./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_81-list_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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/goblint-regression/28-race_reach_81-list_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3de6ec2acea23c0ab47fbc2e02ad0931145060ca78b80531ef692b3505f9553b --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:03:18,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:03:18,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:03:18,880 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:03:18,882 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:03:18,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:03:18,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:03:18,888 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:03:18,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:03:18,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:03:18,893 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:03:18,895 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:03:18,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:03:18,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:03:18,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:03:18,902 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:03:18,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:03:18,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:03:18,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:03:18,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:03:18,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:03:18,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:03:18,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:03:18,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:03:18,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:03:18,937 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:03:18,937 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:03:18,938 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:03:18,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:03:18,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:03:18,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:03:18,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:03:18,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:03:18,940 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:03:18,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:03:18,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:03:18,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:03:18,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:03:18,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:03:18,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:03:18,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:03:18,944 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 22:03:18,971 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:03:18,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:03:18,972 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:03:18,972 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:03:18,973 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:03:18,973 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:03:18,974 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:03:18,974 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:03:18,974 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:03:18,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:03:18,975 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:03:18,975 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:03:18,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:03:18,975 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:03:18,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:03:18,976 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:03:18,976 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:03:18,976 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:03:18,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:03:18,978 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:03:18,978 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:03:18,981 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:03:18,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:03:18,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:03:18,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:03:18,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:03:18,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:03:18,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:03:18,984 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 22:03:18,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 22:03:18,984 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:03:18,984 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:03:18,985 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:03:18,985 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:03:18,985 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3de6ec2acea23c0ab47fbc2e02ad0931145060ca78b80531ef692b3505f9553b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:03:19,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:03:19,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:03:19,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:03:19,273 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:03:19,273 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:03:19,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_81-list_racing.i [2023-08-29 22:03:20,238 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:03:20,485 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:03:20,485 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_81-list_racing.i [2023-08-29 22:03:20,504 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15b182f85/2114c865b88a428ba4a23abb4950e6b3/FLAGe646feb80 [2023-08-29 22:03:20,514 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15b182f85/2114c865b88a428ba4a23abb4950e6b3 [2023-08-29 22:03:20,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:03:20,516 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:03:20,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:03:20,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:03:20,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:03:20,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:03:20" (1/1) ... [2023-08-29 22:03:20,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49a74da0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:20, skipping insertion in model container [2023-08-29 22:03:20,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:03:20" (1/1) ... [2023-08-29 22:03:20,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:03:20,560 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:03:20,843 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_81-list_racing.i[47038,47051] [2023-08-29 22:03:20,880 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:03:20,892 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 22:03:20,917 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_81-list_racing.i[47038,47051] [2023-08-29 22:03:20,924 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:03:20,980 INFO L208 MainTranslator]: Completed translation [2023-08-29 22:03:20,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:20 WrapperNode [2023-08-29 22:03:20,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:03:20,981 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 22:03:20,982 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 22:03:20,982 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 22:03:20,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:20" (1/1) ... [2023-08-29 22:03:21,009 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:20" (1/1) ... [2023-08-29 22:03:21,040 INFO L138 Inliner]: procedures = 278, calls = 54, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 206 [2023-08-29 22:03:21,041 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 22:03:21,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 22:03:21,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 22:03:21,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 22:03:21,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:20" (1/1) ... [2023-08-29 22:03:21,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:20" (1/1) ... [2023-08-29 22:03:21,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:20" (1/1) ... [2023-08-29 22:03:21,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:20" (1/1) ... [2023-08-29 22:03:21,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:20" (1/1) ... [2023-08-29 22:03:21,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:20" (1/1) ... [2023-08-29 22:03:21,083 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:20" (1/1) ... [2023-08-29 22:03:21,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:20" (1/1) ... [2023-08-29 22:03:21,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 22:03:21,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 22:03:21,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 22:03:21,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 22:03:21,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:20" (1/1) ... [2023-08-29 22:03:21,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:03:21,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:03:21,133 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) [2023-08-29 22:03:21,153 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 [2023-08-29 22:03:21,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 22:03:21,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-29 22:03:21,178 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-29 22:03:21,179 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-29 22:03:21,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 22:03:21,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 22:03:21,179 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-29 22:03:21,179 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-29 22:03:21,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 22:03:21,179 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 22:03:21,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 22:03:21,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 22:03:21,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-29 22:03:21,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 22:03:21,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 22:03:21,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 22:03:21,181 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 22:03:21,302 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 22:03:21,303 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 22:03:21,653 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 22:03:21,660 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 22:03:21,666 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-08-29 22:03:21,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:03:21 BoogieIcfgContainer [2023-08-29 22:03:21,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 22:03:21,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 22:03:21,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 22:03:21,671 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 22:03:21,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:03:20" (1/3) ... [2023-08-29 22:03:21,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc890c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:03:21, skipping insertion in model container [2023-08-29 22:03:21,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:20" (2/3) ... [2023-08-29 22:03:21,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc890c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:03:21, skipping insertion in model container [2023-08-29 22:03:21,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:03:21" (3/3) ... [2023-08-29 22:03:21,674 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_81-list_racing.i [2023-08-29 22:03:21,684 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 22:03:21,685 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-08-29 22:03:21,685 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 22:03:21,800 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-29 22:03:21,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 249 transitions, 520 flow [2023-08-29 22:03:21,919 INFO L130 PetriNetUnfolder]: 52/481 cut-off events. [2023-08-29 22:03:21,919 INFO L131 PetriNetUnfolder]: For 8/15 co-relation queries the response was YES. [2023-08-29 22:03:21,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 481 events. 52/481 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2230 event pairs, 0 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 244. Up to 8 conditions per place. [2023-08-29 22:03:21,935 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 249 transitions, 520 flow [2023-08-29 22:03:21,941 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 249 transitions, 520 flow [2023-08-29 22:03:21,943 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:03:21,949 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 231 places, 249 transitions, 520 flow [2023-08-29 22:03:21,952 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 231 places, 249 transitions, 520 flow [2023-08-29 22:03:21,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 249 transitions, 520 flow [2023-08-29 22:03:22,046 INFO L130 PetriNetUnfolder]: 52/481 cut-off events. [2023-08-29 22:03:22,046 INFO L131 PetriNetUnfolder]: For 8/15 co-relation queries the response was YES. [2023-08-29 22:03:22,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 481 events. 52/481 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2230 event pairs, 0 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 244. Up to 8 conditions per place. [2023-08-29 22:03:22,060 INFO L119 LiptonReduction]: Number of co-enabled transitions 20328 [2023-08-29 22:03:27,687 INFO L134 LiptonReduction]: Checked pairs total: 61398 [2023-08-29 22:03:27,687 INFO L136 LiptonReduction]: Total number of compositions: 203 [2023-08-29 22:03:27,705 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:03:27,711 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;@123c00ac, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:03:27,712 INFO L358 AbstractCegarLoop]: Starting to check reachability of 63 error locations. [2023-08-29 22:03:27,723 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 22:03:27,724 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:03:27,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:27,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 22:03:27,725 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-29 22:03:27,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:27,731 INFO L85 PathProgramCache]: Analyzing trace with hash 962, now seen corresponding path program 1 times [2023-08-29 22:03:27,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:27,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229287421] [2023-08-29 22:03:27,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:27,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:27,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:27,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:27,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229287421] [2023-08-29 22:03:27,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229287421] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:27,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:27,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 22:03:27,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965560452] [2023-08-29 22:03:27,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:27,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 22:03:27,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:27,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 22:03:27,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 22:03:27,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 452 [2023-08-29 22:03:27,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 103 transitions, 228 flow. Second operand has 2 states, 2 states have (on average 226.5) internal successors, (453), 2 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:27,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:27,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 452 [2023-08-29 22:03:27,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:28,688 INFO L130 PetriNetUnfolder]: 6848/13016 cut-off events. [2023-08-29 22:03:28,688 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2023-08-29 22:03:28,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23748 conditions, 13016 events. 6848/13016 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 107405 event pairs, 6456 based on Foata normal form. 648/8158 useless extension candidates. Maximal degree in co-relation 21691. Up to 10632 conditions per place. [2023-08-29 22:03:28,738 INFO L137 encePairwiseOnDemand]: 437/452 looper letters, 60 selfloop transitions, 0 changer transitions 0/88 dead transitions. [2023-08-29 22:03:28,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 88 transitions, 318 flow [2023-08-29 22:03:28,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 22:03:28,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 22:03:28,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 527 transitions. [2023-08-29 22:03:28,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5829646017699115 [2023-08-29 22:03:28,752 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 527 transitions. [2023-08-29 22:03:28,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 527 transitions. [2023-08-29 22:03:28,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:28,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 527 transitions. [2023-08-29 22:03:28,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 263.5) internal successors, (527), 2 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:28,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 452.0) internal successors, (1356), 3 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:28,773 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 452.0) internal successors, (1356), 3 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:28,774 INFO L175 Difference]: Start difference. First operand has 91 places, 103 transitions, 228 flow. Second operand 2 states and 527 transitions. [2023-08-29 22:03:28,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 88 transitions, 318 flow [2023-08-29 22:03:28,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 88 transitions, 318 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 22:03:28,781 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 198 flow [2023-08-29 22:03:28,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=198, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2023-08-29 22:03:28,784 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -3 predicate places. [2023-08-29 22:03:28,784 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 198 flow [2023-08-29 22:03:28,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 226.5) internal successors, (453), 2 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:28,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:28,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:03:28,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 22:03:28,785 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-29 22:03:28,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:28,785 INFO L85 PathProgramCache]: Analyzing trace with hash 30624, now seen corresponding path program 1 times [2023-08-29 22:03:28,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:28,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245714965] [2023-08-29 22:03:28,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:28,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:28,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:28,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245714965] [2023-08-29 22:03:28,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245714965] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:28,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:28,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:03:28,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075879497] [2023-08-29 22:03:28,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:28,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:03:28,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:28,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:03:28,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:03:29,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 452 [2023-08-29 22:03:29,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:29,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:29,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 452 [2023-08-29 22:03:29,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:29,896 INFO L130 PetriNetUnfolder]: 6726/12320 cut-off events. [2023-08-29 22:03:29,896 INFO L131 PetriNetUnfolder]: For 158/158 co-relation queries the response was YES. [2023-08-29 22:03:29,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22815 conditions, 12320 events. 6726/12320 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 95616 event pairs, 5979 based on Foata normal form. 0/7311 useless extension candidates. Maximal degree in co-relation 22810. Up to 10391 conditions per place. [2023-08-29 22:03:29,936 INFO L137 encePairwiseOnDemand]: 447/452 looper letters, 61 selfloop transitions, 3 changer transitions 0/92 dead transitions. [2023-08-29 22:03:29,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 92 transitions, 334 flow [2023-08-29 22:03:29,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:03:29,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:03:29,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 723 transitions. [2023-08-29 22:03:29,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331858407079646 [2023-08-29 22:03:29,939 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 723 transitions. [2023-08-29 22:03:29,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 723 transitions. [2023-08-29 22:03:29,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:29,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 723 transitions. [2023-08-29 22:03:29,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:29,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:29,945 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:29,945 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 198 flow. Second operand 3 states and 723 transitions. [2023-08-29 22:03:29,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 92 transitions, 334 flow [2023-08-29 22:03:29,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 92 transitions, 334 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 22:03:29,949 INFO L231 Difference]: Finished difference. Result has 91 places, 90 transitions, 219 flow [2023-08-29 22:03:29,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=91, PETRI_TRANSITIONS=90} [2023-08-29 22:03:29,950 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, 0 predicate places. [2023-08-29 22:03:29,950 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 90 transitions, 219 flow [2023-08-29 22:03:29,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:29,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:29,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:03:29,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 22:03:29,951 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-29 22:03:29,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:29,952 INFO L85 PathProgramCache]: Analyzing trace with hash 30625, now seen corresponding path program 1 times [2023-08-29 22:03:29,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:29,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452433294] [2023-08-29 22:03:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:29,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:30,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:30,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:30,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452433294] [2023-08-29 22:03:30,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452433294] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:30,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:30,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:03:30,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100577655] [2023-08-29 22:03:30,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:30,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:03:30,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:30,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:03:30,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:03:30,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 452 [2023-08-29 22:03:30,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 90 transitions, 219 flow. Second operand has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:30,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:30,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 452 [2023-08-29 22:03:30,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:30,900 INFO L130 PetriNetUnfolder]: 6256/11603 cut-off events. [2023-08-29 22:03:30,901 INFO L131 PetriNetUnfolder]: For 532/532 co-relation queries the response was YES. [2023-08-29 22:03:30,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21815 conditions, 11603 events. 6256/11603 cut-off events. For 532/532 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 91344 event pairs, 4420 based on Foata normal form. 0/6971 useless extension candidates. Maximal degree in co-relation 21808. Up to 7728 conditions per place. [2023-08-29 22:03:30,945 INFO L137 encePairwiseOnDemand]: 448/452 looper letters, 89 selfloop transitions, 2 changer transitions 0/119 dead transitions. [2023-08-29 22:03:30,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 119 transitions, 461 flow [2023-08-29 22:03:30,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:03:30,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:03:30,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 742 transitions. [2023-08-29 22:03:30,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5471976401179941 [2023-08-29 22:03:30,947 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 742 transitions. [2023-08-29 22:03:30,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 742 transitions. [2023-08-29 22:03:30,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:30,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 742 transitions. [2023-08-29 22:03:30,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.33333333333334) internal successors, (742), 3 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:30,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:30,952 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:30,952 INFO L175 Difference]: Start difference. First operand has 91 places, 90 transitions, 219 flow. Second operand 3 states and 742 transitions. [2023-08-29 22:03:30,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 119 transitions, 461 flow [2023-08-29 22:03:30,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 119 transitions, 458 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:03:30,958 INFO L231 Difference]: Finished difference. Result has 90 places, 88 transitions, 216 flow [2023-08-29 22:03:30,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=90, PETRI_TRANSITIONS=88} [2023-08-29 22:03:30,959 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -1 predicate places. [2023-08-29 22:03:30,959 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 88 transitions, 216 flow [2023-08-29 22:03:30,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:30,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:30,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 22:03:30,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 22:03:30,960 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-29 22:03:30,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:30,961 INFO L85 PathProgramCache]: Analyzing trace with hash 913012262, now seen corresponding path program 1 times [2023-08-29 22:03:30,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:30,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754099631] [2023-08-29 22:03:30,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:30,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:30,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:31,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:31,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754099631] [2023-08-29 22:03:31,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754099631] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:31,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:31,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:03:31,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188554720] [2023-08-29 22:03:31,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:31,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:03:31,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:31,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:03:31,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:03:31,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 452 [2023-08-29 22:03:31,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 88 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:31,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:31,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 452 [2023-08-29 22:03:31,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:31,979 INFO L130 PetriNetUnfolder]: 8211/15154 cut-off events. [2023-08-29 22:03:31,982 INFO L131 PetriNetUnfolder]: For 774/774 co-relation queries the response was YES. [2023-08-29 22:03:32,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28696 conditions, 15154 events. 8211/15154 cut-off events. For 774/774 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 122814 event pairs, 5824 based on Foata normal form. 0/9718 useless extension candidates. Maximal degree in co-relation 28689. Up to 9647 conditions per place. [2023-08-29 22:03:32,060 INFO L137 encePairwiseOnDemand]: 445/452 looper letters, 110 selfloop transitions, 6 changer transitions 0/141 dead transitions. [2023-08-29 22:03:32,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 141 transitions, 569 flow [2023-08-29 22:03:32,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:03:32,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:03:32,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 771 transitions. [2023-08-29 22:03:32,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5685840707964602 [2023-08-29 22:03:32,063 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 771 transitions. [2023-08-29 22:03:32,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 771 transitions. [2023-08-29 22:03:32,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:32,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 771 transitions. [2023-08-29 22:03:32,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:32,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:32,068 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:32,068 INFO L175 Difference]: Start difference. First operand has 90 places, 88 transitions, 216 flow. Second operand 3 states and 771 transitions. [2023-08-29 22:03:32,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 141 transitions, 569 flow [2023-08-29 22:03:32,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 141 transitions, 563 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:03:32,072 INFO L231 Difference]: Finished difference. Result has 92 places, 92 transitions, 256 flow [2023-08-29 22:03:32,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=92, PETRI_TRANSITIONS=92} [2023-08-29 22:03:32,073 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, 1 predicate places. [2023-08-29 22:03:32,073 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 92 transitions, 256 flow [2023-08-29 22:03:32,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:32,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:32,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 22:03:32,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 22:03:32,075 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-29 22:03:32,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:32,075 INFO L85 PathProgramCache]: Analyzing trace with hash 913012263, now seen corresponding path program 1 times [2023-08-29 22:03:32,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:32,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42828174] [2023-08-29 22:03:32,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:32,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:32,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:32,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42828174] [2023-08-29 22:03:32,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42828174] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:32,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:32,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:03:32,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79517315] [2023-08-29 22:03:32,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:32,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:03:32,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:32,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:03:32,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:03:32,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 452 [2023-08-29 22:03:32,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 92 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:32,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:32,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 452 [2023-08-29 22:03:32,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:33,956 INFO L130 PetriNetUnfolder]: 15439/28840 cut-off events. [2023-08-29 22:03:33,956 INFO L131 PetriNetUnfolder]: For 6946/7716 co-relation queries the response was YES. [2023-08-29 22:03:33,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57953 conditions, 28840 events. 15439/28840 cut-off events. For 6946/7716 co-relation queries the response was YES. Maximal size of possible extension queue 1363. Compared 267765 event pairs, 8077 based on Foata normal form. 938/19380 useless extension candidates. Maximal degree in co-relation 57945. Up to 13223 conditions per place. [2023-08-29 22:03:34,070 INFO L137 encePairwiseOnDemand]: 448/452 looper letters, 118 selfloop transitions, 3 changer transitions 0/148 dead transitions. [2023-08-29 22:03:34,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 148 transitions, 645 flow [2023-08-29 22:03:34,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:03:34,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:03:34,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 777 transitions. [2023-08-29 22:03:34,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5730088495575221 [2023-08-29 22:03:34,073 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 777 transitions. [2023-08-29 22:03:34,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 777 transitions. [2023-08-29 22:03:34,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:34,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 777 transitions. [2023-08-29 22:03:34,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:34,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:34,077 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:34,077 INFO L175 Difference]: Start difference. First operand has 92 places, 92 transitions, 256 flow. Second operand 3 states and 777 transitions. [2023-08-29 22:03:34,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 148 transitions, 645 flow [2023-08-29 22:03:34,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 148 transitions, 627 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:03:34,083 INFO L231 Difference]: Finished difference. Result has 93 places, 93 transitions, 263 flow [2023-08-29 22:03:34,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=93, PETRI_TRANSITIONS=93} [2023-08-29 22:03:34,084 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, 2 predicate places. [2023-08-29 22:03:34,084 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 93 transitions, 263 flow [2023-08-29 22:03:34,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:34,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:34,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 22:03:34,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 22:03:34,085 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-29 22:03:34,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:34,086 INFO L85 PathProgramCache]: Analyzing trace with hash 913012647, now seen corresponding path program 1 times [2023-08-29 22:03:34,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:34,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958201876] [2023-08-29 22:03:34,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:34,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:34,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:34,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958201876] [2023-08-29 22:03:34,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958201876] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:03:34,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090082581] [2023-08-29 22:03:34,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:34,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:34,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:03:34,152 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) [2023-08-29 22:03:34,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 22:03:34,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:34,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:03:34,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:03:34,274 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 22:03:34,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-08-29 22:03:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:34,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:03:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:34,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090082581] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:03:34,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:03:34,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 22:03:34,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759478307] [2023-08-29 22:03:34,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:03:34,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 22:03:34,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:34,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 22:03:34,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 22:03:34,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 452 [2023-08-29 22:03:34,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 93 transitions, 263 flow. Second operand has 8 states, 8 states have (on average 215.875) internal successors, (1727), 8 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:34,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:34,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 452 [2023-08-29 22:03:34,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:35,365 INFO L130 PetriNetUnfolder]: 6609/12308 cut-off events. [2023-08-29 22:03:35,366 INFO L131 PetriNetUnfolder]: For 1259/1745 co-relation queries the response was YES. [2023-08-29 22:03:35,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23957 conditions, 12308 events. 6609/12308 cut-off events. For 1259/1745 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 100013 event pairs, 3513 based on Foata normal form. 76/7893 useless extension candidates. Maximal degree in co-relation 23948. Up to 10274 conditions per place. [2023-08-29 22:03:35,421 INFO L137 encePairwiseOnDemand]: 447/452 looper letters, 71 selfloop transitions, 6 changer transitions 0/106 dead transitions. [2023-08-29 22:03:35,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 106 transitions, 439 flow [2023-08-29 22:03:35,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:03:35,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:03:35,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1362 transitions. [2023-08-29 22:03:35,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5022123893805309 [2023-08-29 22:03:35,424 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1362 transitions. [2023-08-29 22:03:35,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1362 transitions. [2023-08-29 22:03:35,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:35,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1362 transitions. [2023-08-29 22:03:35,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:35,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 452.0) internal successors, (3164), 7 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:35,447 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 452.0) internal successors, (3164), 7 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:35,447 INFO L175 Difference]: Start difference. First operand has 93 places, 93 transitions, 263 flow. Second operand 6 states and 1362 transitions. [2023-08-29 22:03:35,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 106 transitions, 439 flow [2023-08-29 22:03:35,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 106 transitions, 436 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:03:35,451 INFO L231 Difference]: Finished difference. Result has 96 places, 90 transitions, 258 flow [2023-08-29 22:03:35,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=96, PETRI_TRANSITIONS=90} [2023-08-29 22:03:35,454 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, 5 predicate places. [2023-08-29 22:03:35,455 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 90 transitions, 258 flow [2023-08-29 22:03:35,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 215.875) internal successors, (1727), 8 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:35,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:35,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:35,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-29 22:03:35,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-29 22:03:35,661 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-29 22:03:35,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:35,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1231687440, now seen corresponding path program 1 times [2023-08-29 22:03:35,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:35,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202434414] [2023-08-29 22:03:35,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:35,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:35,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:35,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:35,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202434414] [2023-08-29 22:03:35,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202434414] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:03:35,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863055109] [2023-08-29 22:03:35,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:35,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:35,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:03:35,706 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) [2023-08-29 22:03:35,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 22:03:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:35,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 22:03:35,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:03:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:35,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:03:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:35,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863055109] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:03:35,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:03:35,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-29 22:03:35,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541058994] [2023-08-29 22:03:35,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:03:35,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 22:03:35,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:35,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 22:03:35,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 22:03:35,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 452 [2023-08-29 22:03:35,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 90 transitions, 258 flow. Second operand has 7 states, 7 states have (on average 223.57142857142858) internal successors, (1565), 7 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:35,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:35,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 452 [2023-08-29 22:03:35,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:35,860 INFO L130 PetriNetUnfolder]: 16/65 cut-off events. [2023-08-29 22:03:35,860 INFO L131 PetriNetUnfolder]: For 83/83 co-relation queries the response was YES. [2023-08-29 22:03:35,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 65 events. 16/65 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 196 event pairs, 8 based on Foata normal form. 8/57 useless extension candidates. Maximal degree in co-relation 152. Up to 34 conditions per place. [2023-08-29 22:03:35,861 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 17 selfloop transitions, 3 changer transitions 2/29 dead transitions. [2023-08-29 22:03:35,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 29 transitions, 141 flow [2023-08-29 22:03:35,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:03:35,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:03:35,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 906 transitions. [2023-08-29 22:03:35,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5011061946902655 [2023-08-29 22:03:35,863 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 906 transitions. [2023-08-29 22:03:35,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 906 transitions. [2023-08-29 22:03:35,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:35,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 906 transitions. [2023-08-29 22:03:35,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 226.5) internal successors, (906), 4 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:35,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 452.0) internal successors, (2260), 5 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:35,868 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 452.0) internal successors, (2260), 5 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:35,868 INFO L175 Difference]: Start difference. First operand has 96 places, 90 transitions, 258 flow. Second operand 4 states and 906 transitions. [2023-08-29 22:03:35,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 29 transitions, 141 flow [2023-08-29 22:03:35,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 118 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-29 22:03:35,869 INFO L231 Difference]: Finished difference. Result has 32 places, 20 transitions, 62 flow [2023-08-29 22:03:35,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=62, PETRI_PLACES=32, PETRI_TRANSITIONS=20} [2023-08-29 22:03:35,870 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -59 predicate places. [2023-08-29 22:03:35,870 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 20 transitions, 62 flow [2023-08-29 22:03:35,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 223.57142857142858) internal successors, (1565), 7 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:35,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:35,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:35,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-29 22:03:36,076 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,SelfDestructingSolverStorable6 [2023-08-29 22:03:36,076 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-29 22:03:36,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:36,076 INFO L85 PathProgramCache]: Analyzing trace with hash -478775231, now seen corresponding path program 1 times [2023-08-29 22:03:36,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:36,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284573201] [2023-08-29 22:03:36,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:36,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:36,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:36,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284573201] [2023-08-29 22:03:36,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284573201] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:36,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:36,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:03:36,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098087953] [2023-08-29 22:03:36,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:36,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:03:36,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:36,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:03:36,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:03:36,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 452 [2023-08-29 22:03:36,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 20 transitions, 62 flow. Second operand has 6 states, 6 states have (on average 216.16666666666666) internal successors, (1297), 6 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:36,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:36,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 452 [2023-08-29 22:03:36,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:36,782 INFO L130 PetriNetUnfolder]: 12/51 cut-off events. [2023-08-29 22:03:36,782 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-29 22:03:36,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 51 events. 12/51 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 127 event pairs, 1 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 111. Up to 20 conditions per place. [2023-08-29 22:03:36,782 INFO L137 encePairwiseOnDemand]: 447/452 looper letters, 13 selfloop transitions, 3 changer transitions 0/22 dead transitions. [2023-08-29 22:03:36,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 22 transitions, 106 flow [2023-08-29 22:03:36,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:03:36,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:03:36,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1091 transitions. [2023-08-29 22:03:36,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827433628318584 [2023-08-29 22:03:36,785 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1091 transitions. [2023-08-29 22:03:36,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1091 transitions. [2023-08-29 22:03:36,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:36,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1091 transitions. [2023-08-29 22:03:36,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 218.2) internal successors, (1091), 5 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:36,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 452.0) internal successors, (2712), 6 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:36,789 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 452.0) internal successors, (2712), 6 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:36,789 INFO L175 Difference]: Start difference. First operand has 32 places, 20 transitions, 62 flow. Second operand 5 states and 1091 transitions. [2023-08-29 22:03:36,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 22 transitions, 106 flow [2023-08-29 22:03:36,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 22 transitions, 100 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:03:36,792 INFO L231 Difference]: Finished difference. Result has 31 places, 18 transitions, 60 flow [2023-08-29 22:03:36,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=60, PETRI_PLACES=31, PETRI_TRANSITIONS=18} [2023-08-29 22:03:36,794 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -60 predicate places. [2023-08-29 22:03:36,795 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 18 transitions, 60 flow [2023-08-29 22:03:36,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 216.16666666666666) internal successors, (1297), 6 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:36,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:36,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:36,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 22:03:36,796 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-29 22:03:36,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:36,797 INFO L85 PathProgramCache]: Analyzing trace with hash -478775232, now seen corresponding path program 1 times [2023-08-29 22:03:36,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:36,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128418419] [2023-08-29 22:03:36,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:36,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:36,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:36,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:36,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128418419] [2023-08-29 22:03:36,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128418419] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:36,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:36,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 22:03:36,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074659244] [2023-08-29 22:03:36,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:36,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 22:03:36,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:36,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 22:03:36,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-29 22:03:37,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 452 [2023-08-29 22:03:37,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 18 transitions, 60 flow. Second operand has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:37,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:37,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 452 [2023-08-29 22:03:37,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:37,433 INFO L130 PetriNetUnfolder]: 12/45 cut-off events. [2023-08-29 22:03:37,433 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 22:03:37,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 45 events. 12/45 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 87 event pairs, 1 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 111. Up to 15 conditions per place. [2023-08-29 22:03:37,433 INFO L137 encePairwiseOnDemand]: 446/452 looper letters, 12 selfloop transitions, 5 changer transitions 0/21 dead transitions. [2023-08-29 22:03:37,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 21 transitions, 106 flow [2023-08-29 22:03:37,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:03:37,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:03:37,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1248 transitions. [2023-08-29 22:03:37,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46017699115044247 [2023-08-29 22:03:37,435 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1248 transitions. [2023-08-29 22:03:37,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1248 transitions. [2023-08-29 22:03:37,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:37,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1248 transitions. [2023-08-29 22:03:37,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 208.0) internal successors, (1248), 6 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:37,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 452.0) internal successors, (3164), 7 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:37,440 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 452.0) internal successors, (3164), 7 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:37,441 INFO L175 Difference]: Start difference. First operand has 31 places, 18 transitions, 60 flow. Second operand 6 states and 1248 transitions. [2023-08-29 22:03:37,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 21 transitions, 106 flow [2023-08-29 22:03:37,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 21 transitions, 101 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:03:37,441 INFO L231 Difference]: Finished difference. Result has 31 places, 16 transitions, 61 flow [2023-08-29 22:03:37,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=61, PETRI_PLACES=31, PETRI_TRANSITIONS=16} [2023-08-29 22:03:37,441 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -60 predicate places. [2023-08-29 22:03:37,442 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 16 transitions, 61 flow [2023-08-29 22:03:37,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:37,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:37,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:37,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 22:03:37,442 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-29 22:03:37,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:37,442 INFO L85 PathProgramCache]: Analyzing trace with hash -541394977, now seen corresponding path program 1 times [2023-08-29 22:03:37,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:37,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219616585] [2023-08-29 22:03:37,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:37,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:37,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:37,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219616585] [2023-08-29 22:03:37,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219616585] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:37,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:37,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:03:37,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088702318] [2023-08-29 22:03:37,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:37,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:03:37,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:37,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:03:37,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:03:37,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 452 [2023-08-29 22:03:37,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 16 transitions, 61 flow. Second operand has 6 states, 6 states have (on average 213.66666666666666) internal successors, (1282), 6 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:37,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:37,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 452 [2023-08-29 22:03:37,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:37,745 INFO L130 PetriNetUnfolder]: 14/44 cut-off events. [2023-08-29 22:03:37,745 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-29 22:03:37,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 44 events. 14/44 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 74 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 123. Up to 20 conditions per place. [2023-08-29 22:03:37,746 INFO L137 encePairwiseOnDemand]: 448/452 looper letters, 13 selfloop transitions, 4 changer transitions 1/20 dead transitions. [2023-08-29 22:03:37,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 20 transitions, 111 flow [2023-08-29 22:03:37,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:03:37,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:03:37,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1078 transitions. [2023-08-29 22:03:37,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47699115044247786 [2023-08-29 22:03:37,748 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1078 transitions. [2023-08-29 22:03:37,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1078 transitions. [2023-08-29 22:03:37,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:37,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1078 transitions. [2023-08-29 22:03:37,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 215.6) internal successors, (1078), 5 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:37,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 452.0) internal successors, (2712), 6 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:37,753 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 452.0) internal successors, (2712), 6 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:37,753 INFO L175 Difference]: Start difference. First operand has 31 places, 16 transitions, 61 flow. Second operand 5 states and 1078 transitions. [2023-08-29 22:03:37,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 20 transitions, 111 flow [2023-08-29 22:03:37,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 20 transitions, 102 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 22:03:37,753 INFO L231 Difference]: Finished difference. Result has 30 places, 14 transitions, 56 flow [2023-08-29 22:03:37,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=56, PETRI_PLACES=30, PETRI_TRANSITIONS=14} [2023-08-29 22:03:37,754 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -61 predicate places. [2023-08-29 22:03:37,754 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 14 transitions, 56 flow [2023-08-29 22:03:37,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 213.66666666666666) internal successors, (1282), 6 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:37,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:37,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:37,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 22:03:37,755 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-29 22:03:37,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:37,755 INFO L85 PathProgramCache]: Analyzing trace with hash -541394976, now seen corresponding path program 1 times [2023-08-29 22:03:37,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:37,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286602068] [2023-08-29 22:03:37,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:37,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:37,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:37,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286602068] [2023-08-29 22:03:37,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286602068] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:37,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:37,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:03:37,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148372261] [2023-08-29 22:03:37,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:37,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:03:37,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:37,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:03:37,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:03:38,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 452 [2023-08-29 22:03:38,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 14 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 222.8) internal successors, (1114), 5 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:38,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:38,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 452 [2023-08-29 22:03:38,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:38,053 INFO L130 PetriNetUnfolder]: 10/34 cut-off events. [2023-08-29 22:03:38,053 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 22:03:38,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 34 events. 10/34 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 51 event pairs, 0 based on Foata normal form. 3/37 useless extension candidates. Maximal degree in co-relation 101. Up to 15 conditions per place. [2023-08-29 22:03:38,053 INFO L137 encePairwiseOnDemand]: 448/452 looper letters, 0 selfloop transitions, 0 changer transitions 18/18 dead transitions. [2023-08-29 22:03:38,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 18 transitions, 102 flow [2023-08-29 22:03:38,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:03:38,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:03:38,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1121 transitions. [2023-08-29 22:03:38,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49601769911504423 [2023-08-29 22:03:38,056 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1121 transitions. [2023-08-29 22:03:38,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1121 transitions. [2023-08-29 22:03:38,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:38,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1121 transitions. [2023-08-29 22:03:38,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 224.2) internal successors, (1121), 5 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:38,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 452.0) internal successors, (2712), 6 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:38,060 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 452.0) internal successors, (2712), 6 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:38,060 INFO L175 Difference]: Start difference. First operand has 30 places, 14 transitions, 56 flow. Second operand 5 states and 1121 transitions. [2023-08-29 22:03:38,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 18 transitions, 102 flow [2023-08-29 22:03:38,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 18 transitions, 95 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:03:38,061 INFO L231 Difference]: Finished difference. Result has 29 places, 0 transitions, 0 flow [2023-08-29 22:03:38,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=29, PETRI_TRANSITIONS=0} [2023-08-29 22:03:38,061 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -62 predicate places. [2023-08-29 22:03:38,061 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 0 transitions, 0 flow [2023-08-29 22:03:38,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 222.8) internal successors, (1114), 5 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:38,063 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 63 remaining) [2023-08-29 22:03:38,063 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 63 remaining) [2023-08-29 22:03:38,063 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 63 remaining) [2023-08-29 22:03:38,063 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 63 remaining) [2023-08-29 22:03:38,063 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 63 remaining) [2023-08-29 22:03:38,063 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 63 remaining) [2023-08-29 22:03:38,063 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 63 remaining) [2023-08-29 22:03:38,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 63 remaining) [2023-08-29 22:03:38,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 63 remaining) [2023-08-29 22:03:38,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 63 remaining) [2023-08-29 22:03:38,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 63 remaining) [2023-08-29 22:03:38,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 63 remaining) [2023-08-29 22:03:38,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 63 remaining) [2023-08-29 22:03:38,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 63 remaining) [2023-08-29 22:03:38,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 63 remaining) [2023-08-29 22:03:38,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 63 remaining) [2023-08-29 22:03:38,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 63 remaining) [2023-08-29 22:03:38,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 63 remaining) [2023-08-29 22:03:38,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 63 remaining) [2023-08-29 22:03:38,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 63 remaining) [2023-08-29 22:03:38,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 63 remaining) [2023-08-29 22:03:38,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 63 remaining) [2023-08-29 22:03:38,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 63 remaining) [2023-08-29 22:03:38,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 63 remaining) [2023-08-29 22:03:38,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 63 remaining) [2023-08-29 22:03:38,065 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 63 remaining) [2023-08-29 22:03:38,065 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 63 remaining) [2023-08-29 22:03:38,065 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr14ASSERT_VIOLATIONMEMORY_LEAK (35 of 63 remaining) [2023-08-29 22:03:38,065 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 63 remaining) [2023-08-29 22:03:38,065 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 63 remaining) [2023-08-29 22:03:38,065 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 63 remaining) [2023-08-29 22:03:38,066 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 63 remaining) [2023-08-29 22:03:38,066 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 63 remaining) [2023-08-29 22:03:38,066 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 63 remaining) [2023-08-29 22:03:38,066 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 63 remaining) [2023-08-29 22:03:38,066 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 63 remaining) [2023-08-29 22:03:38,066 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 63 remaining) [2023-08-29 22:03:38,066 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 63 remaining) [2023-08-29 22:03:38,066 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 63 remaining) [2023-08-29 22:03:38,066 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 63 remaining) [2023-08-29 22:03:38,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 63 remaining) [2023-08-29 22:03:38,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 63 remaining) [2023-08-29 22:03:38,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 63 remaining) [2023-08-29 22:03:38,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 63 remaining) [2023-08-29 22:03:38,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 63 remaining) [2023-08-29 22:03:38,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 63 remaining) [2023-08-29 22:03:38,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 63 remaining) [2023-08-29 22:03:38,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 63 remaining) [2023-08-29 22:03:38,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 63 remaining) [2023-08-29 22:03:38,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 63 remaining) [2023-08-29 22:03:38,068 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr14ASSERT_VIOLATIONMEMORY_LEAK (12 of 63 remaining) [2023-08-29 22:03:38,068 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 63 remaining) [2023-08-29 22:03:38,068 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 63 remaining) [2023-08-29 22:03:38,068 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 63 remaining) [2023-08-29 22:03:38,068 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 63 remaining) [2023-08-29 22:03:38,068 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 63 remaining) [2023-08-29 22:03:38,068 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 63 remaining) [2023-08-29 22:03:38,068 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (5 of 63 remaining) [2023-08-29 22:03:38,068 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 63 remaining) [2023-08-29 22:03:38,069 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 63 remaining) [2023-08-29 22:03:38,069 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 63 remaining) [2023-08-29 22:03:38,069 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 63 remaining) [2023-08-29 22:03:38,069 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 63 remaining) [2023-08-29 22:03:38,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 22:03:38,069 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:38,070 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 22:03:38,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 249 transitions, 520 flow [2023-08-29 22:03:38,097 INFO L130 PetriNetUnfolder]: 52/481 cut-off events. [2023-08-29 22:03:38,097 INFO L131 PetriNetUnfolder]: For 8/15 co-relation queries the response was YES. [2023-08-29 22:03:38,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 481 events. 52/481 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2230 event pairs, 0 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 244. Up to 8 conditions per place. [2023-08-29 22:03:38,098 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 249 transitions, 520 flow [2023-08-29 22:03:38,099 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 225 places, 241 transitions, 498 flow [2023-08-29 22:03:38,099 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:03:38,099 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 225 places, 241 transitions, 498 flow [2023-08-29 22:03:38,100 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 225 places, 241 transitions, 498 flow [2023-08-29 22:03:38,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 241 transitions, 498 flow [2023-08-29 22:03:38,121 INFO L130 PetriNetUnfolder]: 48/461 cut-off events. [2023-08-29 22:03:38,121 INFO L131 PetriNetUnfolder]: For 4/7 co-relation queries the response was YES. [2023-08-29 22:03:38,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 461 events. 48/461 cut-off events. For 4/7 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2121 event pairs, 0 based on Foata normal form. 0/334 useless extension candidates. Maximal degree in co-relation 226. Up to 8 conditions per place. [2023-08-29 22:03:38,130 INFO L119 LiptonReduction]: Number of co-enabled transitions 19536 [2023-08-29 22:03:42,849 INFO L134 LiptonReduction]: Checked pairs total: 55478 [2023-08-29 22:03:42,850 INFO L136 LiptonReduction]: Total number of compositions: 185 [2023-08-29 22:03:42,851 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 22:03:42,851 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;@123c00ac, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:03:42,851 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-29 22:03:42,854 INFO L130 PetriNetUnfolder]: 0/29 cut-off events. [2023-08-29 22:03:42,855 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:03:42,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:42,855 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-29 22:03:42,855 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 22:03:42,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:42,855 INFO L85 PathProgramCache]: Analyzing trace with hash -515027855, now seen corresponding path program 1 times [2023-08-29 22:03:42,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:42,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611553912] [2023-08-29 22:03:42,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:42,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 22:03:42,879 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 22:03:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 22:03:42,896 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 22:03:42,896 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 22:03:42,896 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-29 22:03:42,897 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-29 22:03:42,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 22:03:42,897 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 22:03:42,897 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-29 22:03:42,898 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 22:03:42,898 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 22:03:42,933 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-29 22:03:42,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 354 places, 387 transitions, 822 flow [2023-08-29 22:03:43,071 INFO L130 PetriNetUnfolder]: 191/1424 cut-off events. [2023-08-29 22:03:43,071 INFO L131 PetriNetUnfolder]: For 72/95 co-relation queries the response was YES. [2023-08-29 22:03:43,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1521 conditions, 1424 events. 191/1424 cut-off events. For 72/95 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 9711 event pairs, 2 based on Foata normal form. 0/1025 useless extension candidates. Maximal degree in co-relation 888. Up to 32 conditions per place. [2023-08-29 22:03:43,084 INFO L82 GeneralOperation]: Start removeDead. Operand has 354 places, 387 transitions, 822 flow [2023-08-29 22:03:43,094 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 354 places, 387 transitions, 822 flow [2023-08-29 22:03:43,094 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:03:43,094 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 354 places, 387 transitions, 822 flow [2023-08-29 22:03:43,095 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 354 places, 387 transitions, 822 flow [2023-08-29 22:03:43,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 354 places, 387 transitions, 822 flow [2023-08-29 22:03:43,217 INFO L130 PetriNetUnfolder]: 191/1424 cut-off events. [2023-08-29 22:03:43,218 INFO L131 PetriNetUnfolder]: For 72/95 co-relation queries the response was YES. [2023-08-29 22:03:43,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1521 conditions, 1424 events. 191/1424 cut-off events. For 72/95 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 9711 event pairs, 2 based on Foata normal form. 0/1025 useless extension candidates. Maximal degree in co-relation 888. Up to 32 conditions per place. [2023-08-29 22:03:43,297 INFO L119 LiptonReduction]: Number of co-enabled transitions 78012 [2023-08-29 22:03:50,223 INFO L134 LiptonReduction]: Checked pairs total: 253813 [2023-08-29 22:03:50,223 INFO L136 LiptonReduction]: Total number of compositions: 322 [2023-08-29 22:03:50,225 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:03:50,225 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;@123c00ac, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:03:50,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 88 error locations. [2023-08-29 22:03:50,226 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 22:03:50,226 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:03:50,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:50,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 22:03:50,226 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2023-08-29 22:03:50,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:50,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1989, now seen corresponding path program 1 times [2023-08-29 22:03:50,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:50,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262354486] [2023-08-29 22:03:50,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:50,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:50,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:50,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:50,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262354486] [2023-08-29 22:03:50,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262354486] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:50,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:50,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 22:03:50,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174746926] [2023-08-29 22:03:50,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:50,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 22:03:50,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:50,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 22:03:50,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 22:03:50,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 345 out of 709 [2023-08-29 22:03:50,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 175 transitions, 398 flow. Second operand has 2 states, 2 states have (on average 345.5) internal successors, (691), 2 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:50,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:50,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 345 of 709 [2023-08-29 22:03:50,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand