation 9941. Up to 1010 conditions per place. [2023-08-30 05:12:32,767 INFO L137 encePairwiseOnDemand]: 1236/1241 looper letters, 217 selfloop transitions, 7 changer transitions 0/224 dead transitions. [2023-08-30 05:12:32,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 224 transitions, 1536 flow [2023-08-30 05:12:32,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 05:12:32,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 05:12:32,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4496 transitions. [2023-08-30 05:12:32,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025427522607216 [2023-08-30 05:12:32,771 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4496 transitions. [2023-08-30 05:12:32,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4496 transitions. [2023-08-30 05:12:32,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:12:32,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4496 transitions. [2023-08-30 05:12:32,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 499.55555555555554) internal successors, (4496), 9 states have internal predecessors, (4496), 0 states have call successors, (0), 0 states 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 05:12:32,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1241.0) internal successors, (12410), 10 states have internal predecessors, (12410), 0 states have call successors, (0), 0 states 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 05:12:32,784 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1241.0) internal successors, (12410), 10 states have internal predecessors, (12410), 0 states have call successors, (0), 0 states 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 05:12:32,784 INFO L175 Difference]: Start difference. First operand has 77 places, 61 transitions, 305 flow. Second operand 9 states and 4496 transitions. [2023-08-30 05:12:32,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 224 transitions, 1536 flow [2023-08-30 05:12:32,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 224 transitions, 1512 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 05:12:32,799 INFO L231 Difference]: Finished difference. Result has 79 places, 60 transitions, 295 flow [2023-08-30 05:12:32,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=295, PETRI_PLACES=79, PETRI_TRANSITIONS=60} [2023-08-30 05:12:32,800 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2023-08-30 05:12:32,800 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 60 transitions, 295 flow [2023-08-30 05:12:32,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 482.55555555555554) internal successors, (4343), 9 states have internal predecessors, (4343), 0 states have call successors, (0), 0 states 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 05:12:32,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:12:32,801 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:12:32,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 05:12:33,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:12:33,001 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:12:33,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:12:33,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1674174331, now seen corresponding path program 2 times [2023-08-30 05:12:33,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:12:33,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808431153] [2023-08-30 05:12:33,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:33,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:12:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-30 05:12:33,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:12:33,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808431153] [2023-08-30 05:12:33,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808431153] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 05:12:33,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790386199] [2023-08-30 05:12:33,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:12:33,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:12:33,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:12:33,645 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 05:12:33,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 05:12:33,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 05:12:33,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:12:33,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 05:12:33,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:12:33,886 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 05:12:33,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 05:12:33,915 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 05:12:33,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 05:12:33,991 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 05:12:33,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-08-30 05:12:34,005 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 05:12:34,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 05:12:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-08-30 05:12:34,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:12:34,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790386199] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:12:34,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 05:12:34,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 12 [2023-08-30 05:12:34,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121134278] [2023-08-30 05:12:34,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:12:34,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:12:34,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:12:34,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:12:34,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-08-30 05:12:34,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1241 [2023-08-30 05:12:34,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 60 transitions, 295 flow. Second operand has 5 states, 5 states have (on average 489.2) internal successors, (2446), 5 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states 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 05:12:34,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:12:34,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1241 [2023-08-30 05:12:34,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:12:35,127 INFO L130 PetriNetUnfolder]: 1815/2986 cut-off events. [2023-08-30 05:12:35,128 INFO L131 PetriNetUnfolder]: For 2041/2041 co-relation queries the response was YES. [2023-08-30 05:12:35,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8850 conditions, 2986 events. 1815/2986 cut-off events. For 2041/2041 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 14293 event pairs, 1467 based on Foata normal form. 0/2830 useless extension candidates. Maximal degree in co-relation 8828. Up to 2972 conditions per place. [2023-08-30 05:12:35,137 INFO L137 encePairwiseOnDemand]: 1236/1241 looper letters, 55 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-08-30 05:12:35,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 58 transitions, 405 flow [2023-08-30 05:12:35,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:12:35,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:12:35,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2473 transitions. [2023-08-30 05:12:35,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398549556809025 [2023-08-30 05:12:35,140 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2473 transitions. [2023-08-30 05:12:35,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2473 transitions. [2023-08-30 05:12:35,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:12:35,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2473 transitions. [2023-08-30 05:12:35,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 494.6) internal successors, (2473), 5 states have internal predecessors, (2473), 0 states have call successors, (0), 0 states 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 05:12:35,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1241.0) internal successors, (7446), 6 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states 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 05:12:35,149 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1241.0) internal successors, (7446), 6 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states 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 05:12:35,149 INFO L175 Difference]: Start difference. First operand has 79 places, 60 transitions, 295 flow. Second operand 5 states and 2473 transitions. [2023-08-30 05:12:35,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 58 transitions, 405 flow [2023-08-30 05:12:35,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 58 transitions, 392 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 05:12:35,154 INFO L231 Difference]: Finished difference. Result has 74 places, 58 transitions, 282 flow [2023-08-30 05:12:35,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=74, PETRI_TRANSITIONS=58} [2023-08-30 05:12:35,155 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2023-08-30 05:12:35,155 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 58 transitions, 282 flow [2023-08-30 05:12:35,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 489.2) internal successors, (2446), 5 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states 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 05:12:35,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:12:35,156 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:12:35,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 05:12:35,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:12:35,362 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:12:35,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:12:35,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1762652807, now seen corresponding path program 1 times [2023-08-30 05:12:35,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:12:35,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013281896] [2023-08-30 05:12:35,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:35,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:12:35,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:35,692 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-30 05:12:35,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:12:35,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013281896] [2023-08-30 05:12:35,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013281896] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 05:12:35,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637821742] [2023-08-30 05:12:35,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:35,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:12:35,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:12:35,694 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 05:12:35,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 05:12:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:35,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 05:12:35,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:12:35,943 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 05:12:35,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 05:12:35,968 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 05:12:35,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 05:12:36,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:12:36,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 05:12:36,105 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 05:12:36,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 05:12:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 05:12:36,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:12:36,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 179 [2023-08-30 05:12:36,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 177 [2023-08-30 05:12:42,697 WARN L222 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:12:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 05:12:43,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637821742] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:12:43,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 05:12:43,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2023-08-30 05:12:43,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554668141] [2023-08-30 05:12:43,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 05:12:43,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 05:12:43,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:12:43,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 05:12:43,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2023-08-30 05:12:47,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 460 out of 1241 [2023-08-30 05:12:47,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 58 transitions, 282 flow. Second operand has 27 states, 27 states have (on average 461.9259259259259) internal successors, (12472), 27 states have internal predecessors, (12472), 0 states have call successors, (0), 0 states 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 05:12:47,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:12:47,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 460 of 1241 [2023-08-30 05:12:47,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:12:48,963 INFO L130 PetriNetUnfolder]: 3237/5260 cut-off events. [2023-08-30 05:12:48,963 INFO L131 PetriNetUnfolder]: For 2427/2427 co-relation queries the response was YES. [2023-08-30 05:12:48,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15067 conditions, 5260 events. 3237/5260 cut-off events. For 2427/2427 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 26390 event pairs, 235 based on Foata normal form. 78/5052 useless extension candidates. Maximal degree in co-relation 15045. Up to 1612 conditions per place. [2023-08-30 05:12:48,990 INFO L137 encePairwiseOnDemand]: 1230/1241 looper letters, 154 selfloop transitions, 22 changer transitions 0/176 dead transitions. [2023-08-30 05:12:48,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 176 transitions, 1083 flow [2023-08-30 05:12:48,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 05:12:48,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 05:12:48,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 7963 transitions. [2023-08-30 05:12:48,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37744703038346683 [2023-08-30 05:12:48,999 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 7963 transitions. [2023-08-30 05:12:48,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 7963 transitions. [2023-08-30 05:12:49,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:12:49,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 7963 transitions. [2023-08-30 05:12:49,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 468.4117647058824) internal successors, (7963), 17 states have internal predecessors, (7963), 0 states have call successors, (0), 0 states 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 05:12:49,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 1241.0) internal successors, (22338), 18 states have internal predecessors, (22338), 0 states have call successors, (0), 0 states 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 05:12:49,024 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 1241.0) internal successors, (22338), 18 states have internal predecessors, (22338), 0 states have call successors, (0), 0 states 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 05:12:49,025 INFO L175 Difference]: Start difference. First operand has 74 places, 58 transitions, 282 flow. Second operand 17 states and 7963 transitions. [2023-08-30 05:12:49,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 176 transitions, 1083 flow [2023-08-30 05:12:49,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 176 transitions, 1078 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 05:12:49,031 INFO L231 Difference]: Finished difference. Result has 92 places, 66 transitions, 419 flow [2023-08-30 05:12:49,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=419, PETRI_PLACES=92, PETRI_TRANSITIONS=66} [2023-08-30 05:12:49,032 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 18 predicate places. [2023-08-30 05:12:49,032 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 66 transitions, 419 flow [2023-08-30 05:12:49,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 461.9259259259259) internal successors, (12472), 27 states have internal predecessors, (12472), 0 states have call successors, (0), 0 states 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 05:12:49,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:12:49,034 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:12:49,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 05:12:49,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-30 05:12:49,241 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:12:49,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:12:49,241 INFO L85 PathProgramCache]: Analyzing trace with hash 2057973880, now seen corresponding path program 1 times [2023-08-30 05:12:49,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:12:49,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666881958] [2023-08-30 05:12:49,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:49,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:12:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 05:12:49,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:12:49,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666881958] [2023-08-30 05:12:49,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666881958] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:12:49,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:12:49,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:12:49,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405536319] [2023-08-30 05:12:49,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:12:49,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:12:49,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:12:49,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:12:49,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:12:49,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 481 out of 1241 [2023-08-30 05:12:49,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 66 transitions, 419 flow. Second operand has 4 states, 4 states have (on average 484.75) internal successors, (1939), 4 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states 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 05:12:49,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:12:49,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 481 of 1241 [2023-08-30 05:12:49,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:12:51,032 INFO L130 PetriNetUnfolder]: 3236/5264 cut-off events. [2023-08-30 05:12:51,033 INFO L131 PetriNetUnfolder]: For 4028/4028 co-relation queries the response was YES. [2023-08-30 05:12:51,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16206 conditions, 5264 events. 3236/5264 cut-off events. For 4028/4028 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 26577 event pairs, 2533 based on Foata normal form. 1/4979 useless extension candidates. Maximal degree in co-relation 16179. Up to 5137 conditions per place. [2023-08-30 05:12:51,061 INFO L137 encePairwiseOnDemand]: 1238/1241 looper letters, 79 selfloop transitions, 1 changer transitions 5/85 dead transitions. [2023-08-30 05:12:51,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 85 transitions, 645 flow [2023-08-30 05:12:51,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:12:51,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:12:51,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1976 transitions. [2023-08-30 05:12:51,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3980660757453666 [2023-08-30 05:12:51,064 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1976 transitions. [2023-08-30 05:12:51,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1976 transitions. [2023-08-30 05:12:51,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:12:51,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1976 transitions. [2023-08-30 05:12:51,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 494.0) internal successors, (1976), 4 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states 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 05:12:51,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1241.0) internal successors, (6205), 5 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states 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 05:12:51,071 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1241.0) internal successors, (6205), 5 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states 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 05:12:51,071 INFO L175 Difference]: Start difference. First operand has 92 places, 66 transitions, 419 flow. Second operand 4 states and 1976 transitions. [2023-08-30 05:12:51,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 85 transitions, 645 flow [2023-08-30 05:12:51,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 85 transitions, 621 flow, removed 1 selfloop flow, removed 11 redundant places. [2023-08-30 05:12:51,086 INFO L231 Difference]: Finished difference. Result has 86 places, 66 transitions, 402 flow [2023-08-30 05:12:51,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=402, PETRI_PLACES=86, PETRI_TRANSITIONS=66} [2023-08-30 05:12:51,086 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 12 predicate places. [2023-08-30 05:12:51,087 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 66 transitions, 402 flow [2023-08-30 05:12:51,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 484.75) internal successors, (1939), 4 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states 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 05:12:51,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:12:51,087 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:12:51,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 05:12:51,088 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:12:51,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:12:51,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1400394772, now seen corresponding path program 2 times [2023-08-30 05:12:51,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:12:51,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161372706] [2023-08-30 05:12:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:51,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:12:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:51,692 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 05:12:51,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:12:51,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161372706] [2023-08-30 05:12:51,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161372706] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:12:51,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:12:51,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:12:51,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289486189] [2023-08-30 05:12:51,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:12:51,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:12:51,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:12:51,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:12:51,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:12:51,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 481 out of 1241 [2023-08-30 05:12:51,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 66 transitions, 402 flow. Second operand has 4 states, 4 states have (on average 484.75) internal successors, (1939), 4 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states 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 05:12:51,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:12:51,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 481 of 1241 [2023-08-30 05:12:51,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:12:52,802 INFO L130 PetriNetUnfolder]: 3233/5255 cut-off events. [2023-08-30 05:12:52,803 INFO L131 PetriNetUnfolder]: For 4437/4437 co-relation queries the response was YES. [2023-08-30 05:12:52,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16336 conditions, 5255 events. 3233/5255 cut-off events. For 4437/4437 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 27134 event pairs, 2374 based on Foata normal form. 1/4944 useless extension candidates. Maximal degree in co-relation 16308. Up to 4844 conditions per place. [2023-08-30 05:12:52,828 INFO L137 encePairwiseOnDemand]: 1238/1241 looper letters, 104 selfloop transitions, 1 changer transitions 5/110 dead transitions. [2023-08-30 05:12:52,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 110 transitions, 908 flow [2023-08-30 05:12:52,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:12:52,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:12:52,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1989 transitions. [2023-08-30 05:12:52,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4006849315068493 [2023-08-30 05:12:52,831 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1989 transitions. [2023-08-30 05:12:52,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1989 transitions. [2023-08-30 05:12:52,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:12:52,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1989 transitions. [2023-08-30 05:12:52,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 497.25) internal successors, (1989), 4 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states 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 05:12:52,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1241.0) internal successors, (6205), 5 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states 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 05:12:52,837 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1241.0) internal successors, (6205), 5 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states 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 05:12:52,838 INFO L175 Difference]: Start difference. First operand has 86 places, 66 transitions, 402 flow. Second operand 4 states and 1989 transitions. [2023-08-30 05:12:52,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 110 transitions, 908 flow [2023-08-30 05:12:52,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 110 transitions, 902 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 05:12:52,852 INFO L231 Difference]: Finished difference. Result has 88 places, 66 transitions, 406 flow [2023-08-30 05:12:52,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=406, PETRI_PLACES=88, PETRI_TRANSITIONS=66} [2023-08-30 05:12:52,853 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2023-08-30 05:12:52,853 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 66 transitions, 406 flow [2023-08-30 05:12:52,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 484.75) internal successors, (1939), 4 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states 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 05:12:52,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:12:52,854 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:12:52,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 05:12:52,854 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:12:52,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:12:52,855 INFO L85 PathProgramCache]: Analyzing trace with hash 738807776, now seen corresponding path program 1 times [2023-08-30 05:12:52,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:12:52,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566997173] [2023-08-30 05:12:52,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:52,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:12:52,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 05:12:52,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:12:52,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566997173] [2023-08-30 05:12:52,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566997173] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:12:52,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:12:52,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:12:52,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146237557] [2023-08-30 05:12:52,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:12:52,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:12:52,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:12:52,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:12:52,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:12:53,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 496 out of 1241 [2023-08-30 05:12:53,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 66 transitions, 406 flow. Second operand has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states 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 05:12:53,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:12:53,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 496 of 1241 [2023-08-30 05:12:53,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:12:54,008 INFO L130 PetriNetUnfolder]: 2977/4832 cut-off events. [2023-08-30 05:12:54,009 INFO L131 PetriNetUnfolder]: For 4794/4794 co-relation queries the response was YES. [2023-08-30 05:12:54,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15307 conditions, 4832 events. 2977/4832 cut-off events. For 4794/4794 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 24335 event pairs, 2152 based on Foata normal form. 150/4694 useless extension candidates. Maximal degree in co-relation 15278. Up to 4428 conditions per place. [2023-08-30 05:12:54,038 INFO L137 encePairwiseOnDemand]: 1238/1241 looper letters, 102 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2023-08-30 05:12:54,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 104 transitions, 884 flow [2023-08-30 05:12:54,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:12:54,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:12:54,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1548 transitions. [2023-08-30 05:12:54,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41579371474617244 [2023-08-30 05:12:54,040 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1548 transitions. [2023-08-30 05:12:54,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1548 transitions. [2023-08-30 05:12:54,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:12:54,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1548 transitions. [2023-08-30 05:12:54,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 516.0) internal successors, (1548), 3 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states 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 05:12:54,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states 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 05:12:54,044 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states 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 05:12:54,045 INFO L175 Difference]: Start difference. First operand has 88 places, 66 transitions, 406 flow. Second operand 3 states and 1548 transitions. [2023-08-30 05:12:54,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 104 transitions, 884 flow [2023-08-30 05:12:54,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 104 transitions, 879 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 05:12:54,058 INFO L231 Difference]: Finished difference. Result has 88 places, 66 transitions, 409 flow [2023-08-30 05:12:54,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=409, PETRI_PLACES=88, PETRI_TRANSITIONS=66} [2023-08-30 05:12:54,059 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2023-08-30 05:12:54,059 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 66 transitions, 409 flow [2023-08-30 05:12:54,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states 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 05:12:54,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:12:54,060 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:12:54,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-30 05:12:54,060 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:12:54,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:12:54,061 INFO L85 PathProgramCache]: Analyzing trace with hash 2041561843, now seen corresponding path program 1 times [2023-08-30 05:12:54,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:12:54,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546260670] [2023-08-30 05:12:54,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:54,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:12:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 05:12:54,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:12:54,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546260670] [2023-08-30 05:12:54,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546260670] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:12:54,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:12:54,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:12:54,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395923538] [2023-08-30 05:12:54,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:12:54,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:12:54,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:12:54,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:12:54,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:12:54,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 496 out of 1241 [2023-08-30 05:12:54,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 66 transitions, 409 flow. Second operand has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states 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 05:12:54,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:12:54,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 496 of 1241 [2023-08-30 05:12:54,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:12:55,148 INFO L130 PetriNetUnfolder]: 3014/4861 cut-off events. [2023-08-30 05:12:55,148 INFO L131 PetriNetUnfolder]: For 5400/5400 co-relation queries the response was YES. [2023-08-30 05:12:55,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16237 conditions, 4861 events. 3014/4861 cut-off events. For 5400/5400 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 23756 event pairs, 2184 based on Foata normal form. 24/4597 useless extension candidates. Maximal degree in co-relation 16208. Up to 4484 conditions per place. [2023-08-30 05:12:55,171 INFO L137 encePairwiseOnDemand]: 1236/1241 looper letters, 80 selfloop transitions, 4 changer transitions 0/84 dead transitions. [2023-08-30 05:12:55,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 84 transitions, 644 flow [2023-08-30 05:12:55,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:12:55,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:12:55,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1541 transitions. [2023-08-30 05:12:55,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41391351060972337 [2023-08-30 05:12:55,174 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1541 transitions. [2023-08-30 05:12:55,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1541 transitions. [2023-08-30 05:12:55,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:12:55,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1541 transitions. [2023-08-30 05:12:55,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 513.6666666666666) internal successors, (1541), 3 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states 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 05:12:55,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states 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 05:12:55,179 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states 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 05:12:55,179 INFO L175 Difference]: Start difference. First operand has 88 places, 66 transitions, 409 flow. Second operand 3 states and 1541 transitions. [2023-08-30 05:12:55,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 84 transitions, 644 flow [2023-08-30 05:12:55,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 636 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:12:55,190 INFO L231 Difference]: Finished difference. Result has 89 places, 69 transitions, 436 flow [2023-08-30 05:12:55,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=436, PETRI_PLACES=89, PETRI_TRANSITIONS=69} [2023-08-30 05:12:55,191 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 15 predicate places. [2023-08-30 05:12:55,191 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 69 transitions, 436 flow [2023-08-30 05:12:55,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states 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 05:12:55,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:12:55,192 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:12:55,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-30 05:12:55,192 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:12:55,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:12:55,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1157247728, now seen corresponding path program 1 times [2023-08-30 05:12:55,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:12:55,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949706925] [2023-08-30 05:12:55,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:55,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:12:55,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:55,436 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-08-30 05:12:55,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:12:55,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949706925] [2023-08-30 05:12:55,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949706925] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:12:55,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:12:55,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:12:55,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505822470] [2023-08-30 05:12:55,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:12:55,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:12:55,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:12:55,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:12:55,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:12:55,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 495 out of 1241 [2023-08-30 05:12:55,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 69 transitions, 436 flow. Second operand has 3 states, 3 states have (on average 500.6666666666667) internal successors, (1502), 3 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states 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 05:12:55,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:12:55,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 495 of 1241 [2023-08-30 05:12:55,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:12:56,478 INFO L130 PetriNetUnfolder]: 3008/4855 cut-off events. [2023-08-30 05:12:56,478 INFO L131 PetriNetUnfolder]: For 6087/6087 co-relation queries the response was YES. [2023-08-30 05:12:56,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16536 conditions, 4855 events. 3008/4855 cut-off events. For 6087/6087 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 24527 event pairs, 2121 based on Foata normal form. 6/4573 useless extension candidates. Maximal degree in co-relation 16506. Up to 4353 conditions per place. [2023-08-30 05:12:56,504 INFO L137 encePairwiseOnDemand]: 1237/1241 looper letters, 114 selfloop transitions, 2 changer transitions 2/118 dead transitions. [2023-08-30 05:12:56,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 118 transitions, 986 flow [2023-08-30 05:12:56,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:12:56,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:12:56,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1549 transitions. [2023-08-30 05:12:56,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41606231533709376 [2023-08-30 05:12:56,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1549 transitions. [2023-08-30 05:12:56,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1549 transitions. [2023-08-30 05:12:56,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:12:56,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1549 transitions. [2023-08-30 05:12:56,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 516.3333333333334) internal successors, (1549), 3 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states 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 05:12:56,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states 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 05:12:56,510 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states 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 05:12:56,510 INFO L175 Difference]: Start difference. First operand has 89 places, 69 transitions, 436 flow. Second operand 3 states and 1549 transitions. [2023-08-30 05:12:56,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 118 transitions, 986 flow [2023-08-30 05:12:56,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 118 transitions, 979 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:12:56,522 INFO L231 Difference]: Finished difference. Result has 91 places, 69 transitions, 442 flow [2023-08-30 05:12:56,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=442, PETRI_PLACES=91, PETRI_TRANSITIONS=69} [2023-08-30 05:12:56,522 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 17 predicate places. [2023-08-30 05:12:56,522 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 69 transitions, 442 flow [2023-08-30 05:12:56,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 500.6666666666667) internal successors, (1502), 3 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states 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 05:12:56,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:12:56,523 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:12:56,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-30 05:12:56,523 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:12:56,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:12:56,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1416703408, now seen corresponding path program 2 times [2023-08-30 05:12:56,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:12:56,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563448589] [2023-08-30 05:12:56,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:56,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:12:56,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-08-30 05:12:56,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:12:56,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563448589] [2023-08-30 05:12:56,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563448589] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:12:56,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:12:56,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:12:56,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355682421] [2023-08-30 05:12:56,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:12:56,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:12:56,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:12:56,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:12:56,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:12:56,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 497 out of 1241 [2023-08-30 05:12:56,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 69 transitions, 442 flow. Second operand has 3 states, 3 states have (on average 502.6666666666667) internal successors, (1508), 3 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states 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 05:12:56,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:12:56,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 497 of 1241 [2023-08-30 05:12:56,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:12:57,744 INFO L130 PetriNetUnfolder]: 2713/4364 cut-off events. [2023-08-30 05:12:57,745 INFO L131 PetriNetUnfolder]: For 6889/6889 co-relation queries the response was YES. [2023-08-30 05:12:57,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14915 conditions, 4364 events. 2713/4364 cut-off events. For 6889/6889 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 21192 event pairs, 1282 based on Foata normal form. 162/4262 useless extension candidates. Maximal degree in co-relation 14884. Up to 4333 conditions per place. [2023-08-30 05:12:57,764 INFO L137 encePairwiseOnDemand]: 1237/1241 looper letters, 70 selfloop transitions, 2 changer transitions 4/76 dead transitions. [2023-08-30 05:12:57,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 76 transitions, 629 flow [2023-08-30 05:12:57,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:12:57,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:12:57,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1536 transitions. [2023-08-30 05:12:57,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125705076551168 [2023-08-30 05:12:57,767 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1536 transitions. [2023-08-30 05:12:57,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1536 transitions. [2023-08-30 05:12:57,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:12:57,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1536 transitions. [2023-08-30 05:12:57,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 512.0) internal successors, (1536), 3 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states 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 05:12:57,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states 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 05:12:57,771 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states 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 05:12:57,771 INFO L175 Difference]: Start difference. First operand has 91 places, 69 transitions, 442 flow. Second operand 3 states and 1536 transitions. [2023-08-30 05:12:57,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 76 transitions, 629 flow [2023-08-30 05:12:57,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 76 transitions, 621 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 05:12:57,778 INFO L231 Difference]: Finished difference. Result has 91 places, 69 transitions, 457 flow [2023-08-30 05:12:57,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=457, PETRI_PLACES=91, PETRI_TRANSITIONS=69} [2023-08-30 05:12:57,779 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 17 predicate places. [2023-08-30 05:12:57,779 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 69 transitions, 457 flow [2023-08-30 05:12:57,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 502.6666666666667) internal successors, (1508), 3 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states 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 05:12:57,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:12:57,779 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 05:12:57,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-30 05:12:57,780 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:12:57,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:12:57,780 INFO L85 PathProgramCache]: Analyzing trace with hash 637856133, now seen corresponding path program 1 times [2023-08-30 05:12:57,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:12:57,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567383825] [2023-08-30 05:12:57,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:57,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:12:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 05:12:58,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:12:58,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567383825] [2023-08-30 05:12:58,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567383825] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 05:12:58,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349746607] [2023-08-30 05:12:58,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:58,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:12:58,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:12:58,309 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 05:12:58,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 05:12:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:58,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 05:12:58,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:12:59,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-08-30 05:12:59,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-08-30 05:12:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 05:12:59,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:12:59,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 178 [2023-08-30 05:12:59,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 176 [2023-08-30 05:12:59,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-08-30 05:12:59,826 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 05:12:59,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349746607] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:12:59,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 05:12:59,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 33 [2023-08-30 05:12:59,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530496308] [2023-08-30 05:12:59,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 05:12:59,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 05:12:59,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:12:59,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 05:12:59,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 05:13:02,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 470 out of 1241 [2023-08-30 05:13:02,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 69 transitions, 457 flow. Second operand has 34 states, 34 states have (on average 472.0) internal successors, (16048), 34 states have internal predecessors, (16048), 0 states have call successors, (0), 0 states 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 05:13:02,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:13:02,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 470 of 1241 [2023-08-30 05:13:02,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:13:04,476 INFO L130 PetriNetUnfolder]: 3533/5666 cut-off events. [2023-08-30 05:13:04,476 INFO L131 PetriNetUnfolder]: For 8282/8282 co-relation queries the response was YES. [2023-08-30 05:13:04,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19431 conditions, 5666 events. 3533/5666 cut-off events. For 8282/8282 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 26188 event pairs, 575 based on Foata normal form. 242/5556 useless extension candidates. Maximal degree in co-relation 19402. Up to 1196 conditions per place. [2023-08-30 05:13:04,514 INFO L137 encePairwiseOnDemand]: 1227/1241 looper letters, 186 selfloop transitions, 28 changer transitions 0/214 dead transitions. [2023-08-30 05:13:04,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 214 transitions, 1535 flow [2023-08-30 05:13:04,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 05:13:04,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 05:13:04,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 7224 transitions. [2023-08-30 05:13:04,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880741337630943 [2023-08-30 05:13:04,520 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 7224 transitions. [2023-08-30 05:13:04,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 7224 transitions. [2023-08-30 05:13:04,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:13:04,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 7224 transitions. [2023-08-30 05:13:04,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 481.6) internal successors, (7224), 15 states have internal predecessors, (7224), 0 states have call successors, (0), 0 states 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 05:13:04,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 1241.0) internal successors, (19856), 16 states have internal predecessors, (19856), 0 states have call successors, (0), 0 states 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 05:13:04,539 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 1241.0) internal successors, (19856), 16 states have internal predecessors, (19856), 0 states have call successors, (0), 0 states 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 05:13:04,539 INFO L175 Difference]: Start difference. First operand has 91 places, 69 transitions, 457 flow. Second operand 15 states and 7224 transitions. [2023-08-30 05:13:04,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 214 transitions, 1535 flow [2023-08-30 05:13:04,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 214 transitions, 1513 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-08-30 05:13:04,552 INFO L231 Difference]: Finished difference. Result has 106 places, 76 transitions, 623 flow [2023-08-30 05:13:04,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=623, PETRI_PLACES=106, PETRI_TRANSITIONS=76} [2023-08-30 05:13:04,553 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 32 predicate places. [2023-08-30 05:13:04,553 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 76 transitions, 623 flow [2023-08-30 05:13:04,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 472.0) internal successors, (16048), 34 states have internal predecessors, (16048), 0 states have call successors, (0), 0 states 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 05:13:04,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:13:04,555 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:13:04,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-30 05:13:04,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:13:04,756 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:13:04,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:13:04,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1725056729, now seen corresponding path program 1 times [2023-08-30 05:13:04,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:13:04,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784641421] [2023-08-30 05:13:04,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:13:04,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:13:04,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:13:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 05:13:05,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:13:05,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784641421] [2023-08-30 05:13:05,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784641421] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:13:05,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:13:05,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 05:13:05,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131416624] [2023-08-30 05:13:05,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:13:05,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:13:05,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:13:05,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:13:05,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:13:05,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 481 out of 1241 [2023-08-30 05:13:05,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 76 transitions, 623 flow. Second operand has 5 states, 5 states have (on average 485.6) internal successors, (2428), 5 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states 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 05:13:05,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:13:05,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 481 of 1241 [2023-08-30 05:13:05,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:13:07,091 INFO L130 PetriNetUnfolder]: 3806/6111 cut-off events. [2023-08-30 05:13:07,091 INFO L131 PetriNetUnfolder]: For 11988/11988 co-relation queries the response was YES. [2023-08-30 05:13:07,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22071 conditions, 6111 events. 3806/6111 cut-off events. For 11988/11988 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 29416 event pairs, 2414 based on Foata normal form. 22/5781 useless extension candidates. Maximal degree in co-relation 22036. Up to 5330 conditions per place. [2023-08-30 05:13:07,126 INFO L137 encePairwiseOnDemand]: 1231/1241 looper letters, 104 selfloop transitions, 15 changer transitions 0/119 dead transitions. [2023-08-30 05:13:07,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 119 transitions, 1047 flow [2023-08-30 05:13:07,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:13:07,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:13:07,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2476 transitions. [2023-08-30 05:13:07,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3990330378726833 [2023-08-30 05:13:07,128 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2476 transitions. [2023-08-30 05:13:07,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2476 transitions. [2023-08-30 05:13:07,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:13:07,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2476 transitions. [2023-08-30 05:13:07,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 495.2) internal successors, (2476), 5 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states 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 05:13:07,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1241.0) internal successors, (7446), 6 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states 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 05:13:07,134 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1241.0) internal successors, (7446), 6 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states 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 05:13:07,134 INFO L175 Difference]: Start difference. First operand has 106 places, 76 transitions, 623 flow. Second operand 5 states and 2476 transitions. [2023-08-30 05:13:07,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 119 transitions, 1047 flow [2023-08-30 05:13:07,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 119 transitions, 1000 flow, removed 2 selfloop flow, removed 10 redundant places. [2023-08-30 05:13:07,151 INFO L231 Difference]: Finished difference. Result has 103 places, 84 transitions, 687 flow [2023-08-30 05:13:07,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=687, PETRI_PLACES=103, PETRI_TRANSITIONS=84} [2023-08-30 05:13:07,151 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 29 predicate places. [2023-08-30 05:13:07,152 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 84 transitions, 687 flow [2023-08-30 05:13:07,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 485.6) internal successors, (2428), 5 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states 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 05:13:07,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:13:07,152 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:13:07,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-30 05:13:07,153 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:13:07,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:13:07,153 INFO L85 PathProgramCache]: Analyzing trace with hash -972902513, now seen corresponding path program 2 times [2023-08-30 05:13:07,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:13:07,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798879068] [2023-08-30 05:13:07,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:13:07,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:13:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:13:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-08-30 05:13:08,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:13:08,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798879068] [2023-08-30 05:13:08,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798879068] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:13:08,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:13:08,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-30 05:13:08,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148585751] [2023-08-30 05:13:08,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:13:08,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 05:13:08,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:13:08,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 05:13:08,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-30 05:13:08,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 474 out of 1241 [2023-08-30 05:13:08,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 84 transitions, 687 flow. Second operand has 9 states, 9 states have (on average 476.55555555555554) internal successors, (4289), 9 states have internal predecessors, (4289), 0 states have call successors, (0), 0 states 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 05:13:08,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:13:08,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 474 of 1241 [2023-08-30 05:13:08,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:13:09,977 INFO L130 PetriNetUnfolder]: 3930/6319 cut-off events. [2023-08-30 05:13:09,978 INFO L131 PetriNetUnfolder]: For 12872/12872 co-relation queries the response was YES. [2023-08-30 05:13:10,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23633 conditions, 6319 events. 3930/6319 cut-off events. For 12872/12872 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 30300 event pairs, 2554 based on Foata normal form. 21/6230 useless extension candidates. Maximal degree in co-relation 23596. Up to 5322 conditions per place. [2023-08-30 05:13:10,019 INFO L137 encePairwiseOnDemand]: 1230/1241 looper letters, 103 selfloop transitions, 17 changer transitions 0/120 dead transitions. [2023-08-30 05:13:10,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 120 transitions, 1083 flow [2023-08-30 05:13:10,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 05:13:10,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 05:13:10,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3384 transitions. [2023-08-30 05:13:10,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38954759986186255 [2023-08-30 05:13:10,022 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3384 transitions. [2023-08-30 05:13:10,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3384 transitions. [2023-08-30 05:13:10,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:13:10,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3384 transitions. [2023-08-30 05:13:10,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 483.42857142857144) internal successors, (3384), 7 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states 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 05:13:10,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1241.0) internal successors, (9928), 8 states have internal predecessors, (9928), 0 states have call successors, (0), 0 states 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 05:13:10,028 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1241.0) internal successors, (9928), 8 states have internal predecessors, (9928), 0 states have call successors, (0), 0 states 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 05:13:10,029 INFO L175 Difference]: Start difference. First operand has 103 places, 84 transitions, 687 flow. Second operand 7 states and 3384 transitions. [2023-08-30 05:13:10,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 120 transitions, 1083 flow [2023-08-30 05:13:10,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 120 transitions, 1083 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 05:13:10,053 INFO L231 Difference]: Finished difference. Result has 111 places, 87 transitions, 767 flow [2023-08-30 05:13:10,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=767, PETRI_PLACES=111, PETRI_TRANSITIONS=87} [2023-08-30 05:13:10,053 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 37 predicate places. [2023-08-30 05:13:10,053 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 87 transitions, 767 flow [2023-08-30 05:13:10,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 476.55555555555554) internal successors, (4289), 9 states have internal predecessors, (4289), 0 states have call successors, (0), 0 states 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 05:13:10,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:13:10,054 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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 05:13:10,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-30 05:13:10,055 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:13:10,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:13:10,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1341286550, now seen corresponding path program 1 times [2023-08-30 05:13:10,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:13:10,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604770070] [2023-08-30 05:13:10,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:13:10,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:13:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:13:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-08-30 05:13:10,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:13:10,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604770070] [2023-08-30 05:13:10,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604770070] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:13:10,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:13:10,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:13:10,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440557632] [2023-08-30 05:13:10,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:13:10,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:13:10,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:13:10,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:13:10,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:13:10,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 491 out of 1241 [2023-08-30 05:13:10,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 87 transitions, 767 flow. Second operand has 4 states, 4 states have (on average 497.0) internal successors, (1988), 4 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states 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 05:13:10,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:13:10,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 491 of 1241 [2023-08-30 05:13:10,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:13:12,213 INFO L130 PetriNetUnfolder]: 5585/9003 cut-off events. [2023-08-30 05:13:12,213 INFO L131 PetriNetUnfolder]: For 22515/22515 co-relation queries the response was YES. [2023-08-30 05:13:12,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34673 conditions, 9003 events. 5585/9003 cut-off events. For 22515/22515 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 47430 event pairs, 2468 based on Foata normal form. 154/9047 useless extension candidates. Maximal degree in co-relation 34632. Up to 5905 conditions per place. [2023-08-30 05:13:12,279 INFO L137 encePairwiseOnDemand]: 1234/1241 looper letters, 97 selfloop transitions, 22 changer transitions 9/128 dead transitions. [2023-08-30 05:13:12,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 128 transitions, 1328 flow [2023-08-30 05:13:12,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:13:12,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:13:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2021 transitions. [2023-08-30 05:13:12,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40713134568896053 [2023-08-30 05:13:12,281 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2021 transitions. [2023-08-30 05:13:12,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2021 transitions. [2023-08-30 05:13:12,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:13:12,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2021 transitions. [2023-08-30 05:13:12,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 505.25) internal successors, (2021), 4 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states 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 05:13:12,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1241.0) internal successors, (6205), 5 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states 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 05:13:12,286 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1241.0) internal successors, (6205), 5 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states 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 05:13:12,287 INFO L175 Difference]: Start difference. First operand has 111 places, 87 transitions, 767 flow. Second operand 4 states and 2021 transitions. [2023-08-30 05:13:12,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 128 transitions, 1328 flow [2023-08-30 05:13:12,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 128 transitions, 1325 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:13:12,326 INFO L231 Difference]: Finished difference. Result has 115 places, 100 transitions, 1030 flow [2023-08-30 05:13:12,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1030, PETRI_PLACES=115, PETRI_TRANSITIONS=100} [2023-08-30 05:13:12,327 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 41 predicate places. [2023-08-30 05:13:12,327 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 100 transitions, 1030 flow [2023-08-30 05:13:12,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 497.0) internal successors, (1988), 4 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states 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 05:13:12,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:13:12,328 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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 05:13:12,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-30 05:13:12,328 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-30 05:13:12,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:13:12,329 INFO L85 PathProgramCache]: Analyzing trace with hash -21542784, now seen corresponding path program 1 times [2023-08-30 05:13:12,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:13:12,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206111778] [2023-08-30 05:13:12,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:13:12,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:13:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:13:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 05:13:14,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:13:14,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206111778] [2023-08-30 05:13:14,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206111778] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 05:13:14,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291501528] [2023-08-30 05:13:14,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:13:14,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:13:14,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:13:14,877 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 05:13:14,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 05:13:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:13:15,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 05:13:15,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:13:16,160 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 05:13:16,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 430 treesize of output 374 [2023-08-30 05:13:16,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 05:13:16,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 69 [2023-08-30 05:13:16,232 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 05:13:16,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 69 [2023-08-30 05:13:16,829 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 05:13:16,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:13:19,339 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 05:13:19,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 273 treesize of output 277 [2023-08-30 05:13:19,355 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 05:13:19,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 269 treesize of output 273 [2023-08-30 05:13:32,603 WARN L222 SmtUtils]: Spent 12.23s on a formula simplification. DAG size of input: 44 DAG size of output: 40 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:13:33,084 INFO L321 Elim1Store]: treesize reduction 21, result has 91.3 percent of original size [2023-08-30 05:13:33,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 113 treesize of output 292 [2023-08-30 05:19:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 05:19:26,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291501528] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:19:26,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 05:19:26,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-08-30 05:19:26,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407648133] [2023-08-30 05:19:26,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 05:19:26,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 05:19:26,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:19:26,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 05:19:26,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2023-08-30 05:19:31,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:19:36,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:19:39,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:19:39,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 420 out of 1241 [2023-08-30 05:19:39,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 100 transitions, 1030 flow. Second operand has 26 states, 26 states have (on average 422.2692307692308) internal successors, (10979), 26 states have internal predecessors, (10979), 0 states have call successors, (0), 0 states 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 05:19:39,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:19:39,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 420 of 1241 [2023-08-30 05:19:39,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:20:12,066 WARN L222 SmtUtils]: Spent 24.42s on a formula simplification. DAG size of input: 95 DAG size of output: 61 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:20:15,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:20:17,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:20:46,157 WARN L222 SmtUtils]: Spent 24.18s on a formula simplification. DAG size of input: 74 DAG size of output: 57 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:21:04,944 WARN L222 SmtUtils]: Spent 18.56s on a formula simplification. DAG size of input: 159 DAG size of output: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:21:26,277 WARN L222 SmtUtils]: Spent 21.25s on a formula simplification. DAG size of input: 155 DAG size of output: 118 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:21:51,435 WARN L222 SmtUtils]: Spent 24.47s on a formula simplification. DAG size of input: 117 DAG size of output: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:22:13,069 WARN L222 SmtUtils]: Spent 21.54s on a formula simplification. DAG size of input: 174 DAG size of output: 136 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:22:35,760 WARN L222 SmtUtils]: Spent 22.59s on a formula simplification. DAG size of input: 118 DAG size of output: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:22:37,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:22:39,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:23:09,833 WARN L222 SmtUtils]: Spent 24.33s on a formula simplification. DAG size of input: 139 DAG size of output: 100 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:23:28,423 WARN L222 SmtUtils]: Spent 18.48s on a formula simplification. DAG size of input: 157 DAG size of output: 90 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:23:49,208 WARN L222 SmtUtils]: Spent 20.70s on a formula simplification. DAG size of input: 137 DAG size of output: 103 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:23:51,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:23:52,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:24:13,642 WARN L222 SmtUtils]: Spent 20.67s on a formula simplification. DAG size of input: 102 DAG size of output: 86 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:24:18,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:24:20,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Killed by 15