./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 586b4acd2b590d05e6c872ab286b63f1e9a66197df0a80de4a917f3d7db6c786 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 05:11:36,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 05:11:36,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 05:11:36,767 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 05:11:36,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 05:11:36,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 05:11:36,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 05:11:36,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 05:11:36,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 05:11:36,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 05:11:36,783 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 05:11:36,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 05:11:36,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 05:11:36,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 05:11:36,789 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 05:11:36,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 05:11:36,795 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 05:11:36,796 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 05:11:36,798 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 05:11:36,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 05:11:36,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 05:11:36,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 05:11:36,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 05:11:36,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 05:11:36,820 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 05:11:36,821 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 05:11:36,821 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 05:11:36,822 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 05:11:36,823 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 05:11:36,824 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 05:11:36,824 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 05:11:36,827 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 05:11:36,828 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 05:11:36,828 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 05:11:36,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 05:11:36,829 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 05:11:36,830 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 05:11:36,830 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 05:11:36,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 05:11:36,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 05:11:36,832 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 05:11:36,833 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 05:11:36,865 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 05:11:36,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 05:11:36,868 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 05:11:36,868 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 05:11:36,869 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 05:11:36,869 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 05:11:36,869 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 05:11:36,869 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 05:11:36,870 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 05:11:36,870 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 05:11:36,871 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 05:11:36,871 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 05:11:36,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 05:11:36,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 05:11:36,871 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 05:11:36,872 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 05:11:36,872 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 05:11:36,872 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 05:11:36,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 05:11:36,872 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 05:11:36,873 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 05:11:36,873 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 05:11:36,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 05:11:36,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 05:11:36,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 05:11:36,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:11:36,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 05:11:36,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 05:11:36,874 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 05:11:36,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 05:11:36,875 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 05:11:36,875 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 05:11:36,875 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 05:11:36,875 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 05:11:36,876 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 586b4acd2b590d05e6c872ab286b63f1e9a66197df0a80de4a917f3d7db6c786 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 05:11:37,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 05:11:37,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 05:11:37,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 05:11:37,200 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 05:11:37,201 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 05:11:37,202 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c [2023-08-30 05:11:38,285 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 05:11:38,439 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 05:11:38,440 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c [2023-08-30 05:11:38,463 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1972b946/c029ccc33f4d4304835c15d646d6fb21/FLAG8dfc4c8bb [2023-08-30 05:11:38,489 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1972b946/c029ccc33f4d4304835c15d646d6fb21 [2023-08-30 05:11:38,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 05:11:38,493 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 05:11:38,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 05:11:38,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 05:11:38,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 05:11:38,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:11:38" (1/1) ... [2023-08-30 05:11:38,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45644b76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:38, skipping insertion in model container [2023-08-30 05:11:38,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:11:38" (1/1) ... [2023-08-30 05:11:38,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 05:11:38,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:11:38,760 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c[6450,6463] [2023-08-30 05:11:38,778 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:11:38,788 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 05:11:38,844 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c[6450,6463] [2023-08-30 05:11:38,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:11:38,871 INFO L208 MainTranslator]: Completed translation [2023-08-30 05:11:38,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:38 WrapperNode [2023-08-30 05:11:38,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 05:11:38,873 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 05:11:38,873 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 05:11:38,873 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 05:11:38,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:38" (1/1) ... [2023-08-30 05:11:38,903 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:38" (1/1) ... [2023-08-30 05:11:38,954 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 601 [2023-08-30 05:11:38,957 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 05:11:38,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 05:11:38,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 05:11:38,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 05:11:38,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:38" (1/1) ... [2023-08-30 05:11:38,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:38" (1/1) ... [2023-08-30 05:11:38,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:38" (1/1) ... [2023-08-30 05:11:38,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:38" (1/1) ... [2023-08-30 05:11:38,997 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:38" (1/1) ... [2023-08-30 05:11:39,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:38" (1/1) ... [2023-08-30 05:11:39,023 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:38" (1/1) ... [2023-08-30 05:11:39,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:38" (1/1) ... [2023-08-30 05:11:39,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 05:11:39,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 05:11:39,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 05:11:39,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 05:11:39,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:38" (1/1) ... [2023-08-30 05:11:39,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:11:39,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:11:39,070 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 05:11:39,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 05:11:39,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 05:11:39,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 05:11:39,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 05:11:39,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 05:11:39,101 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 05:11:39,101 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 05:11:39,101 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 05:11:39,101 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 05:11:39,101 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 05:11:39,102 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 05:11:39,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 05:11:39,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 05:11:39,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 05:11:39,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 05:11:39,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 05:11:39,104 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 05:11:39,269 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 05:11:39,270 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 05:11:40,057 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 05:11:40,075 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 05:11:40,076 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 05:11:40,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:11:40 BoogieIcfgContainer [2023-08-30 05:11:40,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 05:11:40,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 05:11:40,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 05:11:40,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 05:11:40,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:11:38" (1/3) ... [2023-08-30 05:11:40,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122dbe17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:11:40, skipping insertion in model container [2023-08-30 05:11:40,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:11:38" (2/3) ... [2023-08-30 05:11:40,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122dbe17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:11:40, skipping insertion in model container [2023-08-30 05:11:40,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:11:40" (3/3) ... [2023-08-30 05:11:40,088 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-trans.wvr.c [2023-08-30 05:11:40,103 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 05:11:40,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 68 error locations. [2023-08-30 05:11:40,103 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 05:11:40,304 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 05:11:40,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 724 places, 787 transitions, 1598 flow [2023-08-30 05:11:40,695 INFO L130 PetriNetUnfolder]: 73/784 cut-off events. [2023-08-30 05:11:40,696 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 05:11:40,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 797 conditions, 784 events. 73/784 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2897 event pairs, 0 based on Foata normal form. 0/643 useless extension candidates. Maximal degree in co-relation 577. Up to 2 conditions per place. [2023-08-30 05:11:40,718 INFO L82 GeneralOperation]: Start removeDead. Operand has 724 places, 787 transitions, 1598 flow [2023-08-30 05:11:40,736 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 717 places, 780 transitions, 1578 flow [2023-08-30 05:11:40,739 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 05:11:40,750 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 717 places, 780 transitions, 1578 flow [2023-08-30 05:11:40,753 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 717 places, 780 transitions, 1578 flow [2023-08-30 05:11:40,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 717 places, 780 transitions, 1578 flow [2023-08-30 05:11:41,035 INFO L130 PetriNetUnfolder]: 73/780 cut-off events. [2023-08-30 05:11:41,036 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 05:11:41,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 793 conditions, 780 events. 73/780 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2894 event pairs, 0 based on Foata normal form. 0/640 useless extension candidates. Maximal degree in co-relation 577. Up to 2 conditions per place. [2023-08-30 05:11:41,116 INFO L119 LiptonReduction]: Number of co-enabled transitions 196080 [2023-08-30 05:12:17,674 INFO L134 LiptonReduction]: Checked pairs total: 220167 [2023-08-30 05:12:17,674 INFO L136 LiptonReduction]: Total number of compositions: 1058 [2023-08-30 05:12:17,686 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 05:12:17,692 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;@29ed2151, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 05:12:17,692 INFO L358 AbstractCegarLoop]: Starting to check reachability of 119 error locations. [2023-08-30 05:12:17,694 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 05:12:17,694 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 05:12:17,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:12:17,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:12:17,695 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-30 05:12:17,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:12:17,700 INFO L85 PathProgramCache]: Analyzing trace with hash 111115, now seen corresponding path program 1 times [2023-08-30 05:12:17,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:12:17,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249789001] [2023-08-30 05:12:17,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:17,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:12:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:12:18,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:12:18,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249789001] [2023-08-30 05:12:18,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249789001] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:12:18,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:12:18,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:12:18,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080999793] [2023-08-30 05:12:18,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:12:18,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:12:18,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:12:18,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:12:18,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:12:18,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 722 out of 1845 [2023-08-30 05:12:18,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 116 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 722.6666666666666) internal successors, (2168), 3 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:12:18,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:12:18,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 722 of 1845 [2023-08-30 05:12:18,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:12:28,169 INFO L130 PetriNetUnfolder]: 71352/95312 cut-off events. [2023-08-30 05:12:28,169 INFO L131 PetriNetUnfolder]: For 1188/1188 co-relation queries the response was YES. [2023-08-30 05:12:28,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192063 conditions, 95312 events. 71352/95312 cut-off events. For 1188/1188 co-relation queries the response was YES. Maximal size of possible extension queue 4078. Compared 579561 event pairs, 58845 based on Foata normal form. 0/29264 useless extension candidates. Maximal degree in co-relation 185500. Up to 95307 conditions per place. [2023-08-30 05:12:28,692 INFO L137 encePairwiseOnDemand]: 1818/1845 looper letters, 101 selfloop transitions, 6 changer transitions 0/107 dead transitions. [2023-08-30 05:12:28,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 107 transitions, 446 flow [2023-08-30 05:12:28,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:12:28,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:12:28,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2296 transitions. [2023-08-30 05:12:28,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148148148148148 [2023-08-30 05:12:28,714 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2296 transitions. [2023-08-30 05:12:28,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2296 transitions. [2023-08-30 05:12:28,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:12:28,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2296 transitions. [2023-08-30 05:12:28,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 765.3333333333334) internal successors, (2296), 3 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:12:28,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:12:28,746 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:12:28,748 INFO L175 Difference]: Start difference. First operand has 113 places, 116 transitions, 250 flow. Second operand 3 states and 2296 transitions. [2023-08-30 05:12:28,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 107 transitions, 446 flow [2023-08-30 05:12:28,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 107 transitions, 434 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 05:12:28,869 INFO L231 Difference]: Finished difference. Result has 95 places, 104 transitions, 250 flow [2023-08-30 05:12:28,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=95, PETRI_TRANSITIONS=104} [2023-08-30 05:12:28,875 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -18 predicate places. [2023-08-30 05:12:28,875 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 104 transitions, 250 flow [2023-08-30 05:12:28,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 722.6666666666666) internal successors, (2168), 3 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:12:28,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:12:28,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:12:28,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 05:12:28,878 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-30 05:12:28,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:12:28,887 INFO L85 PathProgramCache]: Analyzing trace with hash 111114, now seen corresponding path program 1 times [2023-08-30 05:12:28,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:12:28,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769038275] [2023-08-30 05:12:28,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:28,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:12:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:12:28,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:12:28,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769038275] [2023-08-30 05:12:28,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769038275] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:12:28,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:12:28,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:12:28,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516455312] [2023-08-30 05:12:28,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:12:28,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:12:28,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:12:28,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:12:28,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:12:29,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 728 out of 1845 [2023-08-30 05:12:29,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 104 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 728.6666666666666) internal successors, (2186), 3 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:12:29,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:12:29,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 728 of 1845 [2023-08-30 05:12:29,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:12:38,047 INFO L130 PetriNetUnfolder]: 71352/95306 cut-off events. [2023-08-30 05:12:38,047 INFO L131 PetriNetUnfolder]: For 189/189 co-relation queries the response was YES. [2023-08-30 05:12:38,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191229 conditions, 95306 events. 71352/95306 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 4042. Compared 579057 event pairs, 58845 based on Foata normal form. 6/29272 useless extension candidates. Maximal degree in co-relation 191192. Up to 95306 conditions per place. [2023-08-30 05:12:38,478 INFO L137 encePairwiseOnDemand]: 1841/1845 looper letters, 100 selfloop transitions, 1 changer transitions 0/101 dead transitions. [2023-08-30 05:12:38,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 101 transitions, 446 flow [2023-08-30 05:12:38,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:12:38,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:12:38,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2285 transitions. [2023-08-30 05:12:38,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128274616079494 [2023-08-30 05:12:38,485 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2285 transitions. [2023-08-30 05:12:38,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2285 transitions. [2023-08-30 05:12:38,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:12:38,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2285 transitions. [2023-08-30 05:12:38,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 761.6666666666666) internal successors, (2285), 3 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:12:38,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:12:38,503 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:12:38,503 INFO L175 Difference]: Start difference. First operand has 95 places, 104 transitions, 250 flow. Second operand 3 states and 2285 transitions. [2023-08-30 05:12:38,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 101 transitions, 446 flow [2023-08-30 05:12:38,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 101 transitions, 440 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:12:38,506 INFO L231 Difference]: Finished difference. Result has 93 places, 101 transitions, 240 flow [2023-08-30 05:12:38,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=93, PETRI_TRANSITIONS=101} [2023-08-30 05:12:38,507 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -20 predicate places. [2023-08-30 05:12:38,507 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 101 transitions, 240 flow [2023-08-30 05:12:38,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 728.6666666666666) internal successors, (2186), 3 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:12:38,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:12:38,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 05:12:38,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 05:12:38,509 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-30 05:12:38,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:12:38,510 INFO L85 PathProgramCache]: Analyzing trace with hash 3450404, now seen corresponding path program 1 times [2023-08-30 05:12:38,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:12:38,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271223431] [2023-08-30 05:12:38,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:38,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:12:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:12:38,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:12:38,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271223431] [2023-08-30 05:12:38,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271223431] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 05:12:38,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760274244] [2023-08-30 05:12:38,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:12:38,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:12:38,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:12:38,690 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 05:12:38,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 05:12:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:12:38,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 05:12:38,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:12:38,949 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 05:12:38,950 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 05:12:39,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:12:39,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:12:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:12:39,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760274244] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:12:39,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 05:12:39,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 05:12:39,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671479773] [2023-08-30 05:12:39,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 05:12:39,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 05:12:39,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:12:39,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 05:12:39,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-08-30 05:12:39,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 713 out of 1845 [2023-08-30 05:12:39,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 101 transitions, 240 flow. Second operand has 8 states, 8 states have (on average 714.125) internal successors, (5713), 8 states have internal predecessors, (5713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:12:39,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:12:39,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 713 of 1845 [2023-08-30 05:12:39,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:13:04,783 INFO L130 PetriNetUnfolder]: 214054/285907 cut-off events. [2023-08-30 05:13:04,783 INFO L131 PetriNetUnfolder]: For 567/567 co-relation queries the response was YES. [2023-08-30 05:13:05,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573638 conditions, 285907 events. 214054/285907 cut-off events. For 567/567 co-relation queries the response was YES. Maximal size of possible extension queue 11377. Compared 1959339 event pairs, 176535 based on Foata normal form. 0/87787 useless extension candidates. Maximal degree in co-relation 573630. Up to 95304 conditions per place. [2023-08-30 05:13:05,864 INFO L137 encePairwiseOnDemand]: 1833/1845 looper letters, 273 selfloop transitions, 19 changer transitions 0/292 dead transitions. [2023-08-30 05:13:05,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 292 transitions, 1256 flow [2023-08-30 05:13:05,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 05:13:05,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 05:13:05,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 4584 transitions. [2023-08-30 05:13:05,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4140921409214092 [2023-08-30 05:13:05,889 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 4584 transitions. [2023-08-30 05:13:05,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 4584 transitions. [2023-08-30 05:13:05,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:13:05,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 4584 transitions. [2023-08-30 05:13:05,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 764.0) internal successors, (4584), 6 states have internal predecessors, (4584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:05,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1845.0) internal successors, (12915), 7 states have internal predecessors, (12915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:05,921 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1845.0) internal successors, (12915), 7 states have internal predecessors, (12915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:05,921 INFO L175 Difference]: Start difference. First operand has 93 places, 101 transitions, 240 flow. Second operand 6 states and 4584 transitions. [2023-08-30 05:13:05,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 292 transitions, 1256 flow [2023-08-30 05:13:05,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 292 transitions, 1255 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:13:05,929 INFO L231 Difference]: Finished difference. Result has 100 places, 114 transitions, 381 flow [2023-08-30 05:13:05,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=381, PETRI_PLACES=100, PETRI_TRANSITIONS=114} [2023-08-30 05:13:05,930 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -13 predicate places. [2023-08-30 05:13:05,930 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 114 transitions, 381 flow [2023-08-30 05:13:05,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 714.125) internal successors, (5713), 8 states have internal predecessors, (5713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:05,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:13:05,932 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 05:13:05,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 05:13:06,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:13:06,138 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-30 05:13:06,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:13:06,139 INFO L85 PathProgramCache]: Analyzing trace with hash -282431413, now seen corresponding path program 2 times [2023-08-30 05:13:06,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:13:06,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060447767] [2023-08-30 05:13:06,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:13:06,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:13:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:13:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:13:06,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:13:06,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060447767] [2023-08-30 05:13:06,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060447767] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 05:13:06,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079212863] [2023-08-30 05:13:06,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:13:06,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:13:06,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:13:06,389 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 05:13:06,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 05:13:06,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:13:06,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:13:06,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 05:13:06,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:13:06,589 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 05:13:06,589 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 05:13:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:13:06,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:13:06,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079212863] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:13:06,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 05:13:06,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2023-08-30 05:13:06,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905742428] [2023-08-30 05:13:06,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:13:06,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 05:13:06,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:13:06,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 05:13:06,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 05:13:07,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 725 out of 1845 [2023-08-30 05:13:07,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 114 transitions, 381 flow. Second operand has 7 states, 7 states have (on average 725.8571428571429) internal successors, (5081), 7 states have internal predecessors, (5081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:07,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:13:07,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 725 of 1845 [2023-08-30 05:13:07,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:13:32,423 INFO L130 PetriNetUnfolder]: 214054/285904 cut-off events. [2023-08-30 05:13:32,423 INFO L131 PetriNetUnfolder]: For 570/570 co-relation queries the response was YES. [2023-08-30 05:13:32,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573676 conditions, 285904 events. 214054/285904 cut-off events. For 570/570 co-relation queries the response was YES. Maximal size of possible extension queue 11377. Compared 1959645 event pairs, 176535 based on Foata normal form. 3/87795 useless extension candidates. Maximal degree in co-relation 573664. Up to 95300 conditions per place. [2023-08-30 05:13:33,828 INFO L137 encePairwiseOnDemand]: 1836/1845 looper letters, 270 selfloop transitions, 19 changer transitions 0/289 dead transitions. [2023-08-30 05:13:33,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 289 transitions, 1321 flow [2023-08-30 05:13:33,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 05:13:33,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 05:13:33,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 5367 transitions. [2023-08-30 05:13:33,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41556329849012774 [2023-08-30 05:13:33,841 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 5367 transitions. [2023-08-30 05:13:33,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 5367 transitions. [2023-08-30 05:13:33,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:13:33,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 5367 transitions. [2023-08-30 05:13:33,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 766.7142857142857) internal successors, (5367), 7 states have internal predecessors, (5367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:33,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1845.0) internal successors, (14760), 8 states have internal predecessors, (14760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:33,870 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1845.0) internal successors, (14760), 8 states have internal predecessors, (14760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:33,870 INFO L175 Difference]: Start difference. First operand has 100 places, 114 transitions, 381 flow. Second operand 7 states and 5367 transitions. [2023-08-30 05:13:33,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 289 transitions, 1321 flow [2023-08-30 05:13:33,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 289 transitions, 1289 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 05:13:33,875 INFO L231 Difference]: Finished difference. Result has 100 places, 111 transitions, 357 flow [2023-08-30 05:13:33,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=357, PETRI_PLACES=100, PETRI_TRANSITIONS=111} [2023-08-30 05:13:33,876 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -13 predicate places. [2023-08-30 05:13:33,877 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 111 transitions, 357 flow [2023-08-30 05:13:33,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 725.8571428571429) internal successors, (5081), 7 states have internal predecessors, (5081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:33,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:13:33,878 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2023-08-30 05:13:33,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 05:13:34,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-30 05:13:34,083 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-30 05:13:34,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:13:34,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1912003009, now seen corresponding path program 1 times [2023-08-30 05:13:34,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:13:34,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433312359] [2023-08-30 05:13:34,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:13:34,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:13:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:13:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:13:34,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:13:34,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433312359] [2023-08-30 05:13:34,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433312359] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 05:13:34,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021056944] [2023-08-30 05:13:34,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:13:34,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:13:34,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:13:34,211 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 05:13:34,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 05:13:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:13:34,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 05:13:34,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:13:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:13:34,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:13:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:13:34,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021056944] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:13:34,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 05:13:34,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-30 05:13:34,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35827622] [2023-08-30 05:13:34,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 05:13:34,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 05:13:34,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:13:34,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 05:13:34,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2023-08-30 05:13:34,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 725 out of 1845 [2023-08-30 05:13:34,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 111 transitions, 357 flow. Second operand has 11 states, 11 states have (on average 726.4545454545455) internal successors, (7991), 11 states have internal predecessors, (7991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:34,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:13:34,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 725 of 1845 [2023-08-30 05:13:34,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:13:43,112 INFO L130 PetriNetUnfolder]: 71352/95315 cut-off events. [2023-08-30 05:13:43,112 INFO L131 PetriNetUnfolder]: For 189/189 co-relation queries the response was YES. [2023-08-30 05:13:43,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191292 conditions, 95315 events. 71352/95315 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 4074. Compared 578795 event pairs, 58845 based on Foata normal form. 5/29284 useless extension candidates. Maximal degree in co-relation 191281. Up to 95301 conditions per place. [2023-08-30 05:13:43,498 INFO L137 encePairwiseOnDemand]: 1836/1845 looper letters, 92 selfloop transitions, 18 changer transitions 0/110 dead transitions. [2023-08-30 05:13:43,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 110 transitions, 567 flow [2023-08-30 05:13:43,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 05:13:43,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 05:13:43,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 5200 transitions. [2023-08-30 05:13:43,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40263259775454896 [2023-08-30 05:13:43,509 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 5200 transitions. [2023-08-30 05:13:43,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 5200 transitions. [2023-08-30 05:13:43,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:13:43,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 5200 transitions. [2023-08-30 05:13:43,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 742.8571428571429) internal successors, (5200), 7 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:43,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1845.0) internal successors, (14760), 8 states have internal predecessors, (14760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:43,535 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1845.0) internal successors, (14760), 8 states have internal predecessors, (14760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:43,535 INFO L175 Difference]: Start difference. First operand has 100 places, 111 transitions, 357 flow. Second operand 7 states and 5200 transitions. [2023-08-30 05:13:43,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 110 transitions, 567 flow [2023-08-30 05:13:43,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 110 transitions, 530 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-08-30 05:13:43,538 INFO L231 Difference]: Finished difference. Result has 104 places, 110 transitions, 388 flow [2023-08-30 05:13:43,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=388, PETRI_PLACES=104, PETRI_TRANSITIONS=110} [2023-08-30 05:13:43,539 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -9 predicate places. [2023-08-30 05:13:43,539 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 110 transitions, 388 flow [2023-08-30 05:13:43,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 726.4545454545455) internal successors, (7991), 11 states have internal predecessors, (7991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:43,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:13:43,542 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2023-08-30 05:13:43,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 05:13:43,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:13:43,747 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-30 05:13:43,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:13:43,748 INFO L85 PathProgramCache]: Analyzing trace with hash -359831731, now seen corresponding path program 2 times [2023-08-30 05:13:43,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:13:43,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003015774] [2023-08-30 05:13:43,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:13:43,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:13:43,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:13:44,219 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:13:44,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:13:44,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003015774] [2023-08-30 05:13:44,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003015774] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:13:44,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:13:44,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:13:44,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926595751] [2023-08-30 05:13:44,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:13:44,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:13:44,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:13:44,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:13:44,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:13:44,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 729 out of 1845 [2023-08-30 05:13:44,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 110 transitions, 388 flow. Second operand has 4 states, 4 states have (on average 730.75) internal successors, (2923), 4 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:44,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:13:44,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 729 of 1845 [2023-08-30 05:13:44,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:13:51,232 INFO L130 PetriNetUnfolder]: 54076/72890 cut-off events. [2023-08-30 05:13:51,232 INFO L131 PetriNetUnfolder]: For 192/192 co-relation queries the response was YES. [2023-08-30 05:13:51,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146461 conditions, 72890 events. 54076/72890 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 3107. Compared 438501 event pairs, 44405 based on Foata normal form. 0/24247 useless extension candidates. Maximal degree in co-relation 146447. Up to 72890 conditions per place. [2023-08-30 05:13:51,552 INFO L137 encePairwiseOnDemand]: 1842/1845 looper letters, 107 selfloop transitions, 1 changer transitions 0/108 dead transitions. [2023-08-30 05:13:51,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 108 transitions, 590 flow [2023-08-30 05:13:51,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:13:51,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:13:51,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2282 transitions. [2023-08-30 05:13:51,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4122854561878952 [2023-08-30 05:13:51,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2282 transitions. [2023-08-30 05:13:51,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2282 transitions. [2023-08-30 05:13:51,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:13:51,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2282 transitions. [2023-08-30 05:13:51,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 760.6666666666666) internal successors, (2282), 3 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:51,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:51,568 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:51,568 INFO L175 Difference]: Start difference. First operand has 104 places, 110 transitions, 388 flow. Second operand 3 states and 2282 transitions. [2023-08-30 05:13:51,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 108 transitions, 590 flow [2023-08-30 05:13:51,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 108 transitions, 554 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-30 05:13:51,573 INFO L231 Difference]: Finished difference. Result has 100 places, 108 transitions, 340 flow [2023-08-30 05:13:51,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=340, PETRI_PLACES=100, PETRI_TRANSITIONS=108} [2023-08-30 05:13:51,575 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -13 predicate places. [2023-08-30 05:13:51,575 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 108 transitions, 340 flow [2023-08-30 05:13:51,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 730.75) internal successors, (2923), 4 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:51,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:13:51,577 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2023-08-30 05:13:51,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 05:13:51,577 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-30 05:13:51,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:13:51,578 INFO L85 PathProgramCache]: Analyzing trace with hash -359831729, now seen corresponding path program 1 times [2023-08-30 05:13:51,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:13:51,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027455805] [2023-08-30 05:13:51,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:13:51,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:13:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:13:51,999 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-08-30 05:13:51,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:13:52,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027455805] [2023-08-30 05:13:52,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027455805] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:13:52,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:13:52,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:13:52,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337540639] [2023-08-30 05:13:52,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:13:52,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:13:52,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:13:52,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:13:52,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:13:52,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 721 out of 1845 [2023-08-30 05:13:52,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 108 transitions, 340 flow. Second operand has 6 states, 6 states have (on average 722.3333333333334) internal successors, (4334), 6 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:52,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:13:52,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 721 of 1845 [2023-08-30 05:13:52,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:13:57,015 INFO L130 PetriNetUnfolder]: 36800/50465 cut-off events. [2023-08-30 05:13:57,015 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-08-30 05:13:57,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101590 conditions, 50465 events. 36800/50465 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 2226. Compared 303387 event pairs, 29965 based on Foata normal form. 0/19215 useless extension candidates. Maximal degree in co-relation 101575. Up to 50465 conditions per place. [2023-08-30 05:13:57,259 INFO L137 encePairwiseOnDemand]: 1842/1845 looper letters, 105 selfloop transitions, 1 changer transitions 0/106 dead transitions. [2023-08-30 05:13:57,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 106 transitions, 538 flow [2023-08-30 05:13:57,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:13:57,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:13:57,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2256 transitions. [2023-08-30 05:13:57,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075880758807588 [2023-08-30 05:13:57,263 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2256 transitions. [2023-08-30 05:13:57,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2256 transitions. [2023-08-30 05:13:57,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:13:57,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2256 transitions. [2023-08-30 05:13:57,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 752.0) internal successors, (2256), 3 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:57,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:57,273 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:57,274 INFO L175 Difference]: Start difference. First operand has 100 places, 108 transitions, 340 flow. Second operand 3 states and 2256 transitions. [2023-08-30 05:13:57,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 106 transitions, 538 flow [2023-08-30 05:13:57,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 106 transitions, 537 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:13:57,276 INFO L231 Difference]: Finished difference. Result has 99 places, 106 transitions, 327 flow [2023-08-30 05:13:57,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=327, PETRI_PLACES=99, PETRI_TRANSITIONS=106} [2023-08-30 05:13:57,277 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -14 predicate places. [2023-08-30 05:13:57,277 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 106 transitions, 327 flow [2023-08-30 05:13:57,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 722.3333333333334) internal successors, (4334), 6 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:57,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:13:57,278 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-08-30 05:13:57,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 05:13:57,279 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-30 05:13:57,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:13:57,279 INFO L85 PathProgramCache]: Analyzing trace with hash 2094135794, now seen corresponding path program 1 times [2023-08-30 05:13:57,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:13:57,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062821500] [2023-08-30 05:13:57,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:13:57,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:13:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:13:57,606 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-08-30 05:13:57,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:13:57,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062821500] [2023-08-30 05:13:57,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062821500] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:13:57,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:13:57,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:13:57,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416490832] [2023-08-30 05:13:57,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:13:57,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:13:57,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:13:57,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:13:57,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:13:57,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 721 out of 1845 [2023-08-30 05:13:57,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 106 transitions, 327 flow. Second operand has 6 states, 6 states have (on average 722.6666666666666) internal successors, (4336), 6 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:13:57,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:13:57,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 721 of 1845 [2023-08-30 05:13:57,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:14:02,797 INFO L130 PetriNetUnfolder]: 36246/49655 cut-off events. [2023-08-30 05:14:02,797 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-08-30 05:14:02,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99971 conditions, 49655 events. 36246/49655 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 2178. Compared 296219 event pairs, 29511 based on Foata normal form. 0/19073 useless extension candidates. Maximal degree in co-relation 99955. Up to 49655 conditions per place. [2023-08-30 05:14:02,997 INFO L137 encePairwiseOnDemand]: 1842/1845 looper letters, 103 selfloop transitions, 1 changer transitions 0/104 dead transitions. [2023-08-30 05:14:02,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 104 transitions, 531 flow [2023-08-30 05:14:02,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:14:02,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:14:03,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2254 transitions. [2023-08-30 05:14:03,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40722673893405603 [2023-08-30 05:14:03,001 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2254 transitions. [2023-08-30 05:14:03,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2254 transitions. [2023-08-30 05:14:03,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:14:03,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2254 transitions. [2023-08-30 05:14:03,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 751.3333333333334) internal successors, (2254), 3 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:14:03,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:14:03,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:14:03,010 INFO L175 Difference]: Start difference. First operand has 99 places, 106 transitions, 327 flow. Second operand 3 states and 2254 transitions. [2023-08-30 05:14:03,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 104 transitions, 531 flow [2023-08-30 05:14:03,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 104 transitions, 530 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:14:03,013 INFO L231 Difference]: Finished difference. Result has 98 places, 104 transitions, 324 flow [2023-08-30 05:14:03,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=98, PETRI_TRANSITIONS=104} [2023-08-30 05:14:03,014 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -15 predicate places. [2023-08-30 05:14:03,014 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 104 transitions, 324 flow [2023-08-30 05:14:03,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 722.6666666666666) internal successors, (4336), 6 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:14:03,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:14:03,015 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-08-30 05:14:03,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 05:14:03,015 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-30 05:14:03,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:14:03,015 INFO L85 PathProgramCache]: Analyzing trace with hash 2094135793, now seen corresponding path program 1 times [2023-08-30 05:14:03,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:14:03,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269243478] [2023-08-30 05:14:03,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:14:03,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:14:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:14:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-08-30 05:14:03,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:14:03,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269243478] [2023-08-30 05:14:03,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269243478] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 05:14:03,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980957566] [2023-08-30 05:14:03,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:14:03,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:14:03,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:14:03,441 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 05:14:03,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 05:14:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:14:03,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 05:14:03,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:14:03,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:14:03,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:14:03,685 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-08-30 05:14:03,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2023-08-30 05:14:03,699 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 44 treesize of output 42 [2023-08-30 05:14:03,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:14:03,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:14:03,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:14:03,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:14:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:14:03,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:14:03,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980957566] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:14:03,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 05:14:03,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2023-08-30 05:14:03,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863841395] [2023-08-30 05:14:03,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:14:03,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:14:03,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:14:03,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:14:03,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-08-30 05:14:04,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 735 out of 1845 [2023-08-30 05:14:04,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 104 transitions, 324 flow. Second operand has 4 states, 4 states have (on average 737.25) internal successors, (2949), 4 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:14:04,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:14:04,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 735 of 1845 [2023-08-30 05:14:04,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:14:08,671 INFO L130 PetriNetUnfolder]: 35692/48845 cut-off events. [2023-08-30 05:14:08,671 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-08-30 05:14:08,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98352 conditions, 48845 events. 35692/48845 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 2184. Compared 291352 event pairs, 29057 based on Foata normal form. 0/18931 useless extension candidates. Maximal degree in co-relation 98335. Up to 48845 conditions per place. [2023-08-30 05:14:08,905 INFO L137 encePairwiseOnDemand]: 1842/1845 looper letters, 101 selfloop transitions, 1 changer transitions 0/102 dead transitions. [2023-08-30 05:14:08,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 102 transitions, 524 flow [2023-08-30 05:14:08,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:14:08,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:14:08,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2294 transitions. [2023-08-30 05:14:08,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41445347786811204 [2023-08-30 05:14:08,908 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2294 transitions. [2023-08-30 05:14:08,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2294 transitions. [2023-08-30 05:14:08,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:14:08,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2294 transitions. [2023-08-30 05:14:08,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 764.6666666666666) internal successors, (2294), 3 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:14:08,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:14:08,917 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:14:08,917 INFO L175 Difference]: Start difference. First operand has 98 places, 104 transitions, 324 flow. Second operand 3 states and 2294 transitions. [2023-08-30 05:14:08,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 102 transitions, 524 flow [2023-08-30 05:14:08,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 102 transitions, 523 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:14:08,920 INFO L231 Difference]: Finished difference. Result has 97 places, 102 transitions, 321 flow [2023-08-30 05:14:08,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=321, PETRI_PLACES=97, PETRI_TRANSITIONS=102} [2023-08-30 05:14:08,920 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -16 predicate places. [2023-08-30 05:14:08,921 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 102 transitions, 321 flow [2023-08-30 05:14:08,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 737.25) internal successors, (2949), 4 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:14:08,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:14:08,921 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:14:08,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 05:14:09,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:14:09,128 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-30 05:14:09,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:14:09,128 INFO L85 PathProgramCache]: Analyzing trace with hash 493713100, now seen corresponding path program 1 times [2023-08-30 05:14:09,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:14:09,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036615833] [2023-08-30 05:14:09,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:14:09,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:14:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:14:09,484 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 05:14:09,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:14:09,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036615833] [2023-08-30 05:14:09,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036615833] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 05:14:09,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820919776] [2023-08-30 05:14:09,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:14:09,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 05:14:09,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:14:09,489 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 05:14:09,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 05:14:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:14:09,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 05:14:09,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:14:09,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 05:14:09,816 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-30 05:14:09,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:14:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 05:14:09,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:14:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 05:14:10,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820919776] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 05:14:10,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:14:10,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2023-08-30 05:14:10,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531974982] [2023-08-30 05:14:10,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:14:10,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 05:14:10,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:14:10,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 05:14:10,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2023-08-30 05:14:11,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 708 out of 1845 [2023-08-30 05:14:11,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 102 transitions, 321 flow. Second operand has 10 states, 10 states have (on average 709.4) internal successors, (7094), 10 states have internal predecessors, (7094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:14:11,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:14:11,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 708 of 1845 [2023-08-30 05:14:11,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:14:20,106 INFO L130 PetriNetUnfolder]: 64726/88717 cut-off events. [2023-08-30 05:14:20,106 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-08-30 05:14:20,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178583 conditions, 88717 events. 64726/88717 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 2068. Compared 565802 event pairs, 29057 based on Foata normal form. 0/34905 useless extension candidates. Maximal degree in co-relation 178565. Up to 48257 conditions per place. [2023-08-30 05:14:20,583 INFO L137 encePairwiseOnDemand]: 1837/1845 looper letters, 171 selfloop transitions, 5 changer transitions 0/176 dead transitions. [2023-08-30 05:14:20,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 176 transitions, 826 flow [2023-08-30 05:14:20,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:14:20,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:14:20,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3704 transitions. [2023-08-30 05:14:20,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40151761517615175 [2023-08-30 05:14:20,588 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3704 transitions. [2023-08-30 05:14:20,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3704 transitions. [2023-08-30 05:14:20,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:14:20,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3704 transitions. [2023-08-30 05:14:20,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 740.8) internal successors, (3704), 5 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:14:20,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1845.0) internal successors, (11070), 6 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:14:20,601 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1845.0) internal successors, (11070), 6 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:14:20,601 INFO L175 Difference]: Start difference. First operand has 97 places, 102 transitions, 321 flow. Second operand 5 states and 3704 transitions. [2023-08-30 05:14:20,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 176 transitions, 826 flow [2023-08-30 05:14:20,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 176 transitions, 825 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:14:20,605 INFO L231 Difference]: Finished difference. Result has 102 places, 104 transitions, 351 flow [2023-08-30 05:14:20,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=351, PETRI_PLACES=102, PETRI_TRANSITIONS=104} [2023-08-30 05:14:20,605 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -11 predicate places. [2023-08-30 05:14:20,606 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 104 transitions, 351 flow [2023-08-30 05:14:20,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 709.4) internal successors, (7094), 10 states have internal predecessors, (7094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:14:20,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:14:20,607 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:14:20,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 05:14:20,817 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,SelfDestructingSolverStorable9 [2023-08-30 05:14:20,817 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-30 05:14:20,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:14:20,817 INFO L85 PathProgramCache]: Analyzing trace with hash 493713097, now seen corresponding path program 1 times [2023-08-30 05:14:20,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:14:20,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031465130] [2023-08-30 05:14:20,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:14:20,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:14:20,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:14:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-08-30 05:14:20,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:14:20,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031465130] [2023-08-30 05:14:20,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031465130] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:14:20,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:14:20,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:14:20,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765912546] [2023-08-30 05:14:20,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:14:20,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:14:20,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:14:20,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:14:20,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:14:21,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 1845 [2023-08-30 05:14:21,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 104 transitions, 351 flow. Second operand has 5 states, 5 states have (on average 712.4) internal successors, (3562), 5 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:14:21,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:14:21,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 1845 [2023-08-30 05:14:21,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand