./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/stack_longer-1.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread/stack_longer-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 22:20:41,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 22:20:41,757 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 22:20:41,788 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 22:20:41,789 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 22:20:41,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 22:20:41,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 22:20:41,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 22:20:41,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 22:20:41,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 22:20:41,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 22:20:41,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 22:20:41,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 22:20:41,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 22:20:41,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 22:20:41,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 22:20:41,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 22:20:41,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 22:20:41,803 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 22:20:41,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 22:20:41,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 22:20:41,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 22:20:41,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 22:20:41,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 22:20:41,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 22:20:41,818 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 22:20:41,818 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 22:20:41,819 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 22:20:41,819 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 22:20:41,820 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 22:20:41,821 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 22:20:41,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 22:20:41,822 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 22:20:41,823 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 22:20:41,824 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 22:20:41,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 22:20:41,835 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 22:20:41,835 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 22:20:41,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 22:20:41,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 22:20:41,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 22:20:41,839 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-31 22:20:41,861 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 22:20:41,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 22:20:41,862 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 22:20:41,862 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 22:20:41,863 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 22:20:41,863 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 22:20:41,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 22:20:41,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 22:20:41,864 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 22:20:41,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 22:20:41,864 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 22:20:41,865 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 22:20:41,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 22:20:41,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 22:20:41,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 22:20:41,865 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-31 22:20:41,866 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-31 22:20:41,866 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-31 22:20:41,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 22:20:41,866 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-31 22:20:41,866 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 22:20:41,866 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 22:20:41,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 22:20:41,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 22:20:41,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 22:20:41,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:20:41,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 22:20:41,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 22:20:41,868 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 22:20:41,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 22:20:41,868 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 22:20:41,869 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 22:20:41,869 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 22:20:41,869 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 22:20:41,869 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 22:20:42,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 22:20:42,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 22:20:42,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 22:20:42,206 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 22:20:42,207 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 22:20:42,208 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-1.i [2023-08-31 22:20:43,350 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 22:20:43,633 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 22:20:43,637 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i [2023-08-31 22:20:43,656 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f1e0f6e1/36bd73b9f0d444a98334752113a4744f/FLAGa97970991 [2023-08-31 22:20:43,668 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f1e0f6e1/36bd73b9f0d444a98334752113a4744f [2023-08-31 22:20:43,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 22:20:43,671 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 22:20:43,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 22:20:43,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 22:20:43,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 22:20:43,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:20:43" (1/1) ... [2023-08-31 22:20:43,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@653a7251 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:43, skipping insertion in model container [2023-08-31 22:20:43,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:20:43" (1/1) ... [2023-08-31 22:20:43,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 22:20:43,728 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 22:20:44,064 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i[41527,41540] [2023-08-31 22:20:44,098 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:20:44,111 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 22:20:44,165 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i[41527,41540] [2023-08-31 22:20:44,182 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:20:44,236 INFO L208 MainTranslator]: Completed translation [2023-08-31 22:20:44,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:44 WrapperNode [2023-08-31 22:20:44,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 22:20:44,237 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 22:20:44,237 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 22:20:44,238 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 22:20:44,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:44" (1/1) ... [2023-08-31 22:20:44,257 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:44" (1/1) ... [2023-08-31 22:20:44,284 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 156 [2023-08-31 22:20:44,284 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 22:20:44,285 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 22:20:44,285 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 22:20:44,285 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 22:20:44,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:44" (1/1) ... [2023-08-31 22:20:44,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:44" (1/1) ... [2023-08-31 22:20:44,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:44" (1/1) ... [2023-08-31 22:20:44,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:44" (1/1) ... [2023-08-31 22:20:44,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:44" (1/1) ... [2023-08-31 22:20:44,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:44" (1/1) ... [2023-08-31 22:20:44,310 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:44" (1/1) ... [2023-08-31 22:20:44,312 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:44" (1/1) ... [2023-08-31 22:20:44,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 22:20:44,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 22:20:44,317 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 22:20:44,317 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 22:20:44,319 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:44" (1/1) ... [2023-08-31 22:20:44,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:20:44,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:20:44,365 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) [2023-08-31 22:20:44,386 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 [2023-08-31 22:20:44,400 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-31 22:20:44,400 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-31 22:20:44,401 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-31 22:20:44,401 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-31 22:20:44,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 22:20:44,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 22:20:44,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 22:20:44,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 22:20:44,402 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 22:20:44,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 22:20:44,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 22:20:44,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 22:20:44,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 22:20:44,404 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 22:20:44,562 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 22:20:44,564 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 22:20:44,970 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 22:20:44,977 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 22:20:44,977 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 22:20:44,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:20:44 BoogieIcfgContainer [2023-08-31 22:20:44,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 22:20:44,981 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 22:20:44,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 22:20:44,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 22:20:44,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 10:20:43" (1/3) ... [2023-08-31 22:20:44,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42148a72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:20:44, skipping insertion in model container [2023-08-31 22:20:44,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:44" (2/3) ... [2023-08-31 22:20:44,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42148a72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:20:44, skipping insertion in model container [2023-08-31 22:20:44,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:20:44" (3/3) ... [2023-08-31 22:20:44,993 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2023-08-31 22:20:45,010 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 22:20:45,011 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-31 22:20:45,011 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 22:20:45,132 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 22:20:45,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 174 transitions, 364 flow [2023-08-31 22:20:45,259 INFO L130 PetriNetUnfolder]: 10/172 cut-off events. [2023-08-31 22:20:45,259 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:20:45,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 172 events. 10/172 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 447 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2023-08-31 22:20:45,267 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 174 transitions, 364 flow [2023-08-31 22:20:45,275 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 168 transitions, 348 flow [2023-08-31 22:20:45,279 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:20:45,297 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 168 transitions, 348 flow [2023-08-31 22:20:45,301 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 168 transitions, 348 flow [2023-08-31 22:20:45,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 168 transitions, 348 flow [2023-08-31 22:20:45,375 INFO L130 PetriNetUnfolder]: 10/168 cut-off events. [2023-08-31 22:20:45,376 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:20:45,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 10/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 442 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2023-08-31 22:20:45,385 INFO L119 LiptonReduction]: Number of co-enabled transitions 8718 [2023-08-31 22:20:49,866 INFO L134 LiptonReduction]: Checked pairs total: 13763 [2023-08-31 22:20:49,866 INFO L136 LiptonReduction]: Total number of compositions: 165 [2023-08-31 22:20:49,879 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 22:20:49,884 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;@6b5a7092, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:20:49,885 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-31 22:20:49,887 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-31 22:20:49,887 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:20:49,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:49,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-31 22:20:49,889 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:49,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:49,893 INFO L85 PathProgramCache]: Analyzing trace with hash 709, now seen corresponding path program 1 times [2023-08-31 22:20:49,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:49,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414953415] [2023-08-31 22:20:49,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:49,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:49,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:49,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:49,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414953415] [2023-08-31 22:20:49,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414953415] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:49,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:49,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-31 22:20:49,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346878313] [2023-08-31 22:20:49,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:49,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-31 22:20:50,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:50,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-31 22:20:50,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-31 22:20:50,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 339 [2023-08-31 22:20:50,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:50,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:50,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 339 [2023-08-31 22:20:50,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:50,263 INFO L130 PetriNetUnfolder]: 1456/2263 cut-off events. [2023-08-31 22:20:50,263 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 22:20:50,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4548 conditions, 2263 events. 1456/2263 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10457 event pairs, 1176 based on Foata normal form. 0/1293 useless extension candidates. Maximal degree in co-relation 4296. Up to 2240 conditions per place. [2023-08-31 22:20:50,278 INFO L137 encePairwiseOnDemand]: 337/339 looper letters, 44 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2023-08-31 22:20:50,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 190 flow [2023-08-31 22:20:50,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-31 22:20:50,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-31 22:20:50,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 372 transitions. [2023-08-31 22:20:50,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5486725663716814 [2023-08-31 22:20:50,292 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 372 transitions. [2023-08-31 22:20:50,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 372 transitions. [2023-08-31 22:20:50,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:50,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 372 transitions. [2023-08-31 22:20:50,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 186.0) internal successors, (372), 2 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:50,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 339.0) internal successors, (1017), 3 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:50,305 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 339.0) internal successors, (1017), 3 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:50,307 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 2 states and 372 transitions. [2023-08-31 22:20:50,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 190 flow [2023-08-31 22:20:50,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 182 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 22:20:50,312 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 94 flow [2023-08-31 22:20:50,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-08-31 22:20:50,322 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-31 22:20:50,322 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 94 flow [2023-08-31 22:20:50,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:50,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:50,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:20:50,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 22:20:50,323 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:50,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:50,332 INFO L85 PathProgramCache]: Analyzing trace with hash 695919, now seen corresponding path program 1 times [2023-08-31 22:20:50,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:50,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149951028] [2023-08-31 22:20:50,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:50,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:50,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:50,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:50,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149951028] [2023-08-31 22:20:50,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149951028] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:50,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:50,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:20:50,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248857521] [2023-08-31 22:20:50,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:50,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:20:50,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:50,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:20:50,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:20:50,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 339 [2023-08-31 22:20:50,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:50,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:50,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 339 [2023-08-31 22:20:50,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:50,859 INFO L130 PetriNetUnfolder]: 1427/2208 cut-off events. [2023-08-31 22:20:50,859 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-31 22:20:50,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4409 conditions, 2208 events. 1427/2208 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10100 event pairs, 1152 based on Foata normal form. 0/1274 useless extension candidates. Maximal degree in co-relation 4406. Up to 2183 conditions per place. [2023-08-31 22:20:50,870 INFO L137 encePairwiseOnDemand]: 335/339 looper letters, 40 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-08-31 22:20:50,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 174 flow [2023-08-31 22:20:50,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:20:50,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:20:50,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-08-31 22:20:50,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5093411996066863 [2023-08-31 22:20:50,874 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-08-31 22:20:50,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-08-31 22:20:50,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:50,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-08-31 22:20:50,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:50,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:50,880 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:50,880 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 94 flow. Second operand 3 states and 518 transitions. [2023-08-31 22:20:50,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 174 flow [2023-08-31 22:20:50,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 22:20:50,882 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 94 flow [2023-08-31 22:20:50,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-08-31 22:20:50,883 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-31 22:20:50,883 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 94 flow [2023-08-31 22:20:50,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:50,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:50,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:20:50,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 22:20:50,884 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:50,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:50,885 INFO L85 PathProgramCache]: Analyzing trace with hash 695920, now seen corresponding path program 1 times [2023-08-31 22:20:50,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:50,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103555174] [2023-08-31 22:20:50,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:50,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:50,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:50,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103555174] [2023-08-31 22:20:50,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103555174] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:50,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:50,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:20:50,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228988679] [2023-08-31 22:20:50,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:50,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:20:50,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:50,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:20:50,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:20:50,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 339 [2023-08-31 22:20:50,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:50,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:50,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 339 [2023-08-31 22:20:50,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:51,174 INFO L130 PetriNetUnfolder]: 1398/2153 cut-off events. [2023-08-31 22:20:51,174 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-31 22:20:51,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4302 conditions, 2153 events. 1398/2153 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9752 event pairs, 1128 based on Foata normal form. 0/1255 useless extension candidates. Maximal degree in co-relation 4298. Up to 2128 conditions per place. [2023-08-31 22:20:51,188 INFO L137 encePairwiseOnDemand]: 335/339 looper letters, 38 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-31 22:20:51,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 170 flow [2023-08-31 22:20:51,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:20:51,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:20:51,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2023-08-31 22:20:51,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49557522123893805 [2023-08-31 22:20:51,191 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2023-08-31 22:20:51,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2023-08-31 22:20:51,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:51,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2023-08-31 22:20:51,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:51,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:51,195 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:51,195 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 94 flow. Second operand 3 states and 504 transitions. [2023-08-31 22:20:51,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 170 flow [2023-08-31 22:20:51,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:20:51,198 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 90 flow [2023-08-31 22:20:51,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-08-31 22:20:51,200 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-08-31 22:20:51,200 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 90 flow [2023-08-31 22:20:51,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:51,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:51,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 22:20:51,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 22:20:51,201 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:51,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:51,202 INFO L85 PathProgramCache]: Analyzing trace with hash 668793599, now seen corresponding path program 1 times [2023-08-31 22:20:51,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:51,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008225446] [2023-08-31 22:20:51,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:51,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:51,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:51,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008225446] [2023-08-31 22:20:51,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008225446] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:51,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:51,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:20:51,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266795756] [2023-08-31 22:20:51,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:51,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:20:51,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:51,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:20:51,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:20:51,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 339 [2023-08-31 22:20:51,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 151.25) internal successors, (605), 4 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:51,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:51,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 339 [2023-08-31 22:20:51,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:51,507 INFO L130 PetriNetUnfolder]: 1021/1601 cut-off events. [2023-08-31 22:20:51,507 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-31 22:20:51,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3204 conditions, 1601 events. 1021/1601 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6948 event pairs, 816 based on Foata normal form. 0/1007 useless extension candidates. Maximal degree in co-relation 3200. Up to 1582 conditions per place. [2023-08-31 22:20:51,516 INFO L137 encePairwiseOnDemand]: 336/339 looper letters, 37 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-31 22:20:51,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 166 flow [2023-08-31 22:20:51,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:20:51,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:20:51,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2023-08-31 22:20:51,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48180924287118976 [2023-08-31 22:20:51,519 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2023-08-31 22:20:51,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2023-08-31 22:20:51,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:51,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2023-08-31 22:20:51,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:51,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:51,523 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:51,523 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 90 flow. Second operand 3 states and 490 transitions. [2023-08-31 22:20:51,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 166 flow [2023-08-31 22:20:51,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:20:51,525 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2023-08-31 22:20:51,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-08-31 22:20:51,526 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -8 predicate places. [2023-08-31 22:20:51,526 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2023-08-31 22:20:51,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.25) internal successors, (605), 4 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:51,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:51,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 22:20:51,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 22:20:51,527 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:51,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:51,528 INFO L85 PathProgramCache]: Analyzing trace with hash 668793600, now seen corresponding path program 1 times [2023-08-31 22:20:51,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:51,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891474393] [2023-08-31 22:20:51,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:51,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:51,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:51,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:51,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891474393] [2023-08-31 22:20:51,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891474393] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:51,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:51,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:20:51,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353589932] [2023-08-31 22:20:51,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:51,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:20:51,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:51,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:20:51,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:20:51,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 339 [2023-08-31 22:20:51,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:51,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:51,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 339 [2023-08-31 22:20:51,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:51,713 INFO L130 PetriNetUnfolder]: 644/1049 cut-off events. [2023-08-31 22:20:51,713 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-31 22:20:51,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2106 conditions, 1049 events. 644/1049 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4379 event pairs, 504 based on Foata normal form. 0/759 useless extension candidates. Maximal degree in co-relation 2102. Up to 1036 conditions per place. [2023-08-31 22:20:51,718 INFO L137 encePairwiseOnDemand]: 336/339 looper letters, 36 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-31 22:20:51,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 162 flow [2023-08-31 22:20:51,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:20:51,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:20:51,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2023-08-31 22:20:51,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49557522123893805 [2023-08-31 22:20:51,721 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2023-08-31 22:20:51,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2023-08-31 22:20:51,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:51,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2023-08-31 22:20:51,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:51,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:51,725 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:51,726 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 504 transitions. [2023-08-31 22:20:51,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 162 flow [2023-08-31 22:20:51,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:20:51,727 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2023-08-31 22:20:51,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-08-31 22:20:51,728 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -9 predicate places. [2023-08-31 22:20:51,728 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2023-08-31 22:20:51,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:51,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:51,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 22:20:51,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 22:20:51,729 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:51,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:51,730 INFO L85 PathProgramCache]: Analyzing trace with hash -742837340, now seen corresponding path program 1 times [2023-08-31 22:20:51,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:51,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630726718] [2023-08-31 22:20:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:51,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:51,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:51,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:51,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630726718] [2023-08-31 22:20:51,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630726718] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:51,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:51,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:20:51,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064971668] [2023-08-31 22:20:51,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:51,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:20:51,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:51,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:20:51,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:20:51,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 339 [2023-08-31 22:20:51,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:51,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:51,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 339 [2023-08-31 22:20:51,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:52,104 INFO L130 PetriNetUnfolder]: 793/1277 cut-off events. [2023-08-31 22:20:52,104 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-31 22:20:52,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2569 conditions, 1277 events. 793/1277 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5739 event pairs, 153 based on Foata normal form. 0/937 useless extension candidates. Maximal degree in co-relation 2565. Up to 944 conditions per place. [2023-08-31 22:20:52,111 INFO L137 encePairwiseOnDemand]: 334/339 looper letters, 58 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2023-08-31 22:20:52,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 64 transitions, 267 flow [2023-08-31 22:20:52,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:20:52,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:20:52,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 688 transitions. [2023-08-31 22:20:52,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073746312684366 [2023-08-31 22:20:52,114 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 688 transitions. [2023-08-31 22:20:52,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 688 transitions. [2023-08-31 22:20:52,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:52,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 688 transitions. [2023-08-31 22:20:52,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:52,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 339.0) internal successors, (1695), 5 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:52,120 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 339.0) internal successors, (1695), 5 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:52,120 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 4 states and 688 transitions. [2023-08-31 22:20:52,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 64 transitions, 267 flow [2023-08-31 22:20:52,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 64 transitions, 261 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:20:52,122 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 104 flow [2023-08-31 22:20:52,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2023-08-31 22:20:52,123 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -8 predicate places. [2023-08-31 22:20:52,123 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 104 flow [2023-08-31 22:20:52,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:52,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:52,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 22:20:52,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 22:20:52,124 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:52,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:52,125 INFO L85 PathProgramCache]: Analyzing trace with hash -742837339, now seen corresponding path program 1 times [2023-08-31 22:20:52,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:52,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607689791] [2023-08-31 22:20:52,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:52,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:52,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:52,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607689791] [2023-08-31 22:20:52,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607689791] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:52,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:52,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:20:52,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823467601] [2023-08-31 22:20:52,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:52,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:20:52,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:52,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:20:52,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:20:52,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 339 [2023-08-31 22:20:52,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 158.5) internal successors, (634), 4 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:52,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:52,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 339 [2023-08-31 22:20:52,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:52,683 INFO L130 PetriNetUnfolder]: 1053/1715 cut-off events. [2023-08-31 22:20:52,683 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-08-31 22:20:52,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3629 conditions, 1715 events. 1053/1715 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7674 event pairs, 161 based on Foata normal form. 0/1311 useless extension candidates. Maximal degree in co-relation 3624. Up to 1262 conditions per place. [2023-08-31 22:20:52,691 INFO L137 encePairwiseOnDemand]: 333/339 looper letters, 75 selfloop transitions, 5 changer transitions 0/81 dead transitions. [2023-08-31 22:20:52,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 81 transitions, 354 flow [2023-08-31 22:20:52,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:20:52,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:20:52,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 707 transitions. [2023-08-31 22:20:52,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213864306784661 [2023-08-31 22:20:52,694 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 707 transitions. [2023-08-31 22:20:52,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 707 transitions. [2023-08-31 22:20:52,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:52,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 707 transitions. [2023-08-31 22:20:52,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.75) internal successors, (707), 4 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:52,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 339.0) internal successors, (1695), 5 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:52,699 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 339.0) internal successors, (1695), 5 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:52,699 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 104 flow. Second operand 4 states and 707 transitions. [2023-08-31 22:20:52,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 81 transitions, 354 flow [2023-08-31 22:20:52,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 81 transitions, 350 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:20:52,704 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 138 flow [2023-08-31 22:20:52,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-31 22:20:52,706 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2023-08-31 22:20:52,707 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 138 flow [2023-08-31 22:20:52,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.5) internal successors, (634), 4 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:52,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:52,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:20:52,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 22:20:52,708 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:52,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:52,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1408310531, now seen corresponding path program 1 times [2023-08-31 22:20:52,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:52,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242156807] [2023-08-31 22:20:52,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:52,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:52,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:52,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:52,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242156807] [2023-08-31 22:20:52,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242156807] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:52,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:52,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:20:52,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719754563] [2023-08-31 22:20:52,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:52,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:20:52,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:52,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:20:52,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:20:52,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 339 [2023-08-31 22:20:52,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:52,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:52,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 339 [2023-08-31 22:20:52,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:52,931 INFO L130 PetriNetUnfolder]: 702/1159 cut-off events. [2023-08-31 22:20:52,931 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2023-08-31 22:20:52,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2536 conditions, 1159 events. 702/1159 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4447 event pairs, 315 based on Foata normal form. 22/933 useless extension candidates. Maximal degree in co-relation 2529. Up to 900 conditions per place. [2023-08-31 22:20:52,937 INFO L137 encePairwiseOnDemand]: 336/339 looper letters, 55 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-31 22:20:52,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 58 transitions, 265 flow [2023-08-31 22:20:52,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:20:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:20:52,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 538 transitions. [2023-08-31 22:20:52,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5290068829891839 [2023-08-31 22:20:52,939 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 538 transitions. [2023-08-31 22:20:52,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 538 transitions. [2023-08-31 22:20:52,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:52,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 538 transitions. [2023-08-31 22:20:52,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:52,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:52,943 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:52,943 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 138 flow. Second operand 3 states and 538 transitions. [2023-08-31 22:20:52,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 58 transitions, 265 flow [2023-08-31 22:20:52,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 58 transitions, 257 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-31 22:20:52,946 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 118 flow [2023-08-31 22:20:52,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-08-31 22:20:52,947 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2023-08-31 22:20:52,947 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 118 flow [2023-08-31 22:20:52,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:52,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:52,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:20:52,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 22:20:52,948 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:52,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:52,949 INFO L85 PathProgramCache]: Analyzing trace with hash 635935809, now seen corresponding path program 1 times [2023-08-31 22:20:52,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:52,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001639341] [2023-08-31 22:20:52,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:52,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:52,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:52,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001639341] [2023-08-31 22:20:52,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001639341] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:52,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:52,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:20:52,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530786291] [2023-08-31 22:20:52,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:52,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:20:52,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:52,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:20:52,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:20:52,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 339 [2023-08-31 22:20:52,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:52,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:52,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 339 [2023-08-31 22:20:52,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:53,143 INFO L130 PetriNetUnfolder]: 733/1208 cut-off events. [2023-08-31 22:20:53,143 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2023-08-31 22:20:53,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2692 conditions, 1208 events. 733/1208 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4721 event pairs, 528 based on Foata normal form. 38/1028 useless extension candidates. Maximal degree in co-relation 2685. Up to 1102 conditions per place. [2023-08-31 22:20:53,149 INFO L137 encePairwiseOnDemand]: 336/339 looper letters, 56 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2023-08-31 22:20:53,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 61 transitions, 281 flow [2023-08-31 22:20:53,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:20:53,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:20:53,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 534 transitions. [2023-08-31 22:20:53,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5250737463126843 [2023-08-31 22:20:53,151 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 534 transitions. [2023-08-31 22:20:53,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 534 transitions. [2023-08-31 22:20:53,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:53,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 534 transitions. [2023-08-31 22:20:53,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:53,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:53,155 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:53,155 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 118 flow. Second operand 3 states and 534 transitions. [2023-08-31 22:20:53,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 61 transitions, 281 flow [2023-08-31 22:20:53,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 61 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:20:53,157 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 136 flow [2023-08-31 22:20:53,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-08-31 22:20:53,158 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-08-31 22:20:53,158 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 136 flow [2023-08-31 22:20:53,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:53,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:53,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:20:53,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 22:20:53,159 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:53,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:53,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1811534857, now seen corresponding path program 1 times [2023-08-31 22:20:53,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:53,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25126416] [2023-08-31 22:20:53,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:53,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:53,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:53,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25126416] [2023-08-31 22:20:53,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25126416] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:53,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:53,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:20:53,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255325914] [2023-08-31 22:20:53,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:53,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:20:53,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:53,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:20:53,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:20:53,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 339 [2023-08-31 22:20:53,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:53,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:53,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 339 [2023-08-31 22:20:53,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:53,341 INFO L130 PetriNetUnfolder]: 756/1233 cut-off events. [2023-08-31 22:20:53,342 INFO L131 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2023-08-31 22:20:53,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2910 conditions, 1233 events. 756/1233 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 5320 event pairs, 261 based on Foata normal form. 0/1021 useless extension candidates. Maximal degree in co-relation 2902. Up to 1007 conditions per place. [2023-08-31 22:20:53,350 INFO L137 encePairwiseOnDemand]: 336/339 looper letters, 62 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-08-31 22:20:53,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 65 transitions, 309 flow [2023-08-31 22:20:53,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:20:53,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:20:53,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2023-08-31 22:20:53,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319567354965585 [2023-08-31 22:20:53,352 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2023-08-31 22:20:53,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2023-08-31 22:20:53,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:53,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2023-08-31 22:20:53,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:53,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:53,356 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:53,356 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 136 flow. Second operand 3 states and 541 transitions. [2023-08-31 22:20:53,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 65 transitions, 309 flow [2023-08-31 22:20:53,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 65 transitions, 303 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:20:53,360 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 138 flow [2023-08-31 22:20:53,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2023-08-31 22:20:53,361 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2023-08-31 22:20:53,361 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 138 flow [2023-08-31 22:20:53,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:53,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:53,362 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:20:53,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 22:20:53,362 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:53,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:53,362 INFO L85 PathProgramCache]: Analyzing trace with hash 2007869220, now seen corresponding path program 1 times [2023-08-31 22:20:53,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:53,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105019970] [2023-08-31 22:20:53,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:53,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:53,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:53,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105019970] [2023-08-31 22:20:53,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105019970] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:20:53,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181471734] [2023-08-31 22:20:53,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:53,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:20:53,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:20:53,657 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) [2023-08-31 22:20:53,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 22:20:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:53,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-31 22:20:53,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:20:53,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:20:53,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:20:53,938 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-31 22:20:53,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2023-08-31 22:20:53,975 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-31 22:20:53,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-31 22:20:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:54,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:20:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:54,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181471734] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:20:54,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:20:54,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2023-08-31 22:20:54,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964444818] [2023-08-31 22:20:54,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:20:54,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 22:20:54,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:54,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 22:20:54,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-08-31 22:20:55,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 339 [2023-08-31 22:20:55,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 138 flow. Second operand has 18 states, 18 states have (on average 148.33333333333334) internal successors, (2670), 18 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:55,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:55,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 339 [2023-08-31 22:20:55,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:56,416 INFO L130 PetriNetUnfolder]: 1800/2943 cut-off events. [2023-08-31 22:20:56,416 INFO L131 PetriNetUnfolder]: For 587/587 co-relation queries the response was YES. [2023-08-31 22:20:56,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7023 conditions, 2943 events. 1800/2943 cut-off events. For 587/587 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 13825 event pairs, 193 based on Foata normal form. 44/2547 useless extension candidates. Maximal degree in co-relation 7014. Up to 1107 conditions per place. [2023-08-31 22:20:56,430 INFO L137 encePairwiseOnDemand]: 330/339 looper letters, 177 selfloop transitions, 17 changer transitions 0/195 dead transitions. [2023-08-31 22:20:56,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 195 transitions, 905 flow [2023-08-31 22:20:56,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 22:20:56,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 22:20:56,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1949 transitions. [2023-08-31 22:20:56,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47910521140609635 [2023-08-31 22:20:56,436 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1949 transitions. [2023-08-31 22:20:56,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1949 transitions. [2023-08-31 22:20:56,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:56,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1949 transitions. [2023-08-31 22:20:56,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 162.41666666666666) internal successors, (1949), 12 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:56,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 339.0) internal successors, (4407), 13 states have internal predecessors, (4407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:56,447 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 339.0) internal successors, (4407), 13 states have internal predecessors, (4407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:56,448 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 138 flow. Second operand 12 states and 1949 transitions. [2023-08-31 22:20:56,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 195 transitions, 905 flow [2023-08-31 22:20:56,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 195 transitions, 902 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:20:56,453 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 270 flow [2023-08-31 22:20:56,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=270, PETRI_PLACES=65, PETRI_TRANSITIONS=58} [2023-08-31 22:20:56,454 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 16 predicate places. [2023-08-31 22:20:56,454 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 270 flow [2023-08-31 22:20:56,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.33333333333334) internal successors, (2670), 18 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:56,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:56,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:20:56,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 22:20:56,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-31 22:20:56,662 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:56,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:56,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1422879367, now seen corresponding path program 1 times [2023-08-31 22:20:56,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:56,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114981180] [2023-08-31 22:20:56,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:56,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:56,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:56,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114981180] [2023-08-31 22:20:56,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114981180] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:56,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:56,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:20:56,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264273167] [2023-08-31 22:20:56,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:56,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:20:56,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:56,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:20:56,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:20:56,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 339 [2023-08-31 22:20:56,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:56,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:56,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 339 [2023-08-31 22:20:56,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:56,912 INFO L130 PetriNetUnfolder]: 556/1039 cut-off events. [2023-08-31 22:20:56,912 INFO L131 PetriNetUnfolder]: For 427/427 co-relation queries the response was YES. [2023-08-31 22:20:56,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2777 conditions, 1039 events. 556/1039 cut-off events. For 427/427 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4271 event pairs, 73 based on Foata normal form. 42/1019 useless extension candidates. Maximal degree in co-relation 2761. Up to 817 conditions per place. [2023-08-31 22:20:56,921 INFO L137 encePairwiseOnDemand]: 334/339 looper letters, 52 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2023-08-31 22:20:56,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 60 transitions, 368 flow [2023-08-31 22:20:56,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:20:56,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:20:56,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2023-08-31 22:20:56,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5103244837758112 [2023-08-31 22:20:56,924 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2023-08-31 22:20:56,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2023-08-31 22:20:56,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:56,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2023-08-31 22:20:56,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:56,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:56,928 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:56,929 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 270 flow. Second operand 3 states and 519 transitions. [2023-08-31 22:20:56,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 60 transitions, 368 flow [2023-08-31 22:20:56,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 60 transitions, 348 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-31 22:20:56,933 INFO L231 Difference]: Finished difference. Result has 61 places, 51 transitions, 220 flow [2023-08-31 22:20:56,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=61, PETRI_TRANSITIONS=51} [2023-08-31 22:20:56,935 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 12 predicate places. [2023-08-31 22:20:56,936 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 51 transitions, 220 flow [2023-08-31 22:20:56,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:56,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:56,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:20:56,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 22:20:56,937 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:56,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:56,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1525694433, now seen corresponding path program 1 times [2023-08-31 22:20:56,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:56,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350963550] [2023-08-31 22:20:56,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:56,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:56,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:57,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:57,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350963550] [2023-08-31 22:20:57,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350963550] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:57,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:57,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-31 22:20:57,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128438221] [2023-08-31 22:20:57,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:57,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 22:20:57,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:57,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 22:20:57,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-08-31 22:20:58,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 339 [2023-08-31 22:20:58,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 51 transitions, 220 flow. Second operand has 12 states, 12 states have (on average 143.66666666666666) internal successors, (1724), 12 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:58,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:58,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 339 [2023-08-31 22:20:58,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:58,781 INFO L130 PetriNetUnfolder]: 728/1357 cut-off events. [2023-08-31 22:20:58,781 INFO L131 PetriNetUnfolder]: For 469/469 co-relation queries the response was YES. [2023-08-31 22:20:58,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3629 conditions, 1357 events. 728/1357 cut-off events. For 469/469 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 6042 event pairs, 104 based on Foata normal form. 6/1321 useless extension candidates. Maximal degree in co-relation 3614. Up to 694 conditions per place. [2023-08-31 22:20:58,801 INFO L137 encePairwiseOnDemand]: 326/339 looper letters, 134 selfloop transitions, 17 changer transitions 0/152 dead transitions. [2023-08-31 22:20:58,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 152 transitions, 846 flow [2023-08-31 22:20:58,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 22:20:58,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 22:20:58,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1854 transitions. [2023-08-31 22:20:58,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557522123893805 [2023-08-31 22:20:58,807 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1854 transitions. [2023-08-31 22:20:58,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1854 transitions. [2023-08-31 22:20:58,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:58,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1854 transitions. [2023-08-31 22:20:58,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 154.5) internal successors, (1854), 12 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:58,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 339.0) internal successors, (4407), 13 states have internal predecessors, (4407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:58,819 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 339.0) internal successors, (4407), 13 states have internal predecessors, (4407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:58,819 INFO L175 Difference]: Start difference. First operand has 61 places, 51 transitions, 220 flow. Second operand 12 states and 1854 transitions. [2023-08-31 22:20:58,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 152 transitions, 846 flow [2023-08-31 22:20:58,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 152 transitions, 826 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:20:58,825 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 328 flow [2023-08-31 22:20:58,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=328, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2023-08-31 22:20:58,826 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 28 predicate places. [2023-08-31 22:20:58,827 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 328 flow [2023-08-31 22:20:58,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 143.66666666666666) internal successors, (1724), 12 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:58,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:58,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:20:58,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 22:20:58,828 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:58,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:58,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1621935710, now seen corresponding path program 1 times [2023-08-31 22:20:58,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:58,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775984091] [2023-08-31 22:20:58,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:58,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:58,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:58,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775984091] [2023-08-31 22:20:58,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775984091] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:58,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:58,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 22:20:58,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761010571] [2023-08-31 22:20:58,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:58,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:20:58,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:58,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:20:58,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:20:59,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 339 [2023-08-31 22:20:59,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 62 transitions, 328 flow. Second operand has 6 states, 6 states have (on average 155.33333333333334) internal successors, (932), 6 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:59,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:59,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 339 [2023-08-31 22:20:59,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:59,429 INFO L130 PetriNetUnfolder]: 878/1631 cut-off events. [2023-08-31 22:20:59,429 INFO L131 PetriNetUnfolder]: For 893/893 co-relation queries the response was YES. [2023-08-31 22:20:59,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4707 conditions, 1631 events. 878/1631 cut-off events. For 893/893 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 7605 event pairs, 116 based on Foata normal form. 0/1613 useless extension candidates. Maximal degree in co-relation 4685. Up to 768 conditions per place. [2023-08-31 22:20:59,439 INFO L137 encePairwiseOnDemand]: 332/339 looper letters, 87 selfloop transitions, 9 changer transitions 0/97 dead transitions. [2023-08-31 22:20:59,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 97 transitions, 667 flow [2023-08-31 22:20:59,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 22:20:59,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 22:20:59,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1137 transitions. [2023-08-31 22:20:59,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47914032869785084 [2023-08-31 22:20:59,444 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1137 transitions. [2023-08-31 22:20:59,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1137 transitions. [2023-08-31 22:20:59,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:59,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1137 transitions. [2023-08-31 22:20:59,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 162.42857142857142) internal successors, (1137), 7 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:59,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 339.0) internal successors, (2712), 8 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:59,464 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 339.0) internal successors, (2712), 8 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:59,464 INFO L175 Difference]: Start difference. First operand has 77 places, 62 transitions, 328 flow. Second operand 7 states and 1137 transitions. [2023-08-31 22:20:59,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 97 transitions, 667 flow [2023-08-31 22:20:59,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 97 transitions, 657 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-31 22:20:59,475 INFO L231 Difference]: Finished difference. Result has 81 places, 65 transitions, 369 flow [2023-08-31 22:20:59,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=369, PETRI_PLACES=81, PETRI_TRANSITIONS=65} [2023-08-31 22:20:59,476 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 32 predicate places. [2023-08-31 22:20:59,477 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 65 transitions, 369 flow [2023-08-31 22:20:59,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 155.33333333333334) internal successors, (932), 6 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:59,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:59,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:20:59,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 22:20:59,478 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:59,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:59,478 INFO L85 PathProgramCache]: Analyzing trace with hash -365350266, now seen corresponding path program 1 times [2023-08-31 22:20:59,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:59,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856280549] [2023-08-31 22:20:59,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:59,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:59,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:20:59,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:59,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856280549] [2023-08-31 22:20:59,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856280549] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:59,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:59,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:20:59,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761449219] [2023-08-31 22:20:59,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:59,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:20:59,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:59,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:20:59,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:20:59,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 339 [2023-08-31 22:20:59,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 65 transitions, 369 flow. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:59,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:59,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 339 [2023-08-31 22:20:59,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:59,828 INFO L130 PetriNetUnfolder]: 1115/2098 cut-off events. [2023-08-31 22:20:59,829 INFO L131 PetriNetUnfolder]: For 1660/1660 co-relation queries the response was YES. [2023-08-31 22:20:59,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6282 conditions, 2098 events. 1115/2098 cut-off events. For 1660/1660 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10704 event pairs, 662 based on Foata normal form. 84/2146 useless extension candidates. Maximal degree in co-relation 6257. Up to 1548 conditions per place. [2023-08-31 22:20:59,843 INFO L137 encePairwiseOnDemand]: 335/339 looper letters, 107 selfloop transitions, 3 changer transitions 0/111 dead transitions. [2023-08-31 22:20:59,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 111 transitions, 852 flow [2023-08-31 22:20:59,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:20:59,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:20:59,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 542 transitions. [2023-08-31 22:20:59,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5329400196656834 [2023-08-31 22:20:59,846 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 542 transitions. [2023-08-31 22:20:59,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 542 transitions. [2023-08-31 22:20:59,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:59,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 542 transitions. [2023-08-31 22:20:59,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:59,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:59,849 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:59,850 INFO L175 Difference]: Start difference. First operand has 81 places, 65 transitions, 369 flow. Second operand 3 states and 542 transitions. [2023-08-31 22:20:59,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 111 transitions, 852 flow [2023-08-31 22:20:59,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 111 transitions, 840 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-31 22:20:59,858 INFO L231 Difference]: Finished difference. Result has 82 places, 67 transitions, 383 flow [2023-08-31 22:20:59,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=383, PETRI_PLACES=82, PETRI_TRANSITIONS=67} [2023-08-31 22:20:59,860 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 33 predicate places. [2023-08-31 22:20:59,860 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 383 flow [2023-08-31 22:20:59,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:20:59,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:59,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:20:59,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-31 22:20:59,861 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:20:59,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:59,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1608419276, now seen corresponding path program 1 times [2023-08-31 22:20:59,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:59,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792631874] [2023-08-31 22:20:59,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:59,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:00,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:00,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:00,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792631874] [2023-08-31 22:21:00,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792631874] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:00,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:00,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-31 22:21:00,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037739878] [2023-08-31 22:21:00,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:00,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 22:21:00,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:00,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 22:21:00,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-08-31 22:21:01,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 339 [2023-08-31 22:21:01,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 67 transitions, 383 flow. Second operand has 15 states, 15 states have (on average 128.46666666666667) internal successors, (1927), 15 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:01,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:01,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 339 [2023-08-31 22:21:01,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:02,919 INFO L130 PetriNetUnfolder]: 1418/2685 cut-off events. [2023-08-31 22:21:02,920 INFO L131 PetriNetUnfolder]: For 2255/2255 co-relation queries the response was YES. [2023-08-31 22:21:02,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8443 conditions, 2685 events. 1418/2685 cut-off events. For 2255/2255 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 14483 event pairs, 338 based on Foata normal form. 12/2697 useless extension candidates. Maximal degree in co-relation 8417. Up to 1907 conditions per place. [2023-08-31 22:21:02,938 INFO L137 encePairwiseOnDemand]: 322/339 looper letters, 144 selfloop transitions, 31 changer transitions 0/176 dead transitions. [2023-08-31 22:21:02,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 176 transitions, 1183 flow [2023-08-31 22:21:02,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 22:21:02,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 22:21:02,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2433 transitions. [2023-08-31 22:21:02,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39872173058013766 [2023-08-31 22:21:02,947 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2433 transitions. [2023-08-31 22:21:02,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2433 transitions. [2023-08-31 22:21:02,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:02,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2433 transitions. [2023-08-31 22:21:02,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 135.16666666666666) internal successors, (2433), 18 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) [2023-08-31 22:21:02,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 339.0) internal successors, (6441), 19 states have internal predecessors, (6441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:02,963 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 339.0) internal successors, (6441), 19 states have internal predecessors, (6441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:02,964 INFO L175 Difference]: Start difference. First operand has 82 places, 67 transitions, 383 flow. Second operand 18 states and 2433 transitions. [2023-08-31 22:21:02,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 176 transitions, 1183 flow [2023-08-31 22:21:02,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 176 transitions, 1170 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:21:02,975 INFO L231 Difference]: Finished difference. Result has 106 places, 92 transitions, 628 flow [2023-08-31 22:21:02,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=628, PETRI_PLACES=106, PETRI_TRANSITIONS=92} [2023-08-31 22:21:02,976 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 57 predicate places. [2023-08-31 22:21:02,976 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 92 transitions, 628 flow [2023-08-31 22:21:02,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 128.46666666666667) internal successors, (1927), 15 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:02,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:02,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:02,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 22:21:02,977 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:02,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:02,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1883421570, now seen corresponding path program 2 times [2023-08-31 22:21:02,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:02,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216801650] [2023-08-31 22:21:02,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:02,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:03,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:03,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:03,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:03,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216801650] [2023-08-31 22:21:03,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216801650] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:03,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:03,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-31 22:21:03,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543039452] [2023-08-31 22:21:03,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:03,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 22:21:03,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:03,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 22:21:03,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2023-08-31 22:21:05,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 339 [2023-08-31 22:21:05,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 92 transitions, 628 flow. Second operand has 16 states, 16 states have (on average 124.375) internal successors, (1990), 16 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:05,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:05,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 339 [2023-08-31 22:21:05,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:06,384 INFO L130 PetriNetUnfolder]: 1711/3242 cut-off events. [2023-08-31 22:21:06,385 INFO L131 PetriNetUnfolder]: For 3166/3166 co-relation queries the response was YES. [2023-08-31 22:21:06,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10823 conditions, 3242 events. 1711/3242 cut-off events. For 3166/3166 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 18363 event pairs, 449 based on Foata normal form. 12/3254 useless extension candidates. Maximal degree in co-relation 10789. Up to 1937 conditions per place. [2023-08-31 22:21:06,407 INFO L137 encePairwiseOnDemand]: 322/339 looper letters, 143 selfloop transitions, 40 changer transitions 0/184 dead transitions. [2023-08-31 22:21:06,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 184 transitions, 1387 flow [2023-08-31 22:21:06,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 22:21:06,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 22:21:06,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1858 transitions. [2023-08-31 22:21:06,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3914875684787189 [2023-08-31 22:21:06,413 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1858 transitions. [2023-08-31 22:21:06,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1858 transitions. [2023-08-31 22:21:06,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:06,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1858 transitions. [2023-08-31 22:21:06,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 132.71428571428572) internal successors, (1858), 14 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:06,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 339.0) internal successors, (5085), 15 states have internal predecessors, (5085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:06,424 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 339.0) internal successors, (5085), 15 states have internal predecessors, (5085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:06,424 INFO L175 Difference]: Start difference. First operand has 106 places, 92 transitions, 628 flow. Second operand 14 states and 1858 transitions. [2023-08-31 22:21:06,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 184 transitions, 1387 flow [2023-08-31 22:21:06,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 184 transitions, 1362 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-31 22:21:06,441 INFO L231 Difference]: Finished difference. Result has 122 places, 105 transitions, 851 flow [2023-08-31 22:21:06,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=851, PETRI_PLACES=122, PETRI_TRANSITIONS=105} [2023-08-31 22:21:06,442 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 73 predicate places. [2023-08-31 22:21:06,442 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 105 transitions, 851 flow [2023-08-31 22:21:06,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 124.375) internal successors, (1990), 16 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:06,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:06,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:06,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 22:21:06,443 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:06,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:06,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1987752546, now seen corresponding path program 3 times [2023-08-31 22:21:06,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:06,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108516923] [2023-08-31 22:21:06,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:06,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:06,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:07,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:07,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108516923] [2023-08-31 22:21:07,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108516923] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:07,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:07,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-31 22:21:07,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120949994] [2023-08-31 22:21:07,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:07,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 22:21:07,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:07,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 22:21:07,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2023-08-31 22:21:08,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 339 [2023-08-31 22:21:08,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 105 transitions, 851 flow. Second operand has 16 states, 16 states have (on average 125.375) internal successors, (2006), 16 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:08,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:08,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 339 [2023-08-31 22:21:08,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:09,347 INFO L130 PetriNetUnfolder]: 1699/3219 cut-off events. [2023-08-31 22:21:09,347 INFO L131 PetriNetUnfolder]: For 4161/4161 co-relation queries the response was YES. [2023-08-31 22:21:09,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11438 conditions, 3219 events. 1699/3219 cut-off events. For 4161/4161 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 18158 event pairs, 385 based on Foata normal form. 12/3231 useless extension candidates. Maximal degree in co-relation 11397. Up to 1403 conditions per place. [2023-08-31 22:21:09,375 INFO L137 encePairwiseOnDemand]: 322/339 looper letters, 132 selfloop transitions, 53 changer transitions 0/186 dead transitions. [2023-08-31 22:21:09,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 186 transitions, 1532 flow [2023-08-31 22:21:09,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 22:21:09,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 22:21:09,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1996 transitions. [2023-08-31 22:21:09,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925270403146509 [2023-08-31 22:21:09,380 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1996 transitions. [2023-08-31 22:21:09,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1996 transitions. [2023-08-31 22:21:09,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:09,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1996 transitions. [2023-08-31 22:21:09,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 133.06666666666666) internal successors, (1996), 15 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:09,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 339.0) internal successors, (5424), 16 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:09,391 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 339.0) internal successors, (5424), 16 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:09,391 INFO L175 Difference]: Start difference. First operand has 122 places, 105 transitions, 851 flow. Second operand 15 states and 1996 transitions. [2023-08-31 22:21:09,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 186 transitions, 1532 flow [2023-08-31 22:21:09,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 186 transitions, 1477 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-08-31 22:21:09,416 INFO L231 Difference]: Finished difference. Result has 135 places, 112 transitions, 1011 flow [2023-08-31 22:21:09,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1011, PETRI_PLACES=135, PETRI_TRANSITIONS=112} [2023-08-31 22:21:09,417 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 86 predicate places. [2023-08-31 22:21:09,417 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 112 transitions, 1011 flow [2023-08-31 22:21:09,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 125.375) internal successors, (2006), 16 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:09,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:09,418 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 22:21:09,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 22:21:09,419 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:09,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:09,419 INFO L85 PathProgramCache]: Analyzing trace with hash 863120243, now seen corresponding path program 1 times [2023-08-31 22:21:09,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:09,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070931323] [2023-08-31 22:21:09,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:09,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:09,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:09,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070931323] [2023-08-31 22:21:09,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070931323] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:21:09,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12656861] [2023-08-31 22:21:09,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:09,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:21:09,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:21:09,501 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) [2023-08-31 22:21:09,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 22:21:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:09,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 22:21:09,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:09,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:21:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:09,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12656861] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:21:09,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:21:09,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-31 22:21:09,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283554110] [2023-08-31 22:21:09,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:21:09,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 22:21:09,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:09,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 22:21:09,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-31 22:21:09,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 339 [2023-08-31 22:21:09,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 112 transitions, 1011 flow. Second operand has 14 states, 14 states have (on average 159.71428571428572) internal successors, (2236), 14 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:09,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:09,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 339 [2023-08-31 22:21:09,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:10,663 INFO L130 PetriNetUnfolder]: 2454/4656 cut-off events. [2023-08-31 22:21:10,664 INFO L131 PetriNetUnfolder]: For 6794/6794 co-relation queries the response was YES. [2023-08-31 22:21:10,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16656 conditions, 4656 events. 2454/4656 cut-off events. For 6794/6794 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 25062 event pairs, 665 based on Foata normal form. 54/4710 useless extension candidates. Maximal degree in co-relation 16610. Up to 1655 conditions per place. [2023-08-31 22:21:10,746 INFO L137 encePairwiseOnDemand]: 333/339 looper letters, 239 selfloop transitions, 40 changer transitions 0/280 dead transitions. [2023-08-31 22:21:10,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 280 transitions, 2427 flow [2023-08-31 22:21:10,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 22:21:10,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 22:21:10,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1907 transitions. [2023-08-31 22:21:10,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113971574148566 [2023-08-31 22:21:10,751 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1907 transitions. [2023-08-31 22:21:10,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1907 transitions. [2023-08-31 22:21:10,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:10,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1907 transitions. [2023-08-31 22:21:10,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 173.36363636363637) internal successors, (1907), 11 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:10,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 339.0) internal successors, (4068), 12 states have internal predecessors, (4068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:10,760 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 339.0) internal successors, (4068), 12 states have internal predecessors, (4068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:10,760 INFO L175 Difference]: Start difference. First operand has 135 places, 112 transitions, 1011 flow. Second operand 11 states and 1907 transitions. [2023-08-31 22:21:10,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 280 transitions, 2427 flow [2023-08-31 22:21:10,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 280 transitions, 2352 flow, removed 14 selfloop flow, removed 9 redundant places. [2023-08-31 22:21:10,798 INFO L231 Difference]: Finished difference. Result has 141 places, 137 transitions, 1282 flow [2023-08-31 22:21:10,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1282, PETRI_PLACES=141, PETRI_TRANSITIONS=137} [2023-08-31 22:21:10,799 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 92 predicate places. [2023-08-31 22:21:10,799 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 137 transitions, 1282 flow [2023-08-31 22:21:10,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 159.71428571428572) internal successors, (2236), 14 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:10,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:10,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:10,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-31 22:21:11,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:21:11,007 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:11,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:11,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1532241505, now seen corresponding path program 1 times [2023-08-31 22:21:11,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:11,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017787] [2023-08-31 22:21:11,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:11,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:11,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:11,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017787] [2023-08-31 22:21:11,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017787] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:21:11,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254976462] [2023-08-31 22:21:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:11,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:21:11,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:21:11,059 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) [2023-08-31 22:21:11,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 22:21:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:11,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 22:21:11,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:11,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:11,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:21:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:11,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254976462] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:21:11,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:21:11,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-31 22:21:11,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872683574] [2023-08-31 22:21:11,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:21:11,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 22:21:11,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:11,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 22:21:11,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 22:21:11,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 339 [2023-08-31 22:21:11,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 137 transitions, 1282 flow. Second operand has 7 states, 7 states have (on average 163.14285714285714) internal successors, (1142), 7 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:11,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:11,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 339 [2023-08-31 22:21:11,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:12,579 INFO L130 PetriNetUnfolder]: 4799/9383 cut-off events. [2023-08-31 22:21:12,580 INFO L131 PetriNetUnfolder]: For 17714/17714 co-relation queries the response was YES. [2023-08-31 22:21:12,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34589 conditions, 9383 events. 4799/9383 cut-off events. For 17714/17714 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 62567 event pairs, 1181 based on Foata normal form. 1218/10601 useless extension candidates. Maximal degree in co-relation 34537. Up to 2316 conditions per place. [2023-08-31 22:21:12,713 INFO L137 encePairwiseOnDemand]: 334/339 looper letters, 455 selfloop transitions, 22 changer transitions 0/478 dead transitions. [2023-08-31 22:21:12,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 478 transitions, 5496 flow [2023-08-31 22:21:12,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 22:21:12,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 22:21:12,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1088 transitions. [2023-08-31 22:21:12,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349065880039331 [2023-08-31 22:21:12,716 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1088 transitions. [2023-08-31 22:21:12,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1088 transitions. [2023-08-31 22:21:12,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:12,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1088 transitions. [2023-08-31 22:21:12,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 181.33333333333334) internal successors, (1088), 6 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:12,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 339.0) internal successors, (2373), 7 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:12,723 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 339.0) internal successors, (2373), 7 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:12,723 INFO L175 Difference]: Start difference. First operand has 141 places, 137 transitions, 1282 flow. Second operand 6 states and 1088 transitions. [2023-08-31 22:21:12,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 478 transitions, 5496 flow [2023-08-31 22:21:12,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 478 transitions, 5290 flow, removed 103 selfloop flow, removed 0 redundant places. [2023-08-31 22:21:12,847 INFO L231 Difference]: Finished difference. Result has 150 places, 148 transitions, 1433 flow [2023-08-31 22:21:12,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1433, PETRI_PLACES=150, PETRI_TRANSITIONS=148} [2023-08-31 22:21:12,848 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 101 predicate places. [2023-08-31 22:21:12,849 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 148 transitions, 1433 flow [2023-08-31 22:21:12,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 163.14285714285714) internal successors, (1142), 7 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:12,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:12,849 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:12,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-31 22:21:13,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:21:13,055 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:13,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:13,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1765816214, now seen corresponding path program 1 times [2023-08-31 22:21:13,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:13,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036084151] [2023-08-31 22:21:13,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:13,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:13,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:13,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:13,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036084151] [2023-08-31 22:21:13,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036084151] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:21:13,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248464324] [2023-08-31 22:21:13,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:13,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:21:13,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:21:13,361 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) [2023-08-31 22:21:13,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 22:21:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:13,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 22:21:13,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:13,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:13,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:21:14,084 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 22:21:14,084 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 29 treesize of output 33 [2023-08-31 22:21:14,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:14,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248464324] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:21:14,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:21:14,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 26 [2023-08-31 22:21:14,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238785700] [2023-08-31 22:21:14,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:21:14,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 22:21:14,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:14,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 22:21:14,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2023-08-31 22:21:15,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 339 [2023-08-31 22:21:15,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 148 transitions, 1433 flow. Second operand has 28 states, 28 states have (on average 140.67857142857142) internal successors, (3939), 28 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:15,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:15,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 339 [2023-08-31 22:21:15,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:19,653 INFO L130 PetriNetUnfolder]: 5668/11194 cut-off events. [2023-08-31 22:21:19,653 INFO L131 PetriNetUnfolder]: For 27513/27513 co-relation queries the response was YES. [2023-08-31 22:21:19,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43337 conditions, 11194 events. 5668/11194 cut-off events. For 27513/27513 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 75941 event pairs, 577 based on Foata normal form. 322/11516 useless extension candidates. Maximal degree in co-relation 43281. Up to 2611 conditions per place. [2023-08-31 22:21:19,741 INFO L137 encePairwiseOnDemand]: 324/339 looper letters, 319 selfloop transitions, 107 changer transitions 0/427 dead transitions. [2023-08-31 22:21:19,742 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 427 transitions, 3893 flow [2023-08-31 22:21:19,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-31 22:21:19,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-31 22:21:19,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4706 transitions. [2023-08-31 22:21:19,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4338126843657817 [2023-08-31 22:21:19,748 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4706 transitions. [2023-08-31 22:21:19,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4706 transitions. [2023-08-31 22:21:19,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:19,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4706 transitions. [2023-08-31 22:21:19,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 147.0625) internal successors, (4706), 32 states have internal predecessors, (4706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:19,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 339.0) internal successors, (11187), 33 states have internal predecessors, (11187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:19,769 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 339.0) internal successors, (11187), 33 states have internal predecessors, (11187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:19,769 INFO L175 Difference]: Start difference. First operand has 150 places, 148 transitions, 1433 flow. Second operand 32 states and 4706 transitions. [2023-08-31 22:21:19,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 427 transitions, 3893 flow [2023-08-31 22:21:19,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 427 transitions, 3785 flow, removed 47 selfloop flow, removed 1 redundant places. [2023-08-31 22:21:19,880 INFO L231 Difference]: Finished difference. Result has 197 places, 202 transitions, 2231 flow [2023-08-31 22:21:19,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2231, PETRI_PLACES=197, PETRI_TRANSITIONS=202} [2023-08-31 22:21:19,881 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 148 predicate places. [2023-08-31 22:21:19,881 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 202 transitions, 2231 flow [2023-08-31 22:21:19,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 140.67857142857142) internal successors, (3939), 28 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:19,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:19,882 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:19,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 22:21:20,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:21:20,088 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:20,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:20,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1066183258, now seen corresponding path program 1 times [2023-08-31 22:21:20,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:20,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519263580] [2023-08-31 22:21:20,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:20,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:20,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:20,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:20,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519263580] [2023-08-31 22:21:20,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519263580] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:21:20,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980971423] [2023-08-31 22:21:20,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:20,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:21:20,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:21:20,182 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) [2023-08-31 22:21:20,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 22:21:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:20,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 22:21:20,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:20,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 22:21:20,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:20,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980971423] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:20,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 22:21:20,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-08-31 22:21:20,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429879596] [2023-08-31 22:21:20,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:20,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:21:20,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:20,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:21:20,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-31 22:21:20,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 339 [2023-08-31 22:21:20,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 202 transitions, 2231 flow. Second operand has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:20,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:20,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 339 [2023-08-31 22:21:20,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:22,648 INFO L130 PetriNetUnfolder]: 5972/11823 cut-off events. [2023-08-31 22:21:22,648 INFO L131 PetriNetUnfolder]: For 42852/42852 co-relation queries the response was YES. [2023-08-31 22:21:22,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50920 conditions, 11823 events. 5972/11823 cut-off events. For 42852/42852 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 80704 event pairs, 1888 based on Foata normal form. 64/11887 useless extension candidates. Maximal degree in co-relation 50846. Up to 5949 conditions per place. [2023-08-31 22:21:22,749 INFO L137 encePairwiseOnDemand]: 332/339 looper letters, 247 selfloop transitions, 45 changer transitions 0/293 dead transitions. [2023-08-31 22:21:22,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 293 transitions, 3430 flow [2023-08-31 22:21:22,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 22:21:22,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 22:21:22,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1177 transitions. [2023-08-31 22:21:22,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49599662873999156 [2023-08-31 22:21:22,751 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1177 transitions. [2023-08-31 22:21:22,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1177 transitions. [2023-08-31 22:21:22,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:22,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1177 transitions. [2023-08-31 22:21:22,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 168.14285714285714) internal successors, (1177), 7 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:22,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 339.0) internal successors, (2712), 8 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:22,756 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 339.0) internal successors, (2712), 8 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:22,756 INFO L175 Difference]: Start difference. First operand has 197 places, 202 transitions, 2231 flow. Second operand 7 states and 1177 transitions. [2023-08-31 22:21:22,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 293 transitions, 3430 flow [2023-08-31 22:21:22,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 293 transitions, 3203 flow, removed 112 selfloop flow, removed 2 redundant places. [2023-08-31 22:21:22,946 INFO L231 Difference]: Finished difference. Result has 206 places, 210 transitions, 2332 flow [2023-08-31 22:21:22,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=1984, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2332, PETRI_PLACES=206, PETRI_TRANSITIONS=210} [2023-08-31 22:21:22,947 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 157 predicate places. [2023-08-31 22:21:22,947 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 210 transitions, 2332 flow [2023-08-31 22:21:22,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:22,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:22,947 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:22,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-31 22:21:23,148 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,SelfDestructingSolverStorable21 [2023-08-31 22:21:23,148 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:23,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:23,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1306320960, now seen corresponding path program 1 times [2023-08-31 22:21:23,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:23,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258399944] [2023-08-31 22:21:23,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:23,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:21:23,169 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:21:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:21:23,209 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:21:23,210 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:21:23,211 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2023-08-31 22:21:23,212 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2023-08-31 22:21:23,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-08-31 22:21:23,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-08-31 22:21:23,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-08-31 22:21:23,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2023-08-31 22:21:23,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2023-08-31 22:21:23,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-08-31 22:21:23,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-08-31 22:21:23,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2023-08-31 22:21:23,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2023-08-31 22:21:23,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2023-08-31 22:21:23,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2023-08-31 22:21:23,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-08-31 22:21:23,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2023-08-31 22:21:23,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 23 remaining) [2023-08-31 22:21:23,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2023-08-31 22:21:23,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2023-08-31 22:21:23,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2023-08-31 22:21:23,216 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2023-08-31 22:21:23,216 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2023-08-31 22:21:23,216 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2023-08-31 22:21:23,216 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2023-08-31 22:21:23,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-31 22:21:23,217 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:23,222 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-31 22:21:23,222 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-31 22:21:23,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.08 10:21:23 BasicIcfg [2023-08-31 22:21:23,264 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-31 22:21:23,264 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-31 22:21:23,265 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-31 22:21:23,265 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-31 22:21:23,265 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:20:44" (3/4) ... [2023-08-31 22:21:23,267 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-31 22:21:23,267 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-31 22:21:23,268 INFO L158 Benchmark]: Toolchain (without parser) took 39597.11ms. Allocated memory was 100.7MB in the beginning and 1.5GB in the end (delta: 1.4GB). Free memory was 76.5MB in the beginning and 801.4MB in the end (delta: -725.0MB). Peak memory consumption was 635.0MB. Max. memory is 16.1GB. [2023-08-31 22:21:23,268 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 73.4MB. Free memory was 51.8MB in the beginning and 51.7MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 22:21:23,268 INFO L158 Benchmark]: CACSL2BoogieTranslator took 564.90ms. Allocated memory is still 100.7MB. Free memory was 76.5MB in the beginning and 47.3MB in the end (delta: 29.1MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2023-08-31 22:21:23,269 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.72ms. Allocated memory is still 100.7MB. Free memory was 47.3MB in the beginning and 44.6MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-31 22:21:23,269 INFO L158 Benchmark]: Boogie Preprocessor took 30.27ms. Allocated memory is still 100.7MB. Free memory was 44.6MB in the beginning and 42.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 22:21:23,269 INFO L158 Benchmark]: RCFGBuilder took 664.01ms. Allocated memory is still 100.7MB. Free memory was 42.5MB in the beginning and 63.4MB in the end (delta: -21.0MB). Peak memory consumption was 6.9MB. Max. memory is 16.1GB. [2023-08-31 22:21:23,269 INFO L158 Benchmark]: TraceAbstraction took 38283.04ms. Allocated memory was 100.7MB in the beginning and 1.5GB in the end (delta: 1.4GB). Free memory was 62.6MB in the beginning and 802.5MB in the end (delta: -739.9MB). Peak memory consumption was 617.6MB. Max. memory is 16.1GB. [2023-08-31 22:21:23,270 INFO L158 Benchmark]: Witness Printer took 3.00ms. Allocated memory is still 1.5GB. Free memory is still 801.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 22:21:23,271 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 73.4MB. Free memory was 51.8MB in the beginning and 51.7MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 564.90ms. Allocated memory is still 100.7MB. Free memory was 76.5MB in the beginning and 47.3MB in the end (delta: 29.1MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.72ms. Allocated memory is still 100.7MB. Free memory was 47.3MB in the beginning and 44.6MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.27ms. Allocated memory is still 100.7MB. Free memory was 44.6MB in the beginning and 42.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 664.01ms. Allocated memory is still 100.7MB. Free memory was 42.5MB in the beginning and 63.4MB in the end (delta: -21.0MB). Peak memory consumption was 6.9MB. Max. memory is 16.1GB. * TraceAbstraction took 38283.04ms. Allocated memory was 100.7MB in the beginning and 1.5GB in the end (delta: 1.4GB). Free memory was 62.6MB in the beginning and 802.5MB in the end (delta: -739.9MB). Peak memory consumption was 617.6MB. Max. memory is 16.1GB. * Witness Printer took 3.00ms. Allocated memory is still 1.5GB. Free memory is still 801.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.6s, 165 PlacesBefore, 49 PlacesAfterwards, 168 TransitionsBefore, 47 TransitionsAfterwards, 8718 CoEnabledTransitionPairs, 6 FixpointIterations, 41 TrivialSequentialCompositions, 98 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 21 ConcurrentYvCompositions, 5 ChoiceCompositions, 165 TotalNumberOfCompositions, 13763 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9423, independent: 9194, independent conditional: 0, independent unconditional: 9194, dependent: 229, dependent conditional: 0, dependent unconditional: 229, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4965, independent: 4910, independent conditional: 0, independent unconditional: 4910, dependent: 55, dependent conditional: 0, dependent unconditional: 55, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9423, independent: 4284, independent conditional: 0, independent unconditional: 4284, dependent: 174, dependent conditional: 0, dependent unconditional: 174, unknown: 4965, unknown conditional: 0, unknown unconditional: 4965] , Statistics on independence cache: Total cache size (in pairs): 283, Positive cache size: 262, Positive conditional cache size: 0, Positive unconditional cache size: 262, Negative cache size: 21, Negative conditional cache size: 0, Negative unconditional cache size: 21, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 940]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 940. Possible FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(400)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1019] 0 pthread_t id1, id2; [L1021] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=-2, top=0] [L988] 1 int i; [L989] 1 unsigned int tmp; [L990] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1022] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=-1, top=0] [L990] COND TRUE 1 i<(400) [L993] 1 tmp = __VERIFIER_nondet_uint() [L994] CALL 1 assume_abort_if_not(tmp < (400)) [L1004] 2 int i; [L1005] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L23] COND FALSE 1 !(!cond) [L994] RET 1 assume_abort_if_not(tmp < (400)) [L995] CALL, EXPR 1 push(arr,tmp) [L960] COND FALSE 1 !(top==(400)) [L967] CALL, EXPR 1 get_top() [L952] 1 return top; [L967] RET, EXPR 1 get_top() [L967] 1 stack[get_top()] = x [L968] CALL 1 inc_top() [L944] 1 top++ [L968] RET 1 inc_top() [L970] 1 return 0; [L995] RET, EXPR 1 push(arr,tmp) [L995] COND FALSE 1 !(push(arr,tmp)==(-1)) [L997] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=399, top=1] [L990] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=399, top=1] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND FALSE 2 !(get_top()==0) [L981] CALL 2 dec_top() [L948] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L981] RET 2 dec_top() [L982] CALL, EXPR 2 get_top() [L952] 2 return top; VAL [\result=0, \result=0, arr={3:0}, flag=1, m={4:0}, top=0] [L982] RET, EXPR 2 get_top() [L982] EXPR 2 stack[get_top()] [L982] 2 return stack[get_top()]; [L1010] RET, EXPR 2 pop(arr) [L1010] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1005] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND TRUE 2 get_top()==0 [L977] 2 return (-2); [L1010] RET, EXPR 2 pop(arr) [L1010] COND TRUE 2 !(pop(arr)!=(-2)) [L1011] CALL 2 error() [L940] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1017]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 940]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 270 locations, 23 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 38.1s, OverallIterations: 23, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 25.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6544 SdHoareTripleChecker+Valid, 12.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5705 mSDsluCounter, 11123 SdHoareTripleChecker+Invalid, 10.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10971 mSDsCounter, 207 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 26879 IncrementalHoareTripleChecker+Invalid, 27086 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 207 mSolverCounterUnsat, 152 mSDtfsCounter, 26879 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 388 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2332occurred in iteration=22, InterpolantAutomatonStates: 171, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 453 NumberOfCodeBlocks, 453 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 481 ConstructedInterpolants, 0 QuantifiedInterpolants, 4022 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1222 ConjunctsInSsa, 89 ConjunctsInUnsatCore, 31 InterpolantComputations, 18 PerfectInterpolantSequences, 18/73 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-08-31 22:21:23,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread/stack_longer-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 22:21:25,386 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 22:21:25,389 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 22:21:25,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 22:21:25,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 22:21:25,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 22:21:25,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 22:21:25,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 22:21:25,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 22:21:25,450 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 22:21:25,451 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 22:21:25,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 22:21:25,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 22:21:25,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 22:21:25,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 22:21:25,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 22:21:25,465 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 22:21:25,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 22:21:25,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 22:21:25,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 22:21:25,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 22:21:25,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 22:21:25,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 22:21:25,477 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 22:21:25,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 22:21:25,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 22:21:25,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 22:21:25,487 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 22:21:25,487 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 22:21:25,488 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 22:21:25,488 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 22:21:25,490 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 22:21:25,492 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 22:21:25,492 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 22:21:25,493 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 22:21:25,493 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 22:21:25,494 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 22:21:25,494 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 22:21:25,494 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 22:21:25,495 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 22:21:25,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 22:21:25,498 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-31 22:21:25,533 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 22:21:25,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 22:21:25,534 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 22:21:25,535 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 22:21:25,535 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 22:21:25,536 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 22:21:25,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 22:21:25,536 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 22:21:25,537 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 22:21:25,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 22:21:25,538 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 22:21:25,538 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 22:21:25,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 22:21:25,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 22:21:25,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 22:21:25,539 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-31 22:21:25,539 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-31 22:21:25,539 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-31 22:21:25,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 22:21:25,540 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-31 22:21:25,540 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-31 22:21:25,540 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-31 22:21:25,540 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 22:21:25,540 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 22:21:25,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 22:21:25,541 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 22:21:25,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 22:21:25,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:21:25,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 22:21:25,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 22:21:25,542 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-31 22:21:25,542 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-31 22:21:25,542 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 22:21:25,543 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 22:21:25,543 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 22:21:25,543 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-31 22:21:25,543 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 22:21:25,543 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 22:21:25,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 22:21:25,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 22:21:25,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 22:21:25,880 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 22:21:25,880 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 22:21:25,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-1.i [2023-08-31 22:21:27,187 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 22:21:27,453 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 22:21:27,453 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i [2023-08-31 22:21:27,469 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a842fdbe/7c25ba56928c44bf9ef5dfab3c6d9cdd/FLAG06fb74b92 [2023-08-31 22:21:27,484 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a842fdbe/7c25ba56928c44bf9ef5dfab3c6d9cdd [2023-08-31 22:21:27,486 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 22:21:27,487 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 22:21:27,488 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 22:21:27,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 22:21:27,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 22:21:27,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:21:27" (1/1) ... [2023-08-31 22:21:27,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@96e17f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:27, skipping insertion in model container [2023-08-31 22:21:27,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:21:27" (1/1) ... [2023-08-31 22:21:27,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 22:21:27,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 22:21:27,864 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i[41527,41540] [2023-08-31 22:21:27,904 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:21:27,922 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 22:21:27,973 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i[41527,41540] [2023-08-31 22:21:27,987 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:21:28,059 INFO L208 MainTranslator]: Completed translation [2023-08-31 22:21:28,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:28 WrapperNode [2023-08-31 22:21:28,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 22:21:28,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 22:21:28,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 22:21:28,062 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 22:21:28,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:28" (1/1) ... [2023-08-31 22:21:28,107 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:28" (1/1) ... [2023-08-31 22:21:28,130 INFO L138 Inliner]: procedures = 281, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 152 [2023-08-31 22:21:28,130 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 22:21:28,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 22:21:28,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 22:21:28,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 22:21:28,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:28" (1/1) ... [2023-08-31 22:21:28,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:28" (1/1) ... [2023-08-31 22:21:28,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:28" (1/1) ... [2023-08-31 22:21:28,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:28" (1/1) ... [2023-08-31 22:21:28,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:28" (1/1) ... [2023-08-31 22:21:28,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:28" (1/1) ... [2023-08-31 22:21:28,157 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:28" (1/1) ... [2023-08-31 22:21:28,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:28" (1/1) ... [2023-08-31 22:21:28,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 22:21:28,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 22:21:28,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 22:21:28,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 22:21:28,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:28" (1/1) ... [2023-08-31 22:21:28,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:21:28,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:21:28,198 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) [2023-08-31 22:21:28,206 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 [2023-08-31 22:21:28,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-31 22:21:28,237 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-31 22:21:28,237 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-31 22:21:28,237 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-31 22:21:28,238 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-31 22:21:28,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 22:21:28,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 22:21:28,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-31 22:21:28,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-31 22:21:28,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2023-08-31 22:21:28,239 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 22:21:28,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 22:21:28,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 22:21:28,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 22:21:28,241 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 22:21:28,429 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 22:21:28,430 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 22:21:28,756 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 22:21:28,768 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 22:21:28,768 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 22:21:28,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:21:28 BoogieIcfgContainer [2023-08-31 22:21:28,776 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 22:21:28,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 22:21:28,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 22:21:28,783 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 22:21:28,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 10:21:27" (1/3) ... [2023-08-31 22:21:28,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d6173ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:21:28, skipping insertion in model container [2023-08-31 22:21:28,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:21:28" (2/3) ... [2023-08-31 22:21:28,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d6173ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:21:28, skipping insertion in model container [2023-08-31 22:21:28,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:21:28" (3/3) ... [2023-08-31 22:21:28,787 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2023-08-31 22:21:28,803 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 22:21:28,803 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-31 22:21:28,803 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 22:21:28,939 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 22:21:28,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 170 transitions, 356 flow [2023-08-31 22:21:29,074 INFO L130 PetriNetUnfolder]: 10/168 cut-off events. [2023-08-31 22:21:29,075 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:21:29,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 10/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 424 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 121. Up to 3 conditions per place. [2023-08-31 22:21:29,083 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 170 transitions, 356 flow [2023-08-31 22:21:29,092 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 164 transitions, 340 flow [2023-08-31 22:21:29,096 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:21:29,116 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 164 transitions, 340 flow [2023-08-31 22:21:29,132 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 164 transitions, 340 flow [2023-08-31 22:21:29,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 164 transitions, 340 flow [2023-08-31 22:21:29,185 INFO L130 PetriNetUnfolder]: 10/164 cut-off events. [2023-08-31 22:21:29,185 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:21:29,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 164 events. 10/164 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 420 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 121. Up to 3 conditions per place. [2023-08-31 22:21:29,195 INFO L119 LiptonReduction]: Number of co-enabled transitions 8060 [2023-08-31 22:21:37,238 INFO L134 LiptonReduction]: Checked pairs total: 12918 [2023-08-31 22:21:37,238 INFO L136 LiptonReduction]: Total number of compositions: 160 [2023-08-31 22:21:37,251 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 22:21:37,257 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;@59bc26a6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:21:37,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-31 22:21:37,259 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-31 22:21:37,259 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:21:37,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:37,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-31 22:21:37,260 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:37,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:37,264 INFO L85 PathProgramCache]: Analyzing trace with hash 689, now seen corresponding path program 1 times [2023-08-31 22:21:37,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:37,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206019584] [2023-08-31 22:21:37,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:37,273 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:37,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:37,285 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:21:37,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-31 22:21:37,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:37,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2023-08-31 22:21:37,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:37,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:37,366 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:37,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206019584] [2023-08-31 22:21:37,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206019584] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:37,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:37,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-31 22:21:37,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319881994] [2023-08-31 22:21:37,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:37,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-31 22:21:37,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:37,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-31 22:21:37,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-31 22:21:37,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 330 [2023-08-31 22:21:37,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 159.5) internal successors, (319), 2 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:37,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:37,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 330 [2023-08-31 22:21:37,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:37,776 INFO L130 PetriNetUnfolder]: 1353/2144 cut-off events. [2023-08-31 22:21:37,777 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 22:21:37,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4268 conditions, 2144 events. 1353/2144 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10238 event pairs, 1085 based on Foata normal form. 0/1234 useless extension candidates. Maximal degree in co-relation 4016. Up to 2081 conditions per place. [2023-08-31 22:21:37,790 INFO L137 encePairwiseOnDemand]: 328/330 looper letters, 43 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2023-08-31 22:21:37,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 188 flow [2023-08-31 22:21:37,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-31 22:21:37,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-31 22:21:37,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 363 transitions. [2023-08-31 22:21:37,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2023-08-31 22:21:37,812 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 363 transitions. [2023-08-31 22:21:37,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 363 transitions. [2023-08-31 22:21:37,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:37,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 363 transitions. [2023-08-31 22:21:37,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 181.5) internal successors, (363), 2 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:37,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 330.0) internal successors, (990), 3 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:37,828 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 330.0) internal successors, (990), 3 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:37,830 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 2 states and 363 transitions. [2023-08-31 22:21:37,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 188 flow [2023-08-31 22:21:37,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 180 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 22:21:37,837 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 94 flow [2023-08-31 22:21:37,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-08-31 22:21:37,843 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-31 22:21:37,846 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 94 flow [2023-08-31 22:21:37,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 159.5) internal successors, (319), 2 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:37,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:37,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:21:37,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-31 22:21:38,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:38,056 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:38,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:38,058 INFO L85 PathProgramCache]: Analyzing trace with hash 680063, now seen corresponding path program 1 times [2023-08-31 22:21:38,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:38,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357233031] [2023-08-31 22:21:38,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:38,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:38,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:38,066 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:21:38,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-31 22:21:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:38,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 22:21:38,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:38,220 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-31 22:21:38,222 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 1 case distinctions, treesize of input 9 treesize of output 19 [2023-08-31 22:21:38,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:38,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:38,237 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:38,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357233031] [2023-08-31 22:21:38,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1357233031] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:38,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:38,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:21:38,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347424953] [2023-08-31 22:21:38,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:38,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:38,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:38,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:38,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:38,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 330 [2023-08-31 22:21:38,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:38,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:38,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 330 [2023-08-31 22:21:38,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:38,536 INFO L130 PetriNetUnfolder]: 1325/2090 cut-off events. [2023-08-31 22:21:38,536 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-31 22:21:38,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4133 conditions, 2090 events. 1325/2090 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9855 event pairs, 1062 based on Foata normal form. 0/1215 useless extension candidates. Maximal degree in co-relation 4130. Up to 2026 conditions per place. [2023-08-31 22:21:38,555 INFO L137 encePairwiseOnDemand]: 326/330 looper letters, 39 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-08-31 22:21:38,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 172 flow [2023-08-31 22:21:38,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:38,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:38,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2023-08-31 22:21:38,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49797979797979797 [2023-08-31 22:21:38,558 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2023-08-31 22:21:38,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2023-08-31 22:21:38,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:38,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2023-08-31 22:21:38,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:38,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:38,563 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:38,563 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 94 flow. Second operand 3 states and 493 transitions. [2023-08-31 22:21:38,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 172 flow [2023-08-31 22:21:38,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 22:21:38,565 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 94 flow [2023-08-31 22:21:38,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-08-31 22:21:38,566 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-31 22:21:38,566 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 94 flow [2023-08-31 22:21:38,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:38,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:38,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:21:38,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-31 22:21:38,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:38,777 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:38,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:38,777 INFO L85 PathProgramCache]: Analyzing trace with hash 680062, now seen corresponding path program 1 times [2023-08-31 22:21:38,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:38,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728503101] [2023-08-31 22:21:38,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:38,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:38,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:38,783 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:21:38,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-31 22:21:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:38,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 22:21:38,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:38,874 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-31 22:21:38,875 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-08-31 22:21:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:38,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:38,891 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:38,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728503101] [2023-08-31 22:21:38,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1728503101] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:38,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:38,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:21:38,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358423257] [2023-08-31 22:21:38,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:38,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:38,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:38,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:38,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:38,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 330 [2023-08-31 22:21:38,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:38,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:38,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 330 [2023-08-31 22:21:38,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:39,257 INFO L130 PetriNetUnfolder]: 1297/2036 cut-off events. [2023-08-31 22:21:39,257 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-31 22:21:39,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4029 conditions, 2036 events. 1297/2036 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9523 event pairs, 1039 based on Foata normal form. 0/1196 useless extension candidates. Maximal degree in co-relation 4025. Up to 1973 conditions per place. [2023-08-31 22:21:39,267 INFO L137 encePairwiseOnDemand]: 326/330 looper letters, 37 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-31 22:21:39,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 168 flow [2023-08-31 22:21:39,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:39,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:39,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-08-31 22:21:39,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5080808080808081 [2023-08-31 22:21:39,270 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-08-31 22:21:39,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-08-31 22:21:39,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:39,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-08-31 22:21:39,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:39,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:39,275 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:39,275 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 94 flow. Second operand 3 states and 503 transitions. [2023-08-31 22:21:39,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 168 flow [2023-08-31 22:21:39,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:21:39,277 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 90 flow [2023-08-31 22:21:39,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-08-31 22:21:39,281 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-08-31 22:21:39,281 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 90 flow [2023-08-31 22:21:39,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:39,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:39,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 22:21:39,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-31 22:21:39,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:39,483 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:39,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:39,484 INFO L85 PathProgramCache]: Analyzing trace with hash 653554661, now seen corresponding path program 1 times [2023-08-31 22:21:39,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:39,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895779080] [2023-08-31 22:21:39,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:39,484 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:39,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:39,485 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:21:39,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-31 22:21:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:39,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 22:21:39,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:39,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:21:39,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-08-31 22:21:39,612 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 10 treesize of output 8 [2023-08-31 22:21:39,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:39,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:39,651 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:39,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895779080] [2023-08-31 22:21:39,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895779080] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:39,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:39,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:21:39,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556805537] [2023-08-31 22:21:39,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:39,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:39,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:39,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:39,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:39,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 330 [2023-08-31 22:21:39,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:39,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:39,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 330 [2023-08-31 22:21:39,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:39,906 INFO L130 PetriNetUnfolder]: 948/1516 cut-off events. [2023-08-31 22:21:39,907 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-31 22:21:39,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3004 conditions, 1516 events. 948/1516 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6799 event pairs, 752 based on Foata normal form. 0/959 useless extension candidates. Maximal degree in co-relation 3000. Up to 1468 conditions per place. [2023-08-31 22:21:39,914 INFO L137 encePairwiseOnDemand]: 327/330 looper letters, 36 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-31 22:21:39,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 164 flow [2023-08-31 22:21:39,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:39,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:39,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2023-08-31 22:21:39,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060606060606061 [2023-08-31 22:21:39,916 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2023-08-31 22:21:39,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2023-08-31 22:21:39,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:39,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2023-08-31 22:21:39,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:39,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:39,921 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:39,921 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 90 flow. Second operand 3 states and 501 transitions. [2023-08-31 22:21:39,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 164 flow [2023-08-31 22:21:39,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:21:39,922 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2023-08-31 22:21:39,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-08-31 22:21:39,924 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -8 predicate places. [2023-08-31 22:21:39,924 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2023-08-31 22:21:39,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:39,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:39,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 22:21:39,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-31 22:21:40,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:40,134 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:40,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:40,134 INFO L85 PathProgramCache]: Analyzing trace with hash 653554660, now seen corresponding path program 1 times [2023-08-31 22:21:40,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:40,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695445725] [2023-08-31 22:21:40,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:40,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:40,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:40,136 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:21:40,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-31 22:21:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:40,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-31 22:21:40,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:40,236 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-31 22:21:40,237 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 19 treesize of output 22 [2023-08-31 22:21:40,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:40,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:40,251 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:40,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695445725] [2023-08-31 22:21:40,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695445725] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:40,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:40,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:21:40,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685297656] [2023-08-31 22:21:40,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:40,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:40,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:40,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:40,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:40,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 330 [2023-08-31 22:21:40,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:40,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:40,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 330 [2023-08-31 22:21:40,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:40,461 INFO L130 PetriNetUnfolder]: 599/996 cut-off events. [2023-08-31 22:21:40,461 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-31 22:21:40,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1979 conditions, 996 events. 599/996 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4257 event pairs, 465 based on Foata normal form. 0/722 useless extension candidates. Maximal degree in co-relation 1975. Up to 963 conditions per place. [2023-08-31 22:21:40,465 INFO L137 encePairwiseOnDemand]: 327/330 looper letters, 35 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-31 22:21:40,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 160 flow [2023-08-31 22:21:40,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:40,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2023-08-31 22:21:40,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49292929292929294 [2023-08-31 22:21:40,468 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2023-08-31 22:21:40,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2023-08-31 22:21:40,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:40,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2023-08-31 22:21:40,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:40,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:40,471 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:40,472 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 488 transitions. [2023-08-31 22:21:40,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 160 flow [2023-08-31 22:21:40,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:21:40,473 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2023-08-31 22:21:40,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-08-31 22:21:40,474 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -9 predicate places. [2023-08-31 22:21:40,474 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2023-08-31 22:21:40,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:40,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:40,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 22:21:40,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-31 22:21:40,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:40,684 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:40,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:40,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1215172952, now seen corresponding path program 1 times [2023-08-31 22:21:40,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:40,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352750421] [2023-08-31 22:21:40,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:40,685 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:40,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:40,686 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:21:40,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-31 22:21:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:40,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-31 22:21:40,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:40,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:40,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:40,769 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:40,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352750421] [2023-08-31 22:21:40,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352750421] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:40,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:40,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:21:40,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606605901] [2023-08-31 22:21:40,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:40,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:40,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:40,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:40,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:40,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 330 [2023-08-31 22:21:40,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:40,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:40,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 330 [2023-08-31 22:21:40,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:40,999 INFO L130 PetriNetUnfolder]: 997/1662 cut-off events. [2023-08-31 22:21:41,000 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-31 22:21:41,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3296 conditions, 1662 events. 997/1662 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7578 event pairs, 282 based on Foata normal form. 0/1234 useless extension candidates. Maximal degree in co-relation 3292. Up to 974 conditions per place. [2023-08-31 22:21:41,008 INFO L137 encePairwiseOnDemand]: 325/330 looper letters, 63 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2023-08-31 22:21:41,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 69 transitions, 285 flow [2023-08-31 22:21:41,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:41,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:41,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-08-31 22:21:41,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5383838383838384 [2023-08-31 22:21:41,011 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-08-31 22:21:41,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-08-31 22:21:41,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:41,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-08-31 22:21:41,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:41,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:41,016 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:41,016 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 533 transitions. [2023-08-31 22:21:41,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 69 transitions, 285 flow [2023-08-31 22:21:41,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 69 transitions, 279 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:21:41,019 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 112 flow [2023-08-31 22:21:41,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2023-08-31 22:21:41,022 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-08-31 22:21:41,023 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 112 flow [2023-08-31 22:21:41,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:41,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:41,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 22:21:41,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-31 22:21:41,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:41,237 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:41,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:41,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1215174221, now seen corresponding path program 1 times [2023-08-31 22:21:41,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:41,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534851082] [2023-08-31 22:21:41,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:41,238 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:41,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:41,239 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:21:41,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-31 22:21:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:41,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 22:21:41,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:41,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:21:41,377 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-31 22:21:41,379 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 2 case distinctions, treesize of input 15 treesize of output 27 [2023-08-31 22:21:41,396 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-31 22:21:41,397 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 13 treesize of output 13 [2023-08-31 22:21:41,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:41,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:41,648 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:41,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534851082] [2023-08-31 22:21:41,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534851082] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:41,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:41,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:21:41,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060858934] [2023-08-31 22:21:41,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:41,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:21:41,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:41,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:21:41,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:21:42,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 330 [2023-08-31 22:21:42,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 153.2) internal successors, (766), 5 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:42,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:42,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 330 [2023-08-31 22:21:42,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:42,897 INFO L130 PetriNetUnfolder]: 1236/2073 cut-off events. [2023-08-31 22:21:42,897 INFO L131 PetriNetUnfolder]: For 322/322 co-relation queries the response was YES. [2023-08-31 22:21:42,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4425 conditions, 2073 events. 1236/2073 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 9769 event pairs, 234 based on Foata normal form. 0/1665 useless extension candidates. Maximal degree in co-relation 4420. Up to 1558 conditions per place. [2023-08-31 22:21:42,907 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 87 selfloop transitions, 7 changer transitions 0/96 dead transitions. [2023-08-31 22:21:42,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 96 transitions, 435 flow [2023-08-31 22:21:42,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 22:21:42,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 22:21:42,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 852 transitions. [2023-08-31 22:21:42,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163636363636364 [2023-08-31 22:21:42,910 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 852 transitions. [2023-08-31 22:21:42,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 852 transitions. [2023-08-31 22:21:42,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:42,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 852 transitions. [2023-08-31 22:21:42,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 170.4) internal successors, (852), 5 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:42,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 330.0) internal successors, (1980), 6 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:42,916 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 330.0) internal successors, (1980), 6 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:42,916 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 112 flow. Second operand 5 states and 852 transitions. [2023-08-31 22:21:42,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 96 transitions, 435 flow [2023-08-31 22:21:42,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 96 transitions, 419 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:21:42,919 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 157 flow [2023-08-31 22:21:42,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2023-08-31 22:21:42,920 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-08-31 22:21:42,920 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 157 flow [2023-08-31 22:21:42,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 153.2) internal successors, (766), 5 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:42,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:42,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 22:21:42,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-31 22:21:43,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:43,131 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:43,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:43,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1215174222, now seen corresponding path program 1 times [2023-08-31 22:21:43,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:43,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788251780] [2023-08-31 22:21:43,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:43,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:43,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:43,134 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:21:43,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-31 22:21:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:43,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 22:21:43,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:43,252 INFO L321 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2023-08-31 22:21:43,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 34 [2023-08-31 22:21:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:43,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:43,387 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:43,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788251780] [2023-08-31 22:21:43,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788251780] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:43,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:43,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:21:43,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384516965] [2023-08-31 22:21:43,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:43,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:21:43,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:43,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:21:43,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:21:43,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 330 [2023-08-31 22:21:43,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 153.2) internal successors, (766), 5 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:43,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:43,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 330 [2023-08-31 22:21:43,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:44,286 INFO L130 PetriNetUnfolder]: 1316/2209 cut-off events. [2023-08-31 22:21:44,286 INFO L131 PetriNetUnfolder]: For 458/458 co-relation queries the response was YES. [2023-08-31 22:21:44,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4976 conditions, 2209 events. 1316/2209 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 10820 event pairs, 380 based on Foata normal form. 0/1953 useless extension candidates. Maximal degree in co-relation 4968. Up to 1354 conditions per place. [2023-08-31 22:21:44,298 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 82 selfloop transitions, 9 changer transitions 0/93 dead transitions. [2023-08-31 22:21:44,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 93 transitions, 455 flow [2023-08-31 22:21:44,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 22:21:44,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 22:21:44,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 839 transitions. [2023-08-31 22:21:44,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5084848484848485 [2023-08-31 22:21:44,301 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 839 transitions. [2023-08-31 22:21:44,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 839 transitions. [2023-08-31 22:21:44,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:44,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 839 transitions. [2023-08-31 22:21:44,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 167.8) internal successors, (839), 5 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:44,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 330.0) internal successors, (1980), 6 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:44,306 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 330.0) internal successors, (1980), 6 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:44,306 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 157 flow. Second operand 5 states and 839 transitions. [2023-08-31 22:21:44,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 93 transitions, 455 flow [2023-08-31 22:21:44,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 93 transitions, 455 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 22:21:44,310 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 179 flow [2023-08-31 22:21:44,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2023-08-31 22:21:44,310 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2023-08-31 22:21:44,311 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 179 flow [2023-08-31 22:21:44,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 153.2) internal successors, (766), 5 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:44,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:44,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:44,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-31 22:21:44,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:44,521 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:44,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:44,521 INFO L85 PathProgramCache]: Analyzing trace with hash -293150869, now seen corresponding path program 1 times [2023-08-31 22:21:44,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:44,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070187525] [2023-08-31 22:21:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:44,521 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:44,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:44,522 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:21:44,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-31 22:21:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:44,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-31 22:21:44,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:44,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:44,603 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:44,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070187525] [2023-08-31 22:21:44,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070187525] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:44,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:44,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:21:44,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819115857] [2023-08-31 22:21:44,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:44,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:44,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:44,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:44,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:44,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 330 [2023-08-31 22:21:44,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:44,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:44,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 330 [2023-08-31 22:21:44,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:44,868 INFO L130 PetriNetUnfolder]: 1272/2113 cut-off events. [2023-08-31 22:21:44,868 INFO L131 PetriNetUnfolder]: For 766/766 co-relation queries the response was YES. [2023-08-31 22:21:44,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4937 conditions, 2113 events. 1272/2113 cut-off events. For 766/766 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9951 event pairs, 578 based on Foata normal form. 0/1809 useless extension candidates. Maximal degree in co-relation 4928. Up to 1371 conditions per place. [2023-08-31 22:21:44,886 INFO L137 encePairwiseOnDemand]: 326/330 looper letters, 65 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2023-08-31 22:21:44,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 69 transitions, 361 flow [2023-08-31 22:21:44,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:44,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:44,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 526 transitions. [2023-08-31 22:21:44,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5313131313131313 [2023-08-31 22:21:44,888 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 526 transitions. [2023-08-31 22:21:44,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 526 transitions. [2023-08-31 22:21:44,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:44,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 526 transitions. [2023-08-31 22:21:44,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:44,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:44,892 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:44,892 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 179 flow. Second operand 3 states and 526 transitions. [2023-08-31 22:21:44,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 69 transitions, 361 flow [2023-08-31 22:21:44,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 69 transitions, 337 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-31 22:21:44,895 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 156 flow [2023-08-31 22:21:44,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2023-08-31 22:21:44,896 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2023-08-31 22:21:44,897 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 156 flow [2023-08-31 22:21:44,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:44,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:44,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:44,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-31 22:21:45,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:45,107 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:45,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:45,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1674813696, now seen corresponding path program 1 times [2023-08-31 22:21:45,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:45,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437417175] [2023-08-31 22:21:45,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:45,108 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:45,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:45,109 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:21:45,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-31 22:21:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:45,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 22:21:45,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:45,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:45,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:45,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437417175] [2023-08-31 22:21:45,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437417175] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:45,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:45,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:21:45,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856629155] [2023-08-31 22:21:45,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:45,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:45,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:45,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:45,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:45,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 330 [2023-08-31 22:21:45,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:45,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:45,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 330 [2023-08-31 22:21:45,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:45,454 INFO L130 PetriNetUnfolder]: 1263/2135 cut-off events. [2023-08-31 22:21:45,454 INFO L131 PetriNetUnfolder]: For 495/495 co-relation queries the response was YES. [2023-08-31 22:21:45,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5006 conditions, 2135 events. 1263/2135 cut-off events. For 495/495 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10508 event pairs, 893 based on Foata normal form. 62/1983 useless extension candidates. Maximal degree in co-relation 4998. Up to 1875 conditions per place. [2023-08-31 22:21:45,464 INFO L137 encePairwiseOnDemand]: 327/330 looper letters, 61 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-08-31 22:21:45,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 69 transitions, 349 flow [2023-08-31 22:21:45,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:45,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:45,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2023-08-31 22:21:45,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5262626262626262 [2023-08-31 22:21:45,467 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2023-08-31 22:21:45,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2023-08-31 22:21:45,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:45,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2023-08-31 22:21:45,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:45,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:45,471 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:45,471 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 156 flow. Second operand 3 states and 521 transitions. [2023-08-31 22:21:45,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 69 transitions, 349 flow [2023-08-31 22:21:45,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 69 transitions, 341 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:21:45,474 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 179 flow [2023-08-31 22:21:45,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2023-08-31 22:21:45,475 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2023-08-31 22:21:45,475 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 179 flow [2023-08-31 22:21:45,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:45,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:45,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:45,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-31 22:21:45,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:45,685 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:45,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:45,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1538942634, now seen corresponding path program 1 times [2023-08-31 22:21:45,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:45,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901446575] [2023-08-31 22:21:45,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:45,686 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:45,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:45,687 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:21:45,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-31 22:21:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:45,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-31 22:21:45,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:45,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:45,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:45,770 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:45,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901446575] [2023-08-31 22:21:45,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901446575] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:45,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:45,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:21:45,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795208556] [2023-08-31 22:21:45,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:45,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:45,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:45,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:45,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:45,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 330 [2023-08-31 22:21:45,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:45,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:45,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 330 [2023-08-31 22:21:45,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:46,036 INFO L130 PetriNetUnfolder]: 1329/2262 cut-off events. [2023-08-31 22:21:46,037 INFO L131 PetriNetUnfolder]: For 883/883 co-relation queries the response was YES. [2023-08-31 22:21:46,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5518 conditions, 2262 events. 1329/2262 cut-off events. For 883/883 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11997 event pairs, 623 based on Foata normal form. 10/2040 useless extension candidates. Maximal degree in co-relation 5509. Up to 1915 conditions per place. [2023-08-31 22:21:46,048 INFO L137 encePairwiseOnDemand]: 327/330 looper letters, 67 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-08-31 22:21:46,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 72 transitions, 378 flow [2023-08-31 22:21:46,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:46,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:46,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2023-08-31 22:21:46,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5323232323232323 [2023-08-31 22:21:46,051 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2023-08-31 22:21:46,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2023-08-31 22:21:46,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:46,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2023-08-31 22:21:46,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:46,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:46,075 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:46,075 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 179 flow. Second operand 3 states and 527 transitions. [2023-08-31 22:21:46,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 72 transitions, 378 flow [2023-08-31 22:21:46,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 72 transitions, 372 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:21:46,080 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 183 flow [2023-08-31 22:21:46,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2023-08-31 22:21:46,082 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-31 22:21:46,082 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 183 flow [2023-08-31 22:21:46,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:46,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:46,082 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:46,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-31 22:21:46,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:46,292 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:46,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:46,292 INFO L85 PathProgramCache]: Analyzing trace with hash 583147771, now seen corresponding path program 1 times [2023-08-31 22:21:46,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:46,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491629097] [2023-08-31 22:21:46,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:46,293 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:46,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:46,293 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:21:46,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-31 22:21:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:46,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 22:21:46,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:46,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:21:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:46,438 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:46,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491629097] [2023-08-31 22:21:46,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491629097] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:21:46,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:21:46,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-31 22:21:46,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89188030] [2023-08-31 22:21:46,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:21:46,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 22:21:46,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:46,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 22:21:46,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-31 22:21:46,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 330 [2023-08-31 22:21:46,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 183 flow. Second operand has 8 states, 8 states have (on average 154.375) internal successors, (1235), 8 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:46,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:46,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 330 [2023-08-31 22:21:46,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:47,537 INFO L130 PetriNetUnfolder]: 3502/5819 cut-off events. [2023-08-31 22:21:47,537 INFO L131 PetriNetUnfolder]: For 1898/1898 co-relation queries the response was YES. [2023-08-31 22:21:47,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14451 conditions, 5819 events. 3502/5819 cut-off events. For 1898/1898 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 32127 event pairs, 512 based on Foata normal form. 96/5291 useless extension candidates. Maximal degree in co-relation 14441. Up to 1238 conditions per place. [2023-08-31 22:21:47,561 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 258 selfloop transitions, 32 changer transitions 0/292 dead transitions. [2023-08-31 22:21:47,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 292 transitions, 1452 flow [2023-08-31 22:21:47,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 22:21:47,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 22:21:47,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2242 transitions. [2023-08-31 22:21:47,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226107226107226 [2023-08-31 22:21:47,567 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2242 transitions. [2023-08-31 22:21:47,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2242 transitions. [2023-08-31 22:21:47,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:47,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2242 transitions. [2023-08-31 22:21:47,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 172.46153846153845) internal successors, (2242), 13 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:47,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 330.0) internal successors, (4620), 14 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:47,582 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 330.0) internal successors, (4620), 14 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:47,582 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 183 flow. Second operand 13 states and 2242 transitions. [2023-08-31 22:21:47,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 292 transitions, 1452 flow [2023-08-31 22:21:47,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 292 transitions, 1448 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:21:47,593 INFO L231 Difference]: Finished difference. Result has 67 places, 79 transitions, 428 flow [2023-08-31 22:21:47,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=428, PETRI_PLACES=67, PETRI_TRANSITIONS=79} [2023-08-31 22:21:47,595 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 18 predicate places. [2023-08-31 22:21:47,595 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 79 transitions, 428 flow [2023-08-31 22:21:47,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 154.375) internal successors, (1235), 8 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:47,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:47,596 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:47,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-08-31 22:21:47,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:47,805 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:47,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:47,806 INFO L85 PathProgramCache]: Analyzing trace with hash 583146502, now seen corresponding path program 1 times [2023-08-31 22:21:47,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:47,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292102819] [2023-08-31 22:21:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:47,806 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:47,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:47,807 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:21:47,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-31 22:21:47,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:47,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-31 22:21:47,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:47,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:21:47,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:21:47,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:21:47,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-08-31 22:21:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:48,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:21:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:48,580 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:48,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292102819] [2023-08-31 22:21:48,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292102819] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:21:48,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:21:48,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-31 22:21:48,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492005787] [2023-08-31 22:21:48,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:21:48,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 22:21:48,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:48,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 22:21:48,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-08-31 22:21:51,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 330 [2023-08-31 22:21:51,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 79 transitions, 428 flow. Second operand has 12 states, 12 states have (on average 148.33333333333334) internal successors, (1780), 12 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:51,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:51,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 330 [2023-08-31 22:21:51,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:54,619 INFO L130 PetriNetUnfolder]: 5099/8513 cut-off events. [2023-08-31 22:21:54,619 INFO L131 PetriNetUnfolder]: For 6582/6582 co-relation queries the response was YES. [2023-08-31 22:21:54,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22986 conditions, 8513 events. 5099/8513 cut-off events. For 6582/6582 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 50990 event pairs, 1445 based on Foata normal form. 84/7711 useless extension candidates. Maximal degree in co-relation 22973. Up to 5427 conditions per place. [2023-08-31 22:21:54,667 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 240 selfloop transitions, 28 changer transitions 0/270 dead transitions. [2023-08-31 22:21:54,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 270 transitions, 1582 flow [2023-08-31 22:21:54,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 22:21:54,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 22:21:54,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2262 transitions. [2023-08-31 22:21:54,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896103896103896 [2023-08-31 22:21:54,674 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2262 transitions. [2023-08-31 22:21:54,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2262 transitions. [2023-08-31 22:21:54,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:54,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2262 transitions. [2023-08-31 22:21:54,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 161.57142857142858) internal successors, (2262), 14 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:54,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 330.0) internal successors, (4950), 15 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:54,688 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 330.0) internal successors, (4950), 15 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:54,688 INFO L175 Difference]: Start difference. First operand has 67 places, 79 transitions, 428 flow. Second operand 14 states and 2262 transitions. [2023-08-31 22:21:54,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 270 transitions, 1582 flow [2023-08-31 22:21:54,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 270 transitions, 1522 flow, removed 30 selfloop flow, removed 0 redundant places. [2023-08-31 22:21:54,716 INFO L231 Difference]: Finished difference. Result has 85 places, 103 transitions, 658 flow [2023-08-31 22:21:54,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=658, PETRI_PLACES=85, PETRI_TRANSITIONS=103} [2023-08-31 22:21:54,717 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 36 predicate places. [2023-08-31 22:21:54,717 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 103 transitions, 658 flow [2023-08-31 22:21:54,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 148.33333333333334) internal successors, (1780), 12 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:54,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:54,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:54,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-31 22:21:54,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:54,921 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:54,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:54,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1940254627, now seen corresponding path program 1 times [2023-08-31 22:21:54,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:54,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985827965] [2023-08-31 22:21:54,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:54,926 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:54,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:54,929 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:21:54,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-31 22:21:55,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:55,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 22:21:55,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:55,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 9 [2023-08-31 22:21:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:55,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:55,033 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:55,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985827965] [2023-08-31 22:21:55,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985827965] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:55,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:55,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:21:55,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94106343] [2023-08-31 22:21:55,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:55,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:55,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:55,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:55,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:55,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 330 [2023-08-31 22:21:55,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 103 transitions, 658 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:55,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:55,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 330 [2023-08-31 22:21:55,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:55,346 INFO L130 PetriNetUnfolder]: 1277/2496 cut-off events. [2023-08-31 22:21:55,346 INFO L131 PetriNetUnfolder]: For 2072/2072 co-relation queries the response was YES. [2023-08-31 22:21:55,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6874 conditions, 2496 events. 1277/2496 cut-off events. For 2072/2072 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 13334 event pairs, 235 based on Foata normal form. 102/2468 useless extension candidates. Maximal degree in co-relation 6855. Up to 1764 conditions per place. [2023-08-31 22:21:55,356 INFO L137 encePairwiseOnDemand]: 325/330 looper letters, 66 selfloop transitions, 9 changer transitions 0/83 dead transitions. [2023-08-31 22:21:55,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 83 transitions, 612 flow [2023-08-31 22:21:55,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:55,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:55,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 506 transitions. [2023-08-31 22:21:55,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2023-08-31 22:21:55,359 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 506 transitions. [2023-08-31 22:21:55,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 506 transitions. [2023-08-31 22:21:55,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:55,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 506 transitions. [2023-08-31 22:21:55,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:55,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:55,363 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:55,363 INFO L175 Difference]: Start difference. First operand has 85 places, 103 transitions, 658 flow. Second operand 3 states and 506 transitions. [2023-08-31 22:21:55,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 83 transitions, 612 flow [2023-08-31 22:21:55,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 83 transitions, 588 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-08-31 22:21:55,373 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 432 flow [2023-08-31 22:21:55,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2023-08-31 22:21:55,373 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 29 predicate places. [2023-08-31 22:21:55,373 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 432 flow [2023-08-31 22:21:55,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:55,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:55,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:55,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-31 22:21:55,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:55,584 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:55,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:55,584 INFO L85 PathProgramCache]: Analyzing trace with hash 649205973, now seen corresponding path program 1 times [2023-08-31 22:21:55,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:55,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803960829] [2023-08-31 22:21:55,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:55,585 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:55,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:55,586 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:21:55,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-31 22:21:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:55,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 22:21:55,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:55,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:55,743 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:55,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803960829] [2023-08-31 22:21:55,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803960829] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:55,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:55,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 22:21:55,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205366197] [2023-08-31 22:21:55,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:55,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 22:21:55,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:55,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 22:21:55,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-31 22:21:56,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 330 [2023-08-31 22:21:56,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 432 flow. Second operand has 7 states, 7 states have (on average 149.71428571428572) internal successors, (1048), 7 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:56,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:56,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 330 [2023-08-31 22:21:56,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:56,579 INFO L130 PetriNetUnfolder]: 1601/3102 cut-off events. [2023-08-31 22:21:56,579 INFO L131 PetriNetUnfolder]: For 2095/2095 co-relation queries the response was YES. [2023-08-31 22:21:56,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8769 conditions, 3102 events. 1601/3102 cut-off events. For 2095/2095 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 16912 event pairs, 301 based on Foata normal form. 0/3091 useless extension candidates. Maximal degree in co-relation 8750. Up to 1380 conditions per place. [2023-08-31 22:21:56,596 INFO L137 encePairwiseOnDemand]: 321/330 looper letters, 88 selfloop transitions, 28 changer transitions 0/124 dead transitions. [2023-08-31 22:21:56,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 124 transitions, 885 flow [2023-08-31 22:21:56,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 22:21:56,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 22:21:56,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1400 transitions. [2023-08-31 22:21:56,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4713804713804714 [2023-08-31 22:21:56,601 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1400 transitions. [2023-08-31 22:21:56,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1400 transitions. [2023-08-31 22:21:56,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:56,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1400 transitions. [2023-08-31 22:21:56,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 155.55555555555554) internal successors, (1400), 9 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:56,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 330.0) internal successors, (3300), 10 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:56,610 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 330.0) internal successors, (3300), 10 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:56,610 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 432 flow. Second operand 9 states and 1400 transitions. [2023-08-31 22:21:56,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 124 transitions, 885 flow [2023-08-31 22:21:56,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 124 transitions, 869 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:21:56,621 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 594 flow [2023-08-31 22:21:56,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=594, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2023-08-31 22:21:56,622 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 37 predicate places. [2023-08-31 22:21:56,622 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 594 flow [2023-08-31 22:21:56,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 149.71428571428572) internal successors, (1048), 7 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:56,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:56,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:56,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-31 22:21:56,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:56,833 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:56,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:56,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1490732010, now seen corresponding path program 1 times [2023-08-31 22:21:56,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:21:56,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500315766] [2023-08-31 22:21:56,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:56,834 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:21:56,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:21:56,835 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:21:56,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-31 22:21:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:56,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-31 22:21:56,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:57,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:57,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:21:57,250 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:21:57,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500315766] [2023-08-31 22:21:57,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500315766] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:57,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:57,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-31 22:21:57,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517884659] [2023-08-31 22:21:57,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:57,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 22:21:57,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:21:57,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 22:21:57,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-08-31 22:21:58,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 330 [2023-08-31 22:21:58,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 594 flow. Second operand has 13 states, 13 states have (on average 140.53846153846155) internal successors, (1827), 13 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:58,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:58,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 330 [2023-08-31 22:21:58,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:00,107 INFO L130 PetriNetUnfolder]: 2210/4191 cut-off events. [2023-08-31 22:22:00,107 INFO L131 PetriNetUnfolder]: For 3063/3063 co-relation queries the response was YES. [2023-08-31 22:22:00,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12188 conditions, 4191 events. 2210/4191 cut-off events. For 3063/3063 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 24174 event pairs, 639 based on Foata normal form. 38/4191 useless extension candidates. Maximal degree in co-relation 12166. Up to 2694 conditions per place. [2023-08-31 22:22:00,152 INFO L137 encePairwiseOnDemand]: 315/330 looper letters, 191 selfloop transitions, 33 changer transitions 0/226 dead transitions. [2023-08-31 22:22:00,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 226 transitions, 1573 flow [2023-08-31 22:22:00,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 22:22:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 22:22:00,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2537 transitions. [2023-08-31 22:22:00,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45222816399286986 [2023-08-31 22:22:00,165 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2537 transitions. [2023-08-31 22:22:00,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2537 transitions. [2023-08-31 22:22:00,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:00,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2537 transitions. [2023-08-31 22:22:00,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 149.23529411764707) internal successors, (2537), 17 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:00,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 330.0) internal successors, (5940), 18 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:00,184 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 330.0) internal successors, (5940), 18 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:00,184 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 594 flow. Second operand 17 states and 2537 transitions. [2023-08-31 22:22:00,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 226 transitions, 1573 flow [2023-08-31 22:22:00,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 226 transitions, 1508 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 22:22:00,201 INFO L231 Difference]: Finished difference. Result has 112 places, 113 transitions, 891 flow [2023-08-31 22:22:00,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=891, PETRI_PLACES=112, PETRI_TRANSITIONS=113} [2023-08-31 22:22:00,203 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 63 predicate places. [2023-08-31 22:22:00,203 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 113 transitions, 891 flow [2023-08-31 22:22:00,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 140.53846153846155) internal successors, (1827), 13 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:00,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:00,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:00,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-31 22:22:00,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:22:00,413 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:00,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:00,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1867234959, now seen corresponding path program 1 times [2023-08-31 22:22:00,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:22:00,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465344381] [2023-08-31 22:22:00,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:00,414 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:22:00,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:22:00,415 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:22:00,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-31 22:22:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:00,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-31 22:22:00,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:22:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:22:00,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:22:00,502 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:22:00,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465344381] [2023-08-31 22:22:00,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465344381] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:00,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:00,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:22:00,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15697151] [2023-08-31 22:22:00,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:00,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:22:00,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:22:00,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:22:00,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:22:00,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 330 [2023-08-31 22:22:00,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 113 transitions, 891 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:00,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:00,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 330 [2023-08-31 22:22:00,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:01,086 INFO L130 PetriNetUnfolder]: 2391/4682 cut-off events. [2023-08-31 22:22:01,086 INFO L131 PetriNetUnfolder]: For 6746/6746 co-relation queries the response was YES. [2023-08-31 22:22:01,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15237 conditions, 4682 events. 2391/4682 cut-off events. For 6746/6746 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 28821 event pairs, 1657 based on Foata normal form. 102/4716 useless extension candidates. Maximal degree in co-relation 15201. Up to 3747 conditions per place. [2023-08-31 22:22:01,108 INFO L137 encePairwiseOnDemand]: 326/330 looper letters, 154 selfloop transitions, 3 changer transitions 0/167 dead transitions. [2023-08-31 22:22:01,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 167 transitions, 1590 flow [2023-08-31 22:22:01,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:22:01,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:22:01,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2023-08-31 22:22:01,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2023-08-31 22:22:01,110 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2023-08-31 22:22:01,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2023-08-31 22:22:01,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:01,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2023-08-31 22:22:01,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:01,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:01,114 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:01,114 INFO L175 Difference]: Start difference. First operand has 112 places, 113 transitions, 891 flow. Second operand 3 states and 528 transitions. [2023-08-31 22:22:01,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 167 transitions, 1590 flow [2023-08-31 22:22:01,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 167 transitions, 1570 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-08-31 22:22:01,147 INFO L231 Difference]: Finished difference. Result has 115 places, 115 transitions, 892 flow [2023-08-31 22:22:01,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=892, PETRI_PLACES=115, PETRI_TRANSITIONS=115} [2023-08-31 22:22:01,148 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 66 predicate places. [2023-08-31 22:22:01,148 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 115 transitions, 892 flow [2023-08-31 22:22:01,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:01,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:01,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:01,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-31 22:22:01,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:22:01,358 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:01,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:01,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1886484981, now seen corresponding path program 1 times [2023-08-31 22:22:01,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:22:01,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228532744] [2023-08-31 22:22:01,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:01,359 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:22:01,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:22:01,361 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:22:01,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-31 22:22:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:01,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 22:22:01,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:22:01,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-08-31 22:22:01,836 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 15 treesize of output 7 [2023-08-31 22:22:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:01,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:22:01,857 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:22:01,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228532744] [2023-08-31 22:22:01,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228532744] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:01,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:01,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-31 22:22:01,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292264090] [2023-08-31 22:22:01,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:01,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 22:22:01,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:22:01,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 22:22:01,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-08-31 22:22:03,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 330 [2023-08-31 22:22:03,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 115 transitions, 892 flow. Second operand has 15 states, 15 states have (on average 130.46666666666667) internal successors, (1957), 15 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:03,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:03,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 330 [2023-08-31 22:22:03,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:05,021 INFO L130 PetriNetUnfolder]: 3168/6068 cut-off events. [2023-08-31 22:22:05,021 INFO L131 PetriNetUnfolder]: For 8322/8322 co-relation queries the response was YES. [2023-08-31 22:22:05,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20622 conditions, 6068 events. 3168/6068 cut-off events. For 8322/8322 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 38271 event pairs, 912 based on Foata normal form. 12/6080 useless extension candidates. Maximal degree in co-relation 20584. Up to 4467 conditions per place. [2023-08-31 22:22:05,050 INFO L137 encePairwiseOnDemand]: 313/330 looper letters, 234 selfloop transitions, 47 changer transitions 0/283 dead transitions. [2023-08-31 22:22:05,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 283 transitions, 2289 flow [2023-08-31 22:22:05,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 22:22:05,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 22:22:05,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3158 transitions. [2023-08-31 22:22:05,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160737812911726 [2023-08-31 22:22:05,057 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3158 transitions. [2023-08-31 22:22:05,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3158 transitions. [2023-08-31 22:22:05,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:05,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3158 transitions. [2023-08-31 22:22:05,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 137.30434782608697) internal successors, (3158), 23 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:05,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 330.0) internal successors, (7920), 24 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:05,073 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 330.0) internal successors, (7920), 24 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:05,073 INFO L175 Difference]: Start difference. First operand has 115 places, 115 transitions, 892 flow. Second operand 23 states and 3158 transitions. [2023-08-31 22:22:05,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 283 transitions, 2289 flow [2023-08-31 22:22:05,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 283 transitions, 2276 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:22:05,112 INFO L231 Difference]: Finished difference. Result has 152 places, 158 transitions, 1442 flow [2023-08-31 22:22:05,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1442, PETRI_PLACES=152, PETRI_TRANSITIONS=158} [2023-08-31 22:22:05,113 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 103 predicate places. [2023-08-31 22:22:05,113 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 158 transitions, 1442 flow [2023-08-31 22:22:05,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 130.46666666666667) internal successors, (1957), 15 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:05,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:05,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:05,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-31 22:22:05,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:22:05,323 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:05,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:05,324 INFO L85 PathProgramCache]: Analyzing trace with hash -187980491, now seen corresponding path program 2 times [2023-08-31 22:22:05,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:22:05,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479251674] [2023-08-31 22:22:05,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 22:22:05,324 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:22:05,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:22:05,325 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:22:05,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-31 22:22:05,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 22:22:05,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:22:05,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 22:22:05,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:22:05,485 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2023-08-31 22:22:05,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2023-08-31 22:22:05,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-08-31 22:22:05,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-08-31 22:22:05,941 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 15 treesize of output 7 [2023-08-31 22:22:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:05,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:22:05,963 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:22:05,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479251674] [2023-08-31 22:22:05,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [479251674] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:05,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:05,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-31 22:22:05,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721699281] [2023-08-31 22:22:05,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:05,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 22:22:05,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:22:05,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 22:22:05,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-08-31 22:22:07,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-08-31 22:22:07,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 158 transitions, 1442 flow. Second operand has 16 states, 16 states have (on average 127.375) internal successors, (2038), 16 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:07,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:07,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-08-31 22:22:07,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:09,316 INFO L130 PetriNetUnfolder]: 3729/7146 cut-off events. [2023-08-31 22:22:09,316 INFO L131 PetriNetUnfolder]: For 12053/12053 co-relation queries the response was YES. [2023-08-31 22:22:09,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25514 conditions, 7146 events. 3729/7146 cut-off events. For 12053/12053 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 46075 event pairs, 1227 based on Foata normal form. 6/7149 useless extension candidates. Maximal degree in co-relation 25460. Up to 5387 conditions per place. [2023-08-31 22:22:09,354 INFO L137 encePairwiseOnDemand]: 313/330 looper letters, 237 selfloop transitions, 43 changer transitions 0/282 dead transitions. [2023-08-31 22:22:09,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 282 transitions, 2708 flow [2023-08-31 22:22:09,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 22:22:09,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 22:22:09,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2041 transitions. [2023-08-31 22:22:09,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4123232323232323 [2023-08-31 22:22:09,357 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2041 transitions. [2023-08-31 22:22:09,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2041 transitions. [2023-08-31 22:22:09,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:09,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2041 transitions. [2023-08-31 22:22:09,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 136.06666666666666) internal successors, (2041), 15 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:09,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 330.0) internal successors, (5280), 16 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:09,366 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 330.0) internal successors, (5280), 16 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:09,366 INFO L175 Difference]: Start difference. First operand has 152 places, 158 transitions, 1442 flow. Second operand 15 states and 2041 transitions. [2023-08-31 22:22:09,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 282 transitions, 2708 flow [2023-08-31 22:22:09,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 282 transitions, 2696 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-31 22:22:09,516 INFO L231 Difference]: Finished difference. Result has 175 places, 185 transitions, 1886 flow [2023-08-31 22:22:09,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=1434, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1886, PETRI_PLACES=175, PETRI_TRANSITIONS=185} [2023-08-31 22:22:09,517 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 126 predicate places. [2023-08-31 22:22:09,517 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 185 transitions, 1886 flow [2023-08-31 22:22:09,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 127.375) internal successors, (2038), 16 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:09,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:09,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:09,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-08-31 22:22:09,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:22:09,727 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:09,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:09,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1824818857, now seen corresponding path program 3 times [2023-08-31 22:22:09,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:22:09,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738808623] [2023-08-31 22:22:09,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 22:22:09,728 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:22:09,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:22:09,730 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:22:09,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-31 22:22:09,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-31 22:22:09,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:22:09,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 22:22:09,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:22:09,892 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2023-08-31 22:22:09,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2023-08-31 22:22:10,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-08-31 22:22:10,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-08-31 22:22:10,377 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 15 treesize of output 7 [2023-08-31 22:22:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:10,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:22:10,393 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:22:10,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738808623] [2023-08-31 22:22:10,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738808623] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:10,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:22:10,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-31 22:22:10,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062024386] [2023-08-31 22:22:10,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:10,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 22:22:10,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:22:10,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 22:22:10,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-08-31 22:22:11,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 330 [2023-08-31 22:22:11,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 185 transitions, 1886 flow. Second operand has 16 states, 16 states have (on average 127.375) internal successors, (2038), 16 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:11,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:11,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 330 [2023-08-31 22:22:11,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:14,144 INFO L130 PetriNetUnfolder]: 3709/7106 cut-off events. [2023-08-31 22:22:14,145 INFO L131 PetriNetUnfolder]: For 13898/13898 co-relation queries the response was YES. [2023-08-31 22:22:14,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26345 conditions, 7106 events. 3709/7106 cut-off events. For 13898/13898 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 45703 event pairs, 909 based on Foata normal form. 12/7112 useless extension candidates. Maximal degree in co-relation 26281. Up to 3383 conditions per place. [2023-08-31 22:22:14,183 INFO L137 encePairwiseOnDemand]: 313/330 looper letters, 193 selfloop transitions, 105 changer transitions 0/300 dead transitions. [2023-08-31 22:22:14,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 300 transitions, 2977 flow [2023-08-31 22:22:14,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 22:22:14,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 22:22:14,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2944 transitions. [2023-08-31 22:22:14,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40550964187327826 [2023-08-31 22:22:14,188 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2944 transitions. [2023-08-31 22:22:14,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2944 transitions. [2023-08-31 22:22:14,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:14,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2944 transitions. [2023-08-31 22:22:14,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 133.8181818181818) internal successors, (2944), 22 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:14,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 330.0) internal successors, (7590), 23 states have internal predecessors, (7590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:14,291 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 330.0) internal successors, (7590), 23 states have internal predecessors, (7590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:14,292 INFO L175 Difference]: Start difference. First operand has 175 places, 185 transitions, 1886 flow. Second operand 22 states and 2944 transitions. [2023-08-31 22:22:14,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 300 transitions, 2977 flow [2023-08-31 22:22:14,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 300 transitions, 2958 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-31 22:22:14,375 INFO L231 Difference]: Finished difference. Result has 196 places, 196 transitions, 2223 flow [2023-08-31 22:22:14,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=1867, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2223, PETRI_PLACES=196, PETRI_TRANSITIONS=196} [2023-08-31 22:22:14,376 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 147 predicate places. [2023-08-31 22:22:14,376 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 196 transitions, 2223 flow [2023-08-31 22:22:14,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 127.375) internal successors, (2038), 16 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:14,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:14,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:14,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-31 22:22:14,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:22:14,587 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:14,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:14,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1957063094, now seen corresponding path program 1 times [2023-08-31 22:22:14,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:22:14,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390731565] [2023-08-31 22:22:14,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:14,588 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:22:14,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:22:14,589 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:22:14,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-31 22:22:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:14,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 22:22:14,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:22:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:22:14,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:22:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:22:14,705 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-31 22:22:14,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390731565] [2023-08-31 22:22:14,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390731565] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:22:14,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-31 22:22:14,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-08-31 22:22:14,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486510440] [2023-08-31 22:22:14,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-31 22:22:14,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:22:14,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-31 22:22:14,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:22:14,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:22:14,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 330 [2023-08-31 22:22:14,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 196 transitions, 2223 flow. Second operand has 6 states, 6 states have (on average 158.33333333333334) internal successors, (950), 6 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:14,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:14,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 330 [2023-08-31 22:22:14,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:16,876 INFO L130 PetriNetUnfolder]: 6549/13336 cut-off events. [2023-08-31 22:22:16,876 INFO L131 PetriNetUnfolder]: For 35357/35361 co-relation queries the response was YES. [2023-08-31 22:22:16,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51761 conditions, 13336 events. 6549/13336 cut-off events. For 35357/35361 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 105073 event pairs, 2123 based on Foata normal form. 1756/15091 useless extension candidates. Maximal degree in co-relation 51692. Up to 3645 conditions per place. [2023-08-31 22:22:16,978 INFO L137 encePairwiseOnDemand]: 325/330 looper letters, 552 selfloop transitions, 22 changer transitions 0/587 dead transitions. [2023-08-31 22:22:16,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 587 transitions, 7599 flow [2023-08-31 22:22:16,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 22:22:16,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 22:22:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1059 transitions. [2023-08-31 22:22:16,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348484848484848 [2023-08-31 22:22:16,980 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1059 transitions. [2023-08-31 22:22:16,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1059 transitions. [2023-08-31 22:22:16,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:16,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1059 transitions. [2023-08-31 22:22:16,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 176.5) internal successors, (1059), 6 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:16,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 330.0) internal successors, (2310), 7 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:16,984 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 330.0) internal successors, (2310), 7 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:16,984 INFO L175 Difference]: Start difference. First operand has 196 places, 196 transitions, 2223 flow. Second operand 6 states and 1059 transitions. [2023-08-31 22:22:16,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 587 transitions, 7599 flow [2023-08-31 22:22:17,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 587 transitions, 7069 flow, removed 58 selfloop flow, removed 15 redundant places. [2023-08-31 22:22:17,243 INFO L231 Difference]: Finished difference. Result has 190 places, 207 transitions, 2242 flow [2023-08-31 22:22:17,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=2039, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2242, PETRI_PLACES=190, PETRI_TRANSITIONS=207} [2023-08-31 22:22:17,244 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 141 predicate places. [2023-08-31 22:22:17,244 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 207 transitions, 2242 flow [2023-08-31 22:22:17,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 158.33333333333334) internal successors, (950), 6 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:17,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:17,244 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:17,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-31 22:22:17,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:22:17,445 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:17,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:17,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1014945870, now seen corresponding path program 1 times [2023-08-31 22:22:17,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-31 22:22:17,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131743738] [2023-08-31 22:22:17,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:17,446 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:22:17,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-31 22:22:17,447 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-31 22:22:17,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-31 22:22:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:22:17,556 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:22:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:22:17,655 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-08-31 22:22:17,655 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:22:17,656 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2023-08-31 22:22:17,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2023-08-31 22:22:17,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-08-31 22:22:17,659 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-08-31 22:22:17,659 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-08-31 22:22:17,659 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2023-08-31 22:22:17,659 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2023-08-31 22:22:17,659 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-08-31 22:22:17,659 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-08-31 22:22:17,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2023-08-31 22:22:17,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2023-08-31 22:22:17,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2023-08-31 22:22:17,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2023-08-31 22:22:17,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-08-31 22:22:17,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2023-08-31 22:22:17,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 23 remaining) [2023-08-31 22:22:17,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2023-08-31 22:22:17,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2023-08-31 22:22:17,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2023-08-31 22:22:17,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2023-08-31 22:22:17,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2023-08-31 22:22:17,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2023-08-31 22:22:17,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2023-08-31 22:22:17,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2023-08-31 22:22:17,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-31 22:22:17,873 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:17,878 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-31 22:22:17,878 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-31 22:22:17,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.08 10:22:17 BasicIcfg [2023-08-31 22:22:17,939 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-31 22:22:17,939 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-31 22:22:17,939 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-31 22:22:17,939 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-31 22:22:17,940 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:21:28" (3/4) ... [2023-08-31 22:22:17,942 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-31 22:22:17,942 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-31 22:22:17,943 INFO L158 Benchmark]: Toolchain (without parser) took 50455.35ms. Allocated memory was 60.8MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 36.4MB in the beginning and 626.3MB in the end (delta: -589.9MB). Peak memory consumption was 515.2MB. Max. memory is 16.1GB. [2023-08-31 22:22:17,943 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 50.3MB. Free memory was 28.6MB in the beginning and 28.6MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 22:22:17,943 INFO L158 Benchmark]: CACSL2BoogieTranslator took 572.40ms. Allocated memory was 60.8MB in the beginning and 73.4MB in the end (delta: 12.6MB). Free memory was 36.3MB in the beginning and 47.8MB in the end (delta: -11.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-08-31 22:22:17,943 INFO L158 Benchmark]: Boogie Procedure Inliner took 69.19ms. Allocated memory is still 73.4MB. Free memory was 47.5MB in the beginning and 44.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 22:22:17,944 INFO L158 Benchmark]: Boogie Preprocessor took 31.82ms. Allocated memory is still 73.4MB. Free memory was 44.9MB in the beginning and 42.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 22:22:17,944 INFO L158 Benchmark]: RCFGBuilder took 612.65ms. Allocated memory is still 73.4MB. Free memory was 42.7MB in the beginning and 38.4MB in the end (delta: 4.3MB). Peak memory consumption was 16.7MB. Max. memory is 16.1GB. [2023-08-31 22:22:17,944 INFO L158 Benchmark]: TraceAbstraction took 49160.72ms. Allocated memory was 73.4MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 37.7MB in the beginning and 626.3MB in the end (delta: -588.6MB). Peak memory consumption was 500.5MB. Max. memory is 16.1GB. [2023-08-31 22:22:17,944 INFO L158 Benchmark]: Witness Printer took 3.08ms. Allocated memory is still 1.2GB. Free memory is still 626.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 22:22:17,946 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 50.3MB. Free memory was 28.6MB in the beginning and 28.6MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 572.40ms. Allocated memory was 60.8MB in the beginning and 73.4MB in the end (delta: 12.6MB). Free memory was 36.3MB in the beginning and 47.8MB in the end (delta: -11.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 69.19ms. Allocated memory is still 73.4MB. Free memory was 47.5MB in the beginning and 44.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.82ms. Allocated memory is still 73.4MB. Free memory was 44.9MB in the beginning and 42.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 612.65ms. Allocated memory is still 73.4MB. Free memory was 42.7MB in the beginning and 38.4MB in the end (delta: 4.3MB). Peak memory consumption was 16.7MB. Max. memory is 16.1GB. * TraceAbstraction took 49160.72ms. Allocated memory was 73.4MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 37.7MB in the beginning and 626.3MB in the end (delta: -588.6MB). Peak memory consumption was 500.5MB. Max. memory is 16.1GB. * Witness Printer took 3.08ms. Allocated memory is still 1.2GB. Free memory is still 626.3MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8.1s, 161 PlacesBefore, 49 PlacesAfterwards, 164 TransitionsBefore, 47 TransitionsAfterwards, 8060 CoEnabledTransitionPairs, 6 FixpointIterations, 42 TrivialSequentialCompositions, 95 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 18 ConcurrentYvCompositions, 5 ChoiceCompositions, 160 TotalNumberOfCompositions, 12918 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9264, independent: 9043, independent conditional: 0, independent unconditional: 9043, dependent: 221, dependent conditional: 0, dependent unconditional: 221, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4651, independent: 4594, independent conditional: 0, independent unconditional: 4594, dependent: 57, dependent conditional: 0, dependent unconditional: 57, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9264, independent: 4449, independent conditional: 0, independent unconditional: 4449, dependent: 164, dependent conditional: 0, dependent unconditional: 164, unknown: 4651, unknown conditional: 0, unknown unconditional: 4651] , Statistics on independence cache: Total cache size (in pairs): 309, Positive cache size: 288, Positive conditional cache size: 0, Positive unconditional cache size: 288, Negative cache size: 21, Negative conditional cache size: 0, Negative unconditional cache size: 21, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 940]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 940. Possible FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(400)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1019] 0 pthread_t id1, id2; [L1021] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={15:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=0, top=0] [L988] 1 int i; [L989] 1 unsigned int tmp; [L990] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1022] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={15:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=1, top=0] [L990] COND TRUE 1 i<(400) [L993] 1 tmp = __VERIFIER_nondet_uint() [L994] CALL 1 assume_abort_if_not(tmp < (400)) [L23] COND FALSE 1 !(!cond) [L994] RET 1 assume_abort_if_not(tmp < (400)) [L995] CALL, EXPR 1 push(arr,tmp) [L960] COND FALSE 1 !(top==(400)) [L967] CALL, EXPR 1 get_top() [L952] 1 return top; [L967] RET, EXPR 1 get_top() [L967] 1 stack[get_top()] = x [L968] CALL 1 inc_top() [L944] 1 top++ [L968] RET 1 inc_top() [L970] 1 return 0; [L995] RET, EXPR 1 push(arr,tmp) [L995] COND FALSE 1 !(push(arr,tmp)==(-1)) [L997] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L990] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=0, top=1] [L1004] 2 int i; [L1005] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND FALSE 2 !(get_top()==0) [L981] CALL 2 dec_top() [L948] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L981] RET 2 dec_top() [L982] CALL, EXPR 2 get_top() [L952] 2 return top; [L982] RET, EXPR 2 get_top() [L982] EXPR 2 stack[get_top()] [L982] 2 return stack[get_top()]; [L1010] RET, EXPR 2 pop(arr) [L1010] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1005] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND TRUE 2 get_top()==0 [L977] 2 return (-2); [L1010] RET, EXPR 2 pop(arr) [L1010] COND TRUE 2 !(pop(arr)!=(-2)) [L1011] CALL 2 error() [L940] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1017]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 940]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 261 locations, 23 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 48.9s, OverallIterations: 22, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 30.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 8.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4887 SdHoareTripleChecker+Valid, 18.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4131 mSDsluCounter, 5878 SdHoareTripleChecker+Invalid, 16.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5574 mSDsCounter, 174 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18909 IncrementalHoareTripleChecker+Invalid, 19083 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 174 mSolverCounterUnsat, 304 mSDtfsCounter, 18909 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 376 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2242occurred in iteration=21, InterpolantAutomatonStates: 161, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 291 NumberOfCodeBlocks, 291 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 293 ConstructedInterpolants, 10 QuantifiedInterpolants, 2421 SizeOfPredicates, 108 NumberOfNonLiveVariables, 2046 ConjunctsInSsa, 211 ConjunctsInUnsatCore, 24 InterpolantComputations, 18 PerfectInterpolantSequences, 5/17 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-08-31 22:22:17,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample