./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/queue_longer.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread/queue_longer.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 22:07:34,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 22:07:34,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 22:07:34,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 22:07:34,920 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 22:07:34,920 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 22:07:34,922 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 22:07:34,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 22:07:34,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 22:07:34,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 22:07:34,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 22:07:34,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 22:07:34,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 22:07:34,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 22:07:34,933 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 22:07:34,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 22:07:34,938 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 22:07:34,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 22:07:34,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 22:07:34,944 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 22:07:34,948 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 22:07:34,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 22:07:34,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 22:07:34,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 22:07:34,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 22:07:34,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 22:07:34,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 22:07:34,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 22:07:34,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 22:07:34,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 22:07:34,966 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 22:07:34,967 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 22:07:34,967 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 22:07:34,969 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 22:07:34,970 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 22:07:34,973 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 22:07:34,974 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 22:07:34,974 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 22:07:34,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 22:07:34,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 22:07:34,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 22:07:34,977 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-31 22:07:35,000 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 22:07:35,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 22:07:35,001 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 22:07:35,002 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 22:07:35,003 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 22:07:35,003 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 22:07:35,004 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 22:07:35,004 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 22:07:35,004 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 22:07:35,004 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 22:07:35,005 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 22:07:35,005 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 22:07:35,005 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 22:07:35,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 22:07:35,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 22:07:35,006 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-31 22:07:35,006 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-31 22:07:35,006 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-31 22:07:35,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 22:07:35,007 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-31 22:07:35,007 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 22:07:35,007 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 22:07:35,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 22:07:35,007 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 22:07:35,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 22:07:35,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:07:35,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 22:07:35,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 22:07:35,008 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 22:07:35,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 22:07:35,009 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 22:07:35,009 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 22:07:35,009 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 22:07:35,009 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 22:07:35,010 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 22:07:35,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 22:07:35,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 22:07:35,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 22:07:35,327 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 22:07:35,327 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 22:07:35,328 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue_longer.i [2023-08-31 22:07:36,465 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 22:07:36,784 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 22:07:36,785 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_longer.i [2023-08-31 22:07:36,811 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/507ed3409/569029463b6d4a79a50533b840e6b8bf/FLAG461b9afad [2023-08-31 22:07:36,822 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/507ed3409/569029463b6d4a79a50533b840e6b8bf [2023-08-31 22:07:36,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 22:07:36,825 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 22:07:36,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 22:07:36,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 22:07:36,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 22:07:36,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:07:36" (1/1) ... [2023-08-31 22:07:36,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36a08a12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:36, skipping insertion in model container [2023-08-31 22:07:36,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:07:36" (1/1) ... [2023-08-31 22:07:36,839 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 22:07:36,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 22:07:37,308 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_longer.i[43296,43309] [2023-08-31 22:07:37,315 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_longer.i[43503,43516] [2023-08-31 22:07:37,320 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_longer.i[43783,43796] [2023-08-31 22:07:37,327 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:07:37,342 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 22:07:37,404 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_longer.i[43296,43309] [2023-08-31 22:07:37,407 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_longer.i[43503,43516] [2023-08-31 22:07:37,415 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_longer.i[43783,43796] [2023-08-31 22:07:37,422 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:07:37,486 INFO L208 MainTranslator]: Completed translation [2023-08-31 22:07:37,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37 WrapperNode [2023-08-31 22:07:37,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 22:07:37,488 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 22:07:37,488 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 22:07:37,488 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 22:07:37,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37" (1/1) ... [2023-08-31 22:07:37,526 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37" (1/1) ... [2023-08-31 22:07:37,564 INFO L138 Inliner]: procedures = 274, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 243 [2023-08-31 22:07:37,564 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 22:07:37,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 22:07:37,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 22:07:37,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 22:07:37,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37" (1/1) ... [2023-08-31 22:07:37,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37" (1/1) ... [2023-08-31 22:07:37,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37" (1/1) ... [2023-08-31 22:07:37,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37" (1/1) ... [2023-08-31 22:07:37,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37" (1/1) ... [2023-08-31 22:07:37,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37" (1/1) ... [2023-08-31 22:07:37,626 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37" (1/1) ... [2023-08-31 22:07:37,631 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37" (1/1) ... [2023-08-31 22:07:37,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 22:07:37,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 22:07:37,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 22:07:37,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 22:07:37,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37" (1/1) ... [2023-08-31 22:07:37,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:07:37,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:07:37,675 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 22:07:37,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 22:07:37,702 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-31 22:07:37,702 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-31 22:07:37,703 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-31 22:07:37,703 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-31 22:07:37,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 22:07:37,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 22:07:37,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 22:07:37,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 22:07:37,707 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 22:07:37,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 22:07:37,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 22:07:37,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 22:07:37,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 22:07:37,709 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 22:07:37,890 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 22:07:37,892 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 22:07:38,506 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 22:07:38,520 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 22:07:38,520 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 22:07:38,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:07:38 BoogieIcfgContainer [2023-08-31 22:07:38,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 22:07:38,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 22:07:38,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 22:07:38,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 22:07:38,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 10:07:36" (1/3) ... [2023-08-31 22:07:38,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f95bef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:07:38, skipping insertion in model container [2023-08-31 22:07:38,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37" (2/3) ... [2023-08-31 22:07:38,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f95bef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:07:38, skipping insertion in model container [2023-08-31 22:07:38,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:07:38" (3/3) ... [2023-08-31 22:07:38,531 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longer.i [2023-08-31 22:07:38,546 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 22:07:38,546 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2023-08-31 22:07:38,546 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 22:07:38,684 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 22:07:38,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 330 places, 338 transitions, 692 flow [2023-08-31 22:07:38,854 INFO L130 PetriNetUnfolder]: 15/336 cut-off events. [2023-08-31 22:07:38,855 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:07:38,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 336 events. 15/336 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 755 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 245. Up to 2 conditions per place. [2023-08-31 22:07:38,867 INFO L82 GeneralOperation]: Start removeDead. Operand has 330 places, 338 transitions, 692 flow [2023-08-31 22:07:38,880 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 324 places, 332 transitions, 676 flow [2023-08-31 22:07:38,884 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:07:38,898 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 324 places, 332 transitions, 676 flow [2023-08-31 22:07:38,901 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 324 places, 332 transitions, 676 flow [2023-08-31 22:07:38,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 324 places, 332 transitions, 676 flow [2023-08-31 22:07:38,963 INFO L130 PetriNetUnfolder]: 15/332 cut-off events. [2023-08-31 22:07:38,963 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:07:38,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 332 events. 15/332 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 741 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 245. Up to 2 conditions per place. [2023-08-31 22:07:38,987 INFO L119 LiptonReduction]: Number of co-enabled transitions 28780 [2023-08-31 22:07:51,896 INFO L134 LiptonReduction]: Checked pairs total: 105796 [2023-08-31 22:07:51,896 INFO L136 LiptonReduction]: Total number of compositions: 415 [2023-08-31 22:07:51,909 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 22:07:51,915 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;@3e599508, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:07:51,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 142 error locations. [2023-08-31 22:07:51,917 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-31 22:07:51,917 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:07:51,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:07:51,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-31 22:07:51,918 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:07:51,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:07:51,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1407, now seen corresponding path program 1 times [2023-08-31 22:07:51,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:07:51,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408016385] [2023-08-31 22:07:51,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:07:51,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:07:52,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:07:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:07:52,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:07:52,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408016385] [2023-08-31 22:07:52,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408016385] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:07:52,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:07:52,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-31 22:07:52,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528096470] [2023-08-31 22:07:52,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:07:52,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-31 22:07:52,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:07:52,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-31 22:07:52,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-31 22:07:52,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 753 [2023-08-31 22:07:52,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 142 transitions, 296 flow. Second operand has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:52,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:07:52,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 753 [2023-08-31 22:07:52,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:07:53,250 INFO L130 PetriNetUnfolder]: 7123/11650 cut-off events. [2023-08-31 22:07:53,252 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-08-31 22:07:53,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22548 conditions, 11650 events. 7123/11650 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 70134 event pairs, 6167 based on Foata normal form. 88/6498 useless extension candidates. Maximal degree in co-relation 22160. Up to 10787 conditions per place. [2023-08-31 22:07:53,325 INFO L137 encePairwiseOnDemand]: 704/753 looper letters, 82 selfloop transitions, 0 changer transitions 0/93 dead transitions. [2023-08-31 22:07:53,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 93 transitions, 362 flow [2023-08-31 22:07:53,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-31 22:07:53,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-31 22:07:53,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 781 transitions. [2023-08-31 22:07:53,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185922974767596 [2023-08-31 22:07:53,341 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 781 transitions. [2023-08-31 22:07:53,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 781 transitions. [2023-08-31 22:07:53,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:07:53,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 781 transitions. [2023-08-31 22:07:53,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 390.5) internal successors, (781), 2 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:53,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 753.0) internal successors, (2259), 3 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:53,366 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 753.0) internal successors, (2259), 3 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:53,368 INFO L175 Difference]: Start difference. First operand has 139 places, 142 transitions, 296 flow. Second operand 2 states and 781 transitions. [2023-08-31 22:07:53,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 93 transitions, 362 flow [2023-08-31 22:07:53,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 354 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 22:07:53,379 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 190 flow [2023-08-31 22:07:53,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=190, PETRI_PLACES=89, PETRI_TRANSITIONS=93} [2023-08-31 22:07:53,385 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -50 predicate places. [2023-08-31 22:07:53,386 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 190 flow [2023-08-31 22:07:53,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:53,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:07:53,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:07:53,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 22:07:53,388 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:07:53,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:07:53,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1397048, now seen corresponding path program 1 times [2023-08-31 22:07:53,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:07:53,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626063628] [2023-08-31 22:07:53,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:07:53,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:07:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:07:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:07:53,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:07:53,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626063628] [2023-08-31 22:07:53,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626063628] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:07:53,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:07:53,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:07:53,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769798836] [2023-08-31 22:07:53,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:07:53,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:07:53,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:07:53,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:07:53,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:07:53,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 753 [2023-08-31 22:07:53,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 93 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:53,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:07:53,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 753 [2023-08-31 22:07:53,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:07:54,770 INFO L130 PetriNetUnfolder]: 6353/10400 cut-off events. [2023-08-31 22:07:54,771 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 22:07:54,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20043 conditions, 10400 events. 6353/10400 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 61482 event pairs, 5453 based on Foata normal form. 0/5972 useless extension candidates. Maximal degree in co-relation 20040. Up to 9599 conditions per place. [2023-08-31 22:07:54,822 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 76 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-08-31 22:07:54,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 89 transitions, 338 flow [2023-08-31 22:07:54,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:07:54,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:07:54,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1048 transitions. [2023-08-31 22:07:54,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639220894200974 [2023-08-31 22:07:54,826 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1048 transitions. [2023-08-31 22:07:54,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1048 transitions. [2023-08-31 22:07:54,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:07:54,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1048 transitions. [2023-08-31 22:07:54,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 349.3333333333333) internal successors, (1048), 3 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:54,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:54,836 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:54,836 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 190 flow. Second operand 3 states and 1048 transitions. [2023-08-31 22:07:54,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 89 transitions, 338 flow [2023-08-31 22:07:54,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 89 transitions, 338 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 22:07:54,839 INFO L231 Difference]: Finished difference. Result has 87 places, 89 transitions, 186 flow [2023-08-31 22:07:54,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=87, PETRI_TRANSITIONS=89} [2023-08-31 22:07:54,840 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -52 predicate places. [2023-08-31 22:07:54,840 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 89 transitions, 186 flow [2023-08-31 22:07:54,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:54,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:07:54,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:07:54,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 22:07:54,841 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:07:54,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:07:54,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1397046, now seen corresponding path program 1 times [2023-08-31 22:07:54,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:07:54,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947120259] [2023-08-31 22:07:54,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:07:54,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:07:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:07:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:07:55,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:07:55,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947120259] [2023-08-31 22:07:55,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947120259] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:07:55,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:07:55,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:07:55,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471867144] [2023-08-31 22:07:55,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:07:55,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:07:55,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:07:55,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:07:55,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:07:55,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 753 [2023-08-31 22:07:55,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 89 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:55,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:07:55,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 753 [2023-08-31 22:07:55,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:07:55,962 INFO L130 PetriNetUnfolder]: 5480/8975 cut-off events. [2023-08-31 22:07:55,963 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 22:07:55,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17272 conditions, 8975 events. 5480/8975 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 51571 event pairs, 4648 based on Foata normal form. 0/5447 useless extension candidates. Maximal degree in co-relation 17268. Up to 8255 conditions per place. [2023-08-31 22:07:56,019 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 72 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-08-31 22:07:56,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 84 transitions, 322 flow [2023-08-31 22:07:56,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:07:56,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:07:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1047 transitions. [2023-08-31 22:07:56,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634794156706507 [2023-08-31 22:07:56,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1047 transitions. [2023-08-31 22:07:56,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1047 transitions. [2023-08-31 22:07:56,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:07:56,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1047 transitions. [2023-08-31 22:07:56,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 349.0) internal successors, (1047), 3 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:56,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:56,033 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:56,034 INFO L175 Difference]: Start difference. First operand has 87 places, 89 transitions, 186 flow. Second operand 3 states and 1047 transitions. [2023-08-31 22:07:56,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 84 transitions, 322 flow [2023-08-31 22:07:56,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 84 transitions, 318 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:07:56,038 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 174 flow [2023-08-31 22:07:56,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=82, PETRI_TRANSITIONS=84} [2023-08-31 22:07:56,039 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -57 predicate places. [2023-08-31 22:07:56,040 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 174 flow [2023-08-31 22:07:56,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:56,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:07:56,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:07:56,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 22:07:56,041 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:07:56,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:07:56,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1396972, now seen corresponding path program 1 times [2023-08-31 22:07:56,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:07:56,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345726507] [2023-08-31 22:07:56,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:07:56,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:07:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:07:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:07:56,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:07:56,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345726507] [2023-08-31 22:07:56,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345726507] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:07:56,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:07:56,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:07:56,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846228823] [2023-08-31 22:07:56,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:07:56,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:07:56,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:07:56,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:07:56,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:07:56,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 753 [2023-08-31 22:07:56,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 84 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:56,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:07:56,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 753 [2023-08-31 22:07:56,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:07:56,919 INFO L130 PetriNetUnfolder]: 5420/8856 cut-off events. [2023-08-31 22:07:56,920 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 22:07:56,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17039 conditions, 8856 events. 5420/8856 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 50619 event pairs, 4596 based on Foata normal form. 0/5402 useless extension candidates. Maximal degree in co-relation 17035. Up to 8141 conditions per place. [2023-08-31 22:07:56,954 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 69 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-31 22:07:56,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 312 flow [2023-08-31 22:07:56,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:07:56,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:07:56,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1021 transitions. [2023-08-31 22:07:56,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45196989818503763 [2023-08-31 22:07:56,958 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1021 transitions. [2023-08-31 22:07:56,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1021 transitions. [2023-08-31 22:07:56,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:07:56,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1021 transitions. [2023-08-31 22:07:56,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 340.3333333333333) internal successors, (1021), 3 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:56,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:56,967 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:56,967 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 174 flow. Second operand 3 states and 1021 transitions. [2023-08-31 22:07:56,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 312 flow [2023-08-31 22:07:56,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 82 transitions, 311 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:07:56,969 INFO L231 Difference]: Finished difference. Result has 81 places, 82 transitions, 173 flow [2023-08-31 22:07:56,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=81, PETRI_TRANSITIONS=82} [2023-08-31 22:07:56,970 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -58 predicate places. [2023-08-31 22:07:56,970 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 82 transitions, 173 flow [2023-08-31 22:07:56,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:56,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:07:56,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:07:56,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 22:07:56,972 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:07:56,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:07:56,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1396973, now seen corresponding path program 1 times [2023-08-31 22:07:56,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:07:56,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34359581] [2023-08-31 22:07:56,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:07:56,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:07:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:07:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:07:57,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:07:57,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34359581] [2023-08-31 22:07:57,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34359581] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:07:57,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:07:57,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:07:57,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411339803] [2023-08-31 22:07:57,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:07:57,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:07:57,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:07:57,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:07:57,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:07:57,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-31 22:07:57,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 321.0) internal successors, (963), 3 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:57,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:07:57,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-31 22:07:57,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:07:57,801 INFO L130 PetriNetUnfolder]: 5360/8737 cut-off events. [2023-08-31 22:07:57,802 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 22:07:57,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16809 conditions, 8737 events. 5360/8737 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 49680 event pairs, 4544 based on Foata normal form. 0/5357 useless extension candidates. Maximal degree in co-relation 16805. Up to 8028 conditions per place. [2023-08-31 22:07:57,848 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 67 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-31 22:07:57,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 80 transitions, 307 flow [2023-08-31 22:07:57,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:07:57,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:07:57,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1031 transitions. [2023-08-31 22:07:57,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563966356795042 [2023-08-31 22:07:57,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1031 transitions. [2023-08-31 22:07:57,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1031 transitions. [2023-08-31 22:07:57,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:07:57,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1031 transitions. [2023-08-31 22:07:57,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 343.6666666666667) internal successors, (1031), 3 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:57,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:57,861 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:57,861 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 173 flow. Second operand 3 states and 1031 transitions. [2023-08-31 22:07:57,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 80 transitions, 307 flow [2023-08-31 22:07:57,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 80 transitions, 303 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:07:57,865 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 169 flow [2023-08-31 22:07:57,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2023-08-31 22:07:57,868 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -60 predicate places. [2023-08-31 22:07:57,868 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 169 flow [2023-08-31 22:07:57,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 321.0) internal successors, (963), 3 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:57,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:07:57,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 22:07:57,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 22:07:57,869 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:07:57,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:07:57,870 INFO L85 PathProgramCache]: Analyzing trace with hash 43308809, now seen corresponding path program 1 times [2023-08-31 22:07:57,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:07:57,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870345869] [2023-08-31 22:07:57,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:07:57,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:07:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:07:58,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:07:58,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:07:58,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870345869] [2023-08-31 22:07:58,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870345869] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:07:58,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:07:58,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:07:58,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118872916] [2023-08-31 22:07:58,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:07:58,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:07:58,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:07:58,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:07:58,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:07:58,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 753 [2023-08-31 22:07:58,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:58,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:07:58,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 753 [2023-08-31 22:07:58,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:07:59,234 INFO L130 PetriNetUnfolder]: 5645/9113 cut-off events. [2023-08-31 22:07:59,234 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 22:07:59,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17623 conditions, 9113 events. 5645/9113 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 51051 event pairs, 4618 based on Foata normal form. 0/5451 useless extension candidates. Maximal degree in co-relation 17619. Up to 8462 conditions per place. [2023-08-31 22:07:59,293 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 71 selfloop transitions, 6 changer transitions 0/86 dead transitions. [2023-08-31 22:07:59,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 86 transitions, 335 flow [2023-08-31 22:07:59,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:07:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:07:59,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1306 transitions. [2023-08-31 22:07:59,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43359893758300133 [2023-08-31 22:07:59,298 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1306 transitions. [2023-08-31 22:07:59,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1306 transitions. [2023-08-31 22:07:59,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:07:59,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1306 transitions. [2023-08-31 22:07:59,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 326.5) internal successors, (1306), 4 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:59,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:59,308 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:59,308 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 169 flow. Second operand 4 states and 1306 transitions. [2023-08-31 22:07:59,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 86 transitions, 335 flow [2023-08-31 22:07:59,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 86 transitions, 331 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:07:59,311 INFO L231 Difference]: Finished difference. Result has 82 places, 85 transitions, 204 flow [2023-08-31 22:07:59,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=204, PETRI_PLACES=82, PETRI_TRANSITIONS=85} [2023-08-31 22:07:59,313 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -57 predicate places. [2023-08-31 22:07:59,314 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 85 transitions, 204 flow [2023-08-31 22:07:59,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:59,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:07:59,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 22:07:59,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 22:07:59,316 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:07:59,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:07:59,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1342574226, now seen corresponding path program 1 times [2023-08-31 22:07:59,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:07:59,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53751031] [2023-08-31 22:07:59,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:07:59,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:07:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:07:59,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:07:59,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:07:59,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53751031] [2023-08-31 22:07:59,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53751031] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:07:59,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:07:59,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:07:59,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488423369] [2023-08-31 22:07:59,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:07:59,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:07:59,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:07:59,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:07:59,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:07:59,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 753 [2023-08-31 22:07:59,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 85 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 303.0) internal successors, (1515), 5 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:07:59,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:07:59,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 753 [2023-08-31 22:07:59,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:00,585 INFO L130 PetriNetUnfolder]: 4666/7530 cut-off events. [2023-08-31 22:08:00,585 INFO L131 PetriNetUnfolder]: For 106/106 co-relation queries the response was YES. [2023-08-31 22:08:00,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14881 conditions, 7530 events. 4666/7530 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 41926 event pairs, 54 based on Foata normal form. 156/4886 useless extension candidates. Maximal degree in co-relation 14875. Up to 6684 conditions per place. [2023-08-31 22:08:00,629 INFO L137 encePairwiseOnDemand]: 745/753 looper letters, 112 selfloop transitions, 5 changer transitions 0/129 dead transitions. [2023-08-31 22:08:00,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 129 transitions, 526 flow [2023-08-31 22:08:00,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 22:08:00,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 22:08:00,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1629 transitions. [2023-08-31 22:08:00,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43266932270916336 [2023-08-31 22:08:00,634 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1629 transitions. [2023-08-31 22:08:00,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1629 transitions. [2023-08-31 22:08:00,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:00,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1629 transitions. [2023-08-31 22:08:00,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 325.8) internal successors, (1629), 5 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:00,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 753.0) internal successors, (4518), 6 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:00,646 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 753.0) internal successors, (4518), 6 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:00,646 INFO L175 Difference]: Start difference. First operand has 82 places, 85 transitions, 204 flow. Second operand 5 states and 1629 transitions. [2023-08-31 22:08:00,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 129 transitions, 526 flow [2023-08-31 22:08:00,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 129 transitions, 526 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 22:08:00,651 INFO L231 Difference]: Finished difference. Result has 82 places, 80 transitions, 199 flow [2023-08-31 22:08:00,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=82, PETRI_TRANSITIONS=80} [2023-08-31 22:08:00,652 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -57 predicate places. [2023-08-31 22:08:00,652 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 80 transitions, 199 flow [2023-08-31 22:08:00,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 303.0) internal successors, (1515), 5 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:00,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:00,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 22:08:00,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 22:08:00,653 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:00,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:00,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1342534681, now seen corresponding path program 1 times [2023-08-31 22:08:00,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:00,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774464507] [2023-08-31 22:08:00,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:00,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:00,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:01,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:01,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:01,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774464507] [2023-08-31 22:08:01,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774464507] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:01,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:01,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:08:01,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743022080] [2023-08-31 22:08:01,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:01,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:08:01,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:01,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:08:01,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:08:01,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 753 [2023-08-31 22:08:01,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 80 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:01,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:01,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 753 [2023-08-31 22:08:01,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:02,180 INFO L130 PetriNetUnfolder]: 5287/8530 cut-off events. [2023-08-31 22:08:02,180 INFO L131 PetriNetUnfolder]: For 742/742 co-relation queries the response was YES. [2023-08-31 22:08:02,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17148 conditions, 8530 events. 5287/8530 cut-off events. For 742/742 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 48081 event pairs, 1010 based on Foata normal form. 45/5468 useless extension candidates. Maximal degree in co-relation 17141. Up to 7592 conditions per place. [2023-08-31 22:08:02,222 INFO L137 encePairwiseOnDemand]: 748/753 looper letters, 99 selfloop transitions, 7 changer transitions 0/115 dead transitions. [2023-08-31 22:08:02,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 115 transitions, 491 flow [2023-08-31 22:08:02,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:08:02,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:08:02,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1317 transitions. [2023-08-31 22:08:02,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43725099601593626 [2023-08-31 22:08:02,227 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1317 transitions. [2023-08-31 22:08:02,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1317 transitions. [2023-08-31 22:08:02,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:02,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1317 transitions. [2023-08-31 22:08:02,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 329.25) internal successors, (1317), 4 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:02,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:02,235 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:02,235 INFO L175 Difference]: Start difference. First operand has 82 places, 80 transitions, 199 flow. Second operand 4 states and 1317 transitions. [2023-08-31 22:08:02,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 115 transitions, 491 flow [2023-08-31 22:08:02,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 115 transitions, 480 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 22:08:02,240 INFO L231 Difference]: Finished difference. Result has 84 places, 84 transitions, 234 flow [2023-08-31 22:08:02,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=234, PETRI_PLACES=84, PETRI_TRANSITIONS=84} [2023-08-31 22:08:02,242 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -55 predicate places. [2023-08-31 22:08:02,242 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 84 transitions, 234 flow [2023-08-31 22:08:02,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:02,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:02,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 22:08:02,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 22:08:02,243 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:02,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:02,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1342523318, now seen corresponding path program 1 times [2023-08-31 22:08:02,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:02,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806401983] [2023-08-31 22:08:02,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:02,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:02,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:02,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:02,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806401983] [2023-08-31 22:08:02,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806401983] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:02,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:02,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:08:02,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141970903] [2023-08-31 22:08:02,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:02,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:08:02,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:02,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:08:02,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:08:02,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 753 [2023-08-31 22:08:02,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 84 transitions, 234 flow. Second operand has 4 states, 4 states have (on average 319.25) internal successors, (1277), 4 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:02,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:02,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 753 [2023-08-31 22:08:02,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:02,912 INFO L130 PetriNetUnfolder]: 3673/6134 cut-off events. [2023-08-31 22:08:02,912 INFO L131 PetriNetUnfolder]: For 620/620 co-relation queries the response was YES. [2023-08-31 22:08:02,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12413 conditions, 6134 events. 3673/6134 cut-off events. For 620/620 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 33875 event pairs, 2958 based on Foata normal form. 0/4268 useless extension candidates. Maximal degree in co-relation 12404. Up to 5601 conditions per place. [2023-08-31 22:08:02,941 INFO L137 encePairwiseOnDemand]: 750/753 looper letters, 68 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-31 22:08:02,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 83 transitions, 372 flow [2023-08-31 22:08:02,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:08:02,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:08:02,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1019 transitions. [2023-08-31 22:08:02,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45108455068614434 [2023-08-31 22:08:02,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1019 transitions. [2023-08-31 22:08:02,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1019 transitions. [2023-08-31 22:08:02,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:02,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1019 transitions. [2023-08-31 22:08:02,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 339.6666666666667) internal successors, (1019), 3 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:02,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:02,952 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:02,953 INFO L175 Difference]: Start difference. First operand has 84 places, 84 transitions, 234 flow. Second operand 3 states and 1019 transitions. [2023-08-31 22:08:02,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 83 transitions, 372 flow [2023-08-31 22:08:02,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 83 transitions, 366 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-31 22:08:02,956 INFO L231 Difference]: Finished difference. Result has 85 places, 83 transitions, 230 flow [2023-08-31 22:08:02,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=85, PETRI_TRANSITIONS=83} [2023-08-31 22:08:02,957 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -54 predicate places. [2023-08-31 22:08:02,957 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 83 transitions, 230 flow [2023-08-31 22:08:02,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 319.25) internal successors, (1277), 4 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:02,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:02,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 22:08:02,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 22:08:02,958 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:02,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:02,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1342523317, now seen corresponding path program 1 times [2023-08-31 22:08:02,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:02,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592192956] [2023-08-31 22:08:02,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:02,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:03,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:03,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592192956] [2023-08-31 22:08:03,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592192956] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:03,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:03,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:08:03,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232179832] [2023-08-31 22:08:03,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:03,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:08:03,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:03,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:08:03,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:08:03,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 753 [2023-08-31 22:08:03,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 83 transitions, 230 flow. Second operand has 4 states, 4 states have (on average 313.25) internal successors, (1253), 4 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:03,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:03,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 753 [2023-08-31 22:08:03,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:03,468 INFO L130 PetriNetUnfolder]: 2274/3952 cut-off events. [2023-08-31 22:08:03,468 INFO L131 PetriNetUnfolder]: For 286/286 co-relation queries the response was YES. [2023-08-31 22:08:03,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7958 conditions, 3952 events. 2274/3952 cut-off events. For 286/286 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 21066 event pairs, 1782 based on Foata normal form. 0/3121 useless extension candidates. Maximal degree in co-relation 7948. Up to 3592 conditions per place. [2023-08-31 22:08:03,485 INFO L137 encePairwiseOnDemand]: 750/753 looper letters, 67 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-31 22:08:03,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 82 transitions, 366 flow [2023-08-31 22:08:03,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:08:03,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:08:03,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1000 transitions. [2023-08-31 22:08:03,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426737494466578 [2023-08-31 22:08:03,489 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1000 transitions. [2023-08-31 22:08:03,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1000 transitions. [2023-08-31 22:08:03,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:03,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1000 transitions. [2023-08-31 22:08:03,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 333.3333333333333) internal successors, (1000), 3 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:03,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:03,495 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:03,495 INFO L175 Difference]: Start difference. First operand has 85 places, 83 transitions, 230 flow. Second operand 3 states and 1000 transitions. [2023-08-31 22:08:03,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 82 transitions, 366 flow [2023-08-31 22:08:03,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 82 transitions, 362 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:08:03,497 INFO L231 Difference]: Finished difference. Result has 84 places, 82 transitions, 228 flow [2023-08-31 22:08:03,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=84, PETRI_TRANSITIONS=82} [2023-08-31 22:08:03,498 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -55 predicate places. [2023-08-31 22:08:03,498 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 82 transitions, 228 flow [2023-08-31 22:08:03,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 313.25) internal successors, (1253), 4 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:03,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:03,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:03,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 22:08:03,499 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:03,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:03,500 INFO L85 PathProgramCache]: Analyzing trace with hash 379604633, now seen corresponding path program 1 times [2023-08-31 22:08:03,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:03,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784654759] [2023-08-31 22:08:03,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:03,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:03,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:03,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:03,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784654759] [2023-08-31 22:08:03,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784654759] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:03,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:03,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:08:03,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736328798] [2023-08-31 22:08:03,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:03,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:08:03,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:03,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:08:03,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:08:03,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-31 22:08:03,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 82 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:03,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:03,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-31 22:08:03,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:03,800 INFO L130 PetriNetUnfolder]: 1588/2752 cut-off events. [2023-08-31 22:08:03,800 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2023-08-31 22:08:03,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5517 conditions, 2752 events. 1588/2752 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 11918 event pairs, 763 based on Foata normal form. 62/2200 useless extension candidates. Maximal degree in co-relation 5507. Up to 1688 conditions per place. [2023-08-31 22:08:03,808 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 91 selfloop transitions, 3 changer transitions 0/105 dead transitions. [2023-08-31 22:08:03,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 105 transitions, 456 flow [2023-08-31 22:08:03,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:08:03,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:08:03,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1052 transitions. [2023-08-31 22:08:03,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46569278441788403 [2023-08-31 22:08:03,812 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1052 transitions. [2023-08-31 22:08:03,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1052 transitions. [2023-08-31 22:08:03,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:03,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1052 transitions. [2023-08-31 22:08:03,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:03,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:03,818 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:03,818 INFO L175 Difference]: Start difference. First operand has 84 places, 82 transitions, 228 flow. Second operand 3 states and 1052 transitions. [2023-08-31 22:08:03,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 105 transitions, 456 flow [2023-08-31 22:08:03,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 105 transitions, 431 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-08-31 22:08:03,821 INFO L231 Difference]: Finished difference. Result has 79 places, 78 transitions, 197 flow [2023-08-31 22:08:03,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=79, PETRI_TRANSITIONS=78} [2023-08-31 22:08:03,821 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -60 predicate places. [2023-08-31 22:08:03,821 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 78 transitions, 197 flow [2023-08-31 22:08:03,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:03,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:03,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:03,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 22:08:03,822 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:03,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:03,823 INFO L85 PathProgramCache]: Analyzing trace with hash 236453580, now seen corresponding path program 1 times [2023-08-31 22:08:03,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:03,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839809364] [2023-08-31 22:08:03,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:03,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:03,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:03,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839809364] [2023-08-31 22:08:03,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839809364] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:03,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:03,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:08:03,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96479554] [2023-08-31 22:08:03,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:03,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:08:03,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:03,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:08:03,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:08:04,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 753 [2023-08-31 22:08:04,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:04,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:04,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 753 [2023-08-31 22:08:04,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:04,248 INFO L130 PetriNetUnfolder]: 1451/2557 cut-off events. [2023-08-31 22:08:04,249 INFO L131 PetriNetUnfolder]: For 124/124 co-relation queries the response was YES. [2023-08-31 22:08:04,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5124 conditions, 2557 events. 1451/2557 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 11033 event pairs, 1098 based on Foata normal form. 0/2017 useless extension candidates. Maximal degree in co-relation 5116. Up to 2344 conditions per place. [2023-08-31 22:08:04,260 INFO L137 encePairwiseOnDemand]: 748/753 looper letters, 61 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-31 22:08:04,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 75 transitions, 317 flow [2023-08-31 22:08:04,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:08:04,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:08:04,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1011 transitions. [2023-08-31 22:08:04,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44754316069057104 [2023-08-31 22:08:04,263 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1011 transitions. [2023-08-31 22:08:04,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1011 transitions. [2023-08-31 22:08:04,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:04,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1011 transitions. [2023-08-31 22:08:04,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 337.0) internal successors, (1011), 3 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:04,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:04,268 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:04,269 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 197 flow. Second operand 3 states and 1011 transitions. [2023-08-31 22:08:04,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 75 transitions, 317 flow [2023-08-31 22:08:04,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 75 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:08:04,271 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 192 flow [2023-08-31 22:08:04,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2023-08-31 22:08:04,272 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -62 predicate places. [2023-08-31 22:08:04,272 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 192 flow [2023-08-31 22:08:04,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:04,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:04,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:04,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 22:08:04,273 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:04,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:04,273 INFO L85 PathProgramCache]: Analyzing trace with hash 236453581, now seen corresponding path program 1 times [2023-08-31 22:08:04,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:04,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039793122] [2023-08-31 22:08:04,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:04,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:04,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:04,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:04,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039793122] [2023-08-31 22:08:04,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039793122] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:04,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:04,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 22:08:04,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542152036] [2023-08-31 22:08:04,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:04,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:08:04,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:04,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:08:04,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:08:06,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 753 [2023-08-31 22:08:06,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 192 flow. Second operand has 6 states, 6 states have (on average 300.6666666666667) internal successors, (1804), 6 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:06,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:06,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 753 [2023-08-31 22:08:06,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:07,039 INFO L130 PetriNetUnfolder]: 1542/2690 cut-off events. [2023-08-31 22:08:07,039 INFO L131 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2023-08-31 22:08:07,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5415 conditions, 2690 events. 1542/2690 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 11473 event pairs, 1177 based on Foata normal form. 0/2135 useless extension candidates. Maximal degree in co-relation 5407. Up to 2490 conditions per place. [2023-08-31 22:08:07,047 INFO L137 encePairwiseOnDemand]: 745/753 looper letters, 64 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2023-08-31 22:08:07,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 84 transitions, 368 flow [2023-08-31 22:08:07,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 22:08:07,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 22:08:07,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2169 transitions. [2023-08-31 22:08:07,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41149686966420035 [2023-08-31 22:08:07,053 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2169 transitions. [2023-08-31 22:08:07,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2169 transitions. [2023-08-31 22:08:07,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:07,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2169 transitions. [2023-08-31 22:08:07,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 309.85714285714283) internal successors, (2169), 7 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:07,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 753.0) internal successors, (6024), 8 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:07,064 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 753.0) internal successors, (6024), 8 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:07,064 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 192 flow. Second operand 7 states and 2169 transitions. [2023-08-31 22:08:07,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 84 transitions, 368 flow [2023-08-31 22:08:07,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 84 transitions, 364 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:08:07,066 INFO L231 Difference]: Finished difference. Result has 84 places, 81 transitions, 249 flow [2023-08-31 22:08:07,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=249, PETRI_PLACES=84, PETRI_TRANSITIONS=81} [2023-08-31 22:08:07,067 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -55 predicate places. [2023-08-31 22:08:07,067 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 81 transitions, 249 flow [2023-08-31 22:08:07,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 300.6666666666667) internal successors, (1804), 6 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:07,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:07,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:07,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 22:08:07,069 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:07,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:07,069 INFO L85 PathProgramCache]: Analyzing trace with hash 138579933, now seen corresponding path program 1 times [2023-08-31 22:08:07,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:07,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507864861] [2023-08-31 22:08:07,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:07,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:07,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:07,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:07,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507864861] [2023-08-31 22:08:07,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507864861] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:07,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:07,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:08:07,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996823095] [2023-08-31 22:08:07,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:07,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:08:07,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:07,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:08:07,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:08:07,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-31 22:08:07,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 81 transitions, 249 flow. Second operand has 4 states, 4 states have (on average 322.5) internal successors, (1290), 4 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:07,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:07,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-31 22:08:07,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:07,682 INFO L130 PetriNetUnfolder]: 1435/2530 cut-off events. [2023-08-31 22:08:07,683 INFO L131 PetriNetUnfolder]: For 185/185 co-relation queries the response was YES. [2023-08-31 22:08:07,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5149 conditions, 2530 events. 1435/2530 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 10883 event pairs, 1087 based on Foata normal form. 0/2012 useless extension candidates. Maximal degree in co-relation 5138. Up to 2317 conditions per place. [2023-08-31 22:08:07,694 INFO L137 encePairwiseOnDemand]: 750/753 looper letters, 66 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-31 22:08:07,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 80 transitions, 383 flow [2023-08-31 22:08:07,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:08:07,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:08:07,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1340 transitions. [2023-08-31 22:08:07,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448871181938911 [2023-08-31 22:08:07,698 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1340 transitions. [2023-08-31 22:08:07,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1340 transitions. [2023-08-31 22:08:07,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:07,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1340 transitions. [2023-08-31 22:08:07,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:07,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:07,705 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:07,705 INFO L175 Difference]: Start difference. First operand has 84 places, 81 transitions, 249 flow. Second operand 4 states and 1340 transitions. [2023-08-31 22:08:07,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 80 transitions, 383 flow [2023-08-31 22:08:07,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 80 transitions, 365 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-31 22:08:07,707 INFO L231 Difference]: Finished difference. Result has 83 places, 80 transitions, 233 flow [2023-08-31 22:08:07,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=233, PETRI_PLACES=83, PETRI_TRANSITIONS=80} [2023-08-31 22:08:07,708 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -56 predicate places. [2023-08-31 22:08:07,709 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 80 transitions, 233 flow [2023-08-31 22:08:07,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 322.5) internal successors, (1290), 4 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:07,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:07,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:07,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 22:08:07,710 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:07,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:07,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1009501, now seen corresponding path program 1 times [2023-08-31 22:08:07,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:07,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010683331] [2023-08-31 22:08:07,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:07,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:07,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:07,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010683331] [2023-08-31 22:08:07,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010683331] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:07,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:07,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:08:07,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908639747] [2023-08-31 22:08:07,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:07,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:08:07,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:07,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:08:07,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:08:07,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-31 22:08:07,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 80 transitions, 233 flow. Second operand has 3 states, 3 states have (on average 323.3333333333333) internal successors, (970), 3 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:07,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:07,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-31 22:08:07,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:08,003 INFO L130 PetriNetUnfolder]: 1425/2519 cut-off events. [2023-08-31 22:08:08,004 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-08-31 22:08:08,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5087 conditions, 2519 events. 1425/2519 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 10881 event pairs, 1060 based on Foata normal form. 0/2008 useless extension candidates. Maximal degree in co-relation 5076. Up to 2277 conditions per place. [2023-08-31 22:08:08,014 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 70 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2023-08-31 22:08:08,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 86 transitions, 396 flow [2023-08-31 22:08:08,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:08:08,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:08:08,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1026 transitions. [2023-08-31 22:08:08,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4541832669322709 [2023-08-31 22:08:08,018 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1026 transitions. [2023-08-31 22:08:08,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1026 transitions. [2023-08-31 22:08:08,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:08,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1026 transitions. [2023-08-31 22:08:08,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 342.0) internal successors, (1026), 3 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:08,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:08,023 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:08,023 INFO L175 Difference]: Start difference. First operand has 83 places, 80 transitions, 233 flow. Second operand 3 states and 1026 transitions. [2023-08-31 22:08:08,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 86 transitions, 396 flow [2023-08-31 22:08:08,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 86 transitions, 393 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:08:08,026 INFO L231 Difference]: Finished difference. Result has 83 places, 79 transitions, 236 flow [2023-08-31 22:08:08,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=83, PETRI_TRANSITIONS=79} [2023-08-31 22:08:08,027 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -56 predicate places. [2023-08-31 22:08:08,027 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 79 transitions, 236 flow [2023-08-31 22:08:08,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 323.3333333333333) internal successors, (970), 3 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:08,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:08,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:08,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-31 22:08:08,028 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:08,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:08,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1682506611, now seen corresponding path program 1 times [2023-08-31 22:08:08,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:08,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687554589] [2023-08-31 22:08:08,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:08,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:08,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:08,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687554589] [2023-08-31 22:08:08,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687554589] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:08,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:08,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-31 22:08:08,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547485509] [2023-08-31 22:08:08,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:08,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 22:08:08,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:08,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 22:08:08,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-31 22:08:09,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 753 [2023-08-31 22:08:09,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 79 transitions, 236 flow. Second operand has 8 states, 8 states have (on average 290.625) internal successors, (2325), 8 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:09,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:09,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 753 [2023-08-31 22:08:09,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:10,002 INFO L130 PetriNetUnfolder]: 1631/2857 cut-off events. [2023-08-31 22:08:10,003 INFO L131 PetriNetUnfolder]: For 169/169 co-relation queries the response was YES. [2023-08-31 22:08:10,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5872 conditions, 2857 events. 1631/2857 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 12455 event pairs, 493 based on Foata normal form. 9/2326 useless extension candidates. Maximal degree in co-relation 5861. Up to 2374 conditions per place. [2023-08-31 22:08:10,012 INFO L137 encePairwiseOnDemand]: 744/753 looper letters, 90 selfloop transitions, 13 changer transitions 0/112 dead transitions. [2023-08-31 22:08:10,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 112 transitions, 524 flow [2023-08-31 22:08:10,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 22:08:10,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 22:08:10,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1832 transitions. [2023-08-31 22:08:10,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40548915449313855 [2023-08-31 22:08:10,017 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1832 transitions. [2023-08-31 22:08:10,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1832 transitions. [2023-08-31 22:08:10,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:10,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1832 transitions. [2023-08-31 22:08:10,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 305.3333333333333) internal successors, (1832), 6 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:10,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 753.0) internal successors, (5271), 7 states have internal predecessors, (5271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:10,026 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 753.0) internal successors, (5271), 7 states have internal predecessors, (5271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:10,026 INFO L175 Difference]: Start difference. First operand has 83 places, 79 transitions, 236 flow. Second operand 6 states and 1832 transitions. [2023-08-31 22:08:10,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 112 transitions, 524 flow [2023-08-31 22:08:10,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 112 transitions, 510 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:08:10,030 INFO L231 Difference]: Finished difference. Result has 88 places, 83 transitions, 287 flow [2023-08-31 22:08:10,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=287, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2023-08-31 22:08:10,030 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -51 predicate places. [2023-08-31 22:08:10,031 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 287 flow [2023-08-31 22:08:10,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 290.625) internal successors, (2325), 8 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:10,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:10,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:10,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 22:08:10,032 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:10,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:10,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1552665017, now seen corresponding path program 2 times [2023-08-31 22:08:10,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:10,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544992537] [2023-08-31 22:08:10,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:10,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:10,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:10,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544992537] [2023-08-31 22:08:10,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544992537] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:10,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:10,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-31 22:08:10,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590362204] [2023-08-31 22:08:10,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:10,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 22:08:10,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:10,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 22:08:10,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-31 22:08:14,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 753 [2023-08-31 22:08:14,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 287 flow. Second operand has 8 states, 8 states have (on average 289.625) internal successors, (2317), 8 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:14,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:14,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 753 [2023-08-31 22:08:14,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:14,865 INFO L130 PetriNetUnfolder]: 1665/2951 cut-off events. [2023-08-31 22:08:14,866 INFO L131 PetriNetUnfolder]: For 395/395 co-relation queries the response was YES. [2023-08-31 22:08:14,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6155 conditions, 2951 events. 1665/2951 cut-off events. For 395/395 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 13110 event pairs, 1216 based on Foata normal form. 18/2417 useless extension candidates. Maximal degree in co-relation 6142. Up to 2446 conditions per place. [2023-08-31 22:08:14,875 INFO L137 encePairwiseOnDemand]: 745/753 looper letters, 76 selfloop transitions, 13 changer transitions 0/98 dead transitions. [2023-08-31 22:08:14,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 98 transitions, 502 flow [2023-08-31 22:08:14,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 22:08:14,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 22:08:14,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2101 transitions. [2023-08-31 22:08:14,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39859609182318345 [2023-08-31 22:08:14,880 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2101 transitions. [2023-08-31 22:08:14,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2101 transitions. [2023-08-31 22:08:14,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:14,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2101 transitions. [2023-08-31 22:08:14,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 300.14285714285717) internal successors, (2101), 7 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:14,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 753.0) internal successors, (6024), 8 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:14,889 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 753.0) internal successors, (6024), 8 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:14,889 INFO L175 Difference]: Start difference. First operand has 88 places, 83 transitions, 287 flow. Second operand 7 states and 2101 transitions. [2023-08-31 22:08:14,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 98 transitions, 502 flow [2023-08-31 22:08:14,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 98 transitions, 483 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-31 22:08:14,893 INFO L231 Difference]: Finished difference. Result has 92 places, 82 transitions, 307 flow [2023-08-31 22:08:14,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=307, PETRI_PLACES=92, PETRI_TRANSITIONS=82} [2023-08-31 22:08:14,893 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -47 predicate places. [2023-08-31 22:08:14,893 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 82 transitions, 307 flow [2023-08-31 22:08:14,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 289.625) internal successors, (2317), 8 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:14,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:14,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:14,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 22:08:14,894 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:14,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:14,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1611999738, now seen corresponding path program 1 times [2023-08-31 22:08:14,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:14,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307367353] [2023-08-31 22:08:14,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:14,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:15,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:15,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307367353] [2023-08-31 22:08:15,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307367353] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:15,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:15,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-31 22:08:15,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006712536] [2023-08-31 22:08:15,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:15,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 22:08:15,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:15,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 22:08:15,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-31 22:08:16,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 753 [2023-08-31 22:08:16,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 82 transitions, 307 flow. Second operand has 10 states, 10 states have (on average 285.3) internal successors, (2853), 10 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:16,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:16,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 753 [2023-08-31 22:08:16,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:17,083 INFO L130 PetriNetUnfolder]: 1664/2928 cut-off events. [2023-08-31 22:08:17,083 INFO L131 PetriNetUnfolder]: For 324/324 co-relation queries the response was YES. [2023-08-31 22:08:17,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6180 conditions, 2928 events. 1664/2928 cut-off events. For 324/324 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 12849 event pairs, 1258 based on Foata normal form. 0/2375 useless extension candidates. Maximal degree in co-relation 6165. Up to 2697 conditions per place. [2023-08-31 22:08:17,091 INFO L137 encePairwiseOnDemand]: 742/753 looper letters, 74 selfloop transitions, 17 changer transitions 0/100 dead transitions. [2023-08-31 22:08:17,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 100 transitions, 537 flow [2023-08-31 22:08:17,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 22:08:17,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 22:08:17,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2642 transitions. [2023-08-31 22:08:17,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898480153460233 [2023-08-31 22:08:17,096 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2642 transitions. [2023-08-31 22:08:17,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2642 transitions. [2023-08-31 22:08:17,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:17,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2642 transitions. [2023-08-31 22:08:17,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 293.55555555555554) internal successors, (2642), 9 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:17,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 753.0) internal successors, (7530), 10 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:17,107 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 753.0) internal successors, (7530), 10 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:17,107 INFO L175 Difference]: Start difference. First operand has 92 places, 82 transitions, 307 flow. Second operand 9 states and 2642 transitions. [2023-08-31 22:08:17,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 100 transitions, 537 flow [2023-08-31 22:08:17,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 100 transitions, 517 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-31 22:08:17,111 INFO L231 Difference]: Finished difference. Result has 99 places, 89 transitions, 368 flow [2023-08-31 22:08:17,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=368, PETRI_PLACES=99, PETRI_TRANSITIONS=89} [2023-08-31 22:08:17,111 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -40 predicate places. [2023-08-31 22:08:17,111 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 89 transitions, 368 flow [2023-08-31 22:08:17,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 285.3) internal successors, (2853), 10 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:17,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:17,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:17,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 22:08:17,112 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:17,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:17,112 INFO L85 PathProgramCache]: Analyzing trace with hash 829469450, now seen corresponding path program 1 times [2023-08-31 22:08:17,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:17,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270547011] [2023-08-31 22:08:17,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:17,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:17,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:17,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270547011] [2023-08-31 22:08:17,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270547011] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:17,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:17,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-31 22:08:17,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304901955] [2023-08-31 22:08:17,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:17,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 22:08:17,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:17,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 22:08:17,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-08-31 22:08:19,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 753 [2023-08-31 22:08:19,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 89 transitions, 368 flow. Second operand has 12 states, 12 states have (on average 278.1666666666667) internal successors, (3338), 12 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:19,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:19,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 753 [2023-08-31 22:08:19,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:20,601 INFO L130 PetriNetUnfolder]: 1824/3209 cut-off events. [2023-08-31 22:08:20,602 INFO L131 PetriNetUnfolder]: For 400/400 co-relation queries the response was YES. [2023-08-31 22:08:20,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6889 conditions, 3209 events. 1824/3209 cut-off events. For 400/400 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 14462 event pairs, 565 based on Foata normal form. 0/2614 useless extension candidates. Maximal degree in co-relation 6871. Up to 2222 conditions per place. [2023-08-31 22:08:20,618 INFO L137 encePairwiseOnDemand]: 742/753 looper letters, 115 selfloop transitions, 23 changer transitions 0/147 dead transitions. [2023-08-31 22:08:20,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 147 transitions, 776 flow [2023-08-31 22:08:20,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 22:08:20,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 22:08:20,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2617 transitions. [2023-08-31 22:08:20,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38615906743396783 [2023-08-31 22:08:20,624 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2617 transitions. [2023-08-31 22:08:20,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2617 transitions. [2023-08-31 22:08:20,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:20,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2617 transitions. [2023-08-31 22:08:20,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 290.77777777777777) internal successors, (2617), 9 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:20,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 753.0) internal successors, (7530), 10 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:20,635 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 753.0) internal successors, (7530), 10 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:20,635 INFO L175 Difference]: Start difference. First operand has 99 places, 89 transitions, 368 flow. Second operand 9 states and 2617 transitions. [2023-08-31 22:08:20,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 147 transitions, 776 flow [2023-08-31 22:08:20,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 147 transitions, 748 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-31 22:08:20,639 INFO L231 Difference]: Finished difference. Result has 104 places, 92 transitions, 423 flow [2023-08-31 22:08:20,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=423, PETRI_PLACES=104, PETRI_TRANSITIONS=92} [2023-08-31 22:08:20,640 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -35 predicate places. [2023-08-31 22:08:20,640 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 92 transitions, 423 flow [2023-08-31 22:08:20,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 278.1666666666667) internal successors, (3338), 12 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:08:20,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:20,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:20,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-31 22:08:20,641 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:20,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:20,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1567339102, now seen corresponding path program 2 times [2023-08-31 22:08:20,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:20,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578599017] [2023-08-31 22:08:20,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:20,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:10:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:10:27,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:10:27,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578599017] [2023-08-31 22:10:27,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578599017] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:10:27,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:10:27,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-31 22:10:27,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525267107] [2023-08-31 22:10:27,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:10:27,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 22:10:27,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:10:27,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 22:10:27,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-08-31 22:11:07,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 753 [2023-08-31 22:11:07,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 92 transitions, 423 flow. Second operand has 13 states, 13 states have (on average 267.0769230769231) internal successors, (3472), 13 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:07,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:11:07,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 753 [2023-08-31 22:11:07,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:11:14,794 INFO L130 PetriNetUnfolder]: 2089/3679 cut-off events. [2023-08-31 22:11:14,794 INFO L131 PetriNetUnfolder]: For 867/867 co-relation queries the response was YES. [2023-08-31 22:11:14,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8200 conditions, 3679 events. 2089/3679 cut-off events. For 867/867 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 17436 event pairs, 1345 based on Foata normal form. 0/2988 useless extension candidates. Maximal degree in co-relation 8180. Up to 2499 conditions per place. [2023-08-31 22:11:14,806 INFO L137 encePairwiseOnDemand]: 739/753 looper letters, 119 selfloop transitions, 30 changer transitions 0/158 dead transitions. [2023-08-31 22:11:14,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 158 transitions, 912 flow [2023-08-31 22:11:14,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 22:11:14,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 22:11:14,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3595 transitions. [2023-08-31 22:11:14,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3672489529063234 [2023-08-31 22:11:14,810 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3595 transitions. [2023-08-31 22:11:14,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3595 transitions. [2023-08-31 22:11:14,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:11:14,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3595 transitions. [2023-08-31 22:11:14,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 276.53846153846155) internal successors, (3595), 13 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:14,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 753.0) internal successors, (10542), 14 states have internal predecessors, (10542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:14,824 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 753.0) internal successors, (10542), 14 states have internal predecessors, (10542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:14,824 INFO L175 Difference]: Start difference. First operand has 104 places, 92 transitions, 423 flow. Second operand 13 states and 3595 transitions. [2023-08-31 22:11:14,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 158 transitions, 912 flow [2023-08-31 22:11:14,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 158 transitions, 866 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-08-31 22:11:14,830 INFO L231 Difference]: Finished difference. Result has 115 places, 102 transitions, 556 flow [2023-08-31 22:11:14,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=556, PETRI_PLACES=115, PETRI_TRANSITIONS=102} [2023-08-31 22:11:14,831 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -24 predicate places. [2023-08-31 22:11:14,831 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 102 transitions, 556 flow [2023-08-31 22:11:14,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 267.0769230769231) internal successors, (3472), 13 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:14,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:11:14,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:11:14,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-31 22:11:14,832 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:11:14,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:11:14,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1567656232, now seen corresponding path program 3 times [2023-08-31 22:11:14,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:11:14,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106597861] [2023-08-31 22:11:14,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:11:14,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:11:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:11:15,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:11:15,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:11:15,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106597861] [2023-08-31 22:11:15,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106597861] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:11:15,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:11:15,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-31 22:11:15,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175892363] [2023-08-31 22:11:15,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:11:15,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 22:11:15,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:11:15,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 22:11:15,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-08-31 22:11:19,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 753 [2023-08-31 22:11:19,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 102 transitions, 556 flow. Second operand has 12 states, 12 states have (on average 265.1666666666667) internal successors, (3182), 12 states have internal predecessors, (3182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:19,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:11:19,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 753 [2023-08-31 22:11:19,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:11:21,219 INFO L130 PetriNetUnfolder]: 2076/3660 cut-off events. [2023-08-31 22:11:21,220 INFO L131 PetriNetUnfolder]: For 1290/1290 co-relation queries the response was YES. [2023-08-31 22:11:21,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8355 conditions, 3660 events. 2076/3660 cut-off events. For 1290/1290 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 17292 event pairs, 1375 based on Foata normal form. 0/2982 useless extension candidates. Maximal degree in co-relation 8330. Up to 2501 conditions per place. [2023-08-31 22:11:21,236 INFO L137 encePairwiseOnDemand]: 740/753 looper letters, 108 selfloop transitions, 27 changer transitions 0/143 dead transitions. [2023-08-31 22:11:21,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 143 transitions, 911 flow [2023-08-31 22:11:21,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 22:11:21,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 22:11:21,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2761 transitions. [2023-08-31 22:11:21,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2023-08-31 22:11:21,240 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2761 transitions. [2023-08-31 22:11:21,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2761 transitions. [2023-08-31 22:11:21,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:11:21,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2761 transitions. [2023-08-31 22:11:21,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 276.1) internal successors, (2761), 10 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:21,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:21,251 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:21,251 INFO L175 Difference]: Start difference. First operand has 115 places, 102 transitions, 556 flow. Second operand 10 states and 2761 transitions. [2023-08-31 22:11:21,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 143 transitions, 911 flow [2023-08-31 22:11:21,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 143 transitions, 874 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-31 22:11:21,258 INFO L231 Difference]: Finished difference. Result has 116 places, 100 transitions, 565 flow [2023-08-31 22:11:21,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=565, PETRI_PLACES=116, PETRI_TRANSITIONS=100} [2023-08-31 22:11:21,259 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -23 predicate places. [2023-08-31 22:11:21,259 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 100 transitions, 565 flow [2023-08-31 22:11:21,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 265.1666666666667) internal successors, (3182), 12 states have internal predecessors, (3182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:21,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:11:21,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:11:21,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-31 22:11:21,260 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:11:21,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:11:21,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1027074210, now seen corresponding path program 1 times [2023-08-31 22:11:21,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:11:21,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550104924] [2023-08-31 22:11:21,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:11:21,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:11:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:11:21,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:11:21,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:11:21,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550104924] [2023-08-31 22:11:21,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550104924] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:11:21,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:11:21,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-31 22:11:21,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422837362] [2023-08-31 22:11:21,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:11:21,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 22:11:21,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:11:21,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 22:11:21,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-31 22:11:23,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 753 [2023-08-31 22:11:23,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 100 transitions, 565 flow. Second operand has 11 states, 11 states have (on average 270.54545454545456) internal successors, (2976), 11 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:23,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:11:23,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 753 [2023-08-31 22:11:23,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:11:23,716 INFO L130 PetriNetUnfolder]: 2235/3928 cut-off events. [2023-08-31 22:11:23,716 INFO L131 PetriNetUnfolder]: For 1582/1582 co-relation queries the response was YES. [2023-08-31 22:11:23,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9160 conditions, 3928 events. 2235/3928 cut-off events. For 1582/1582 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 18836 event pairs, 1557 based on Foata normal form. 0/3201 useless extension candidates. Maximal degree in co-relation 9135. Up to 3373 conditions per place. [2023-08-31 22:11:23,731 INFO L137 encePairwiseOnDemand]: 743/753 looper letters, 109 selfloop transitions, 20 changer transitions 0/137 dead transitions. [2023-08-31 22:11:23,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 137 transitions, 962 flow [2023-08-31 22:11:23,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 22:11:23,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 22:11:23,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2797 transitions. [2023-08-31 22:11:23,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37144754316069056 [2023-08-31 22:11:23,734 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2797 transitions. [2023-08-31 22:11:23,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2797 transitions. [2023-08-31 22:11:23,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:11:23,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2797 transitions. [2023-08-31 22:11:23,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 279.7) internal successors, (2797), 10 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:23,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:23,743 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:23,743 INFO L175 Difference]: Start difference. First operand has 116 places, 100 transitions, 565 flow. Second operand 10 states and 2797 transitions. [2023-08-31 22:11:23,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 137 transitions, 962 flow [2023-08-31 22:11:23,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 137 transitions, 896 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-31 22:11:23,752 INFO L231 Difference]: Finished difference. Result has 119 places, 104 transitions, 608 flow [2023-08-31 22:11:23,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=608, PETRI_PLACES=119, PETRI_TRANSITIONS=104} [2023-08-31 22:11:23,752 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -20 predicate places. [2023-08-31 22:11:23,752 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 104 transitions, 608 flow [2023-08-31 22:11:23,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 270.54545454545456) internal successors, (2976), 11 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:23,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:11:23,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:11:23,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-31 22:11:23,753 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:11:23,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:11:23,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1146690374, now seen corresponding path program 1 times [2023-08-31 22:11:23,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:11:23,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039515692] [2023-08-31 22:11:23,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:11:23,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:11:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:11:24,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:11:24,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:11:24,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039515692] [2023-08-31 22:11:24,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039515692] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:11:24,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:11:24,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-31 22:11:24,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207958702] [2023-08-31 22:11:24,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:11:24,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 22:11:24,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:11:24,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 22:11:24,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-08-31 22:11:26,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 753 [2023-08-31 22:11:26,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 104 transitions, 608 flow. Second operand has 12 states, 12 states have (on average 268.5) internal successors, (3222), 12 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:26,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:11:26,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 753 [2023-08-31 22:11:26,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:11:27,044 INFO L130 PetriNetUnfolder]: 2209/3888 cut-off events. [2023-08-31 22:11:27,044 INFO L131 PetriNetUnfolder]: For 1608/1608 co-relation queries the response was YES. [2023-08-31 22:11:27,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9065 conditions, 3888 events. 2209/3888 cut-off events. For 1608/1608 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 18624 event pairs, 669 based on Foata normal form. 18/3270 useless extension candidates. Maximal degree in co-relation 9037. Up to 2362 conditions per place. [2023-08-31 22:11:27,061 INFO L137 encePairwiseOnDemand]: 743/753 looper letters, 122 selfloop transitions, 29 changer transitions 0/159 dead transitions. [2023-08-31 22:11:27,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 159 transitions, 1036 flow [2023-08-31 22:11:27,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 22:11:27,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 22:11:27,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2525 transitions. [2023-08-31 22:11:27,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3725837391176037 [2023-08-31 22:11:27,064 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2525 transitions. [2023-08-31 22:11:27,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2525 transitions. [2023-08-31 22:11:27,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:11:27,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2525 transitions. [2023-08-31 22:11:27,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 280.55555555555554) internal successors, (2525), 9 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:27,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 753.0) internal successors, (7530), 10 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:27,071 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 753.0) internal successors, (7530), 10 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:27,071 INFO L175 Difference]: Start difference. First operand has 119 places, 104 transitions, 608 flow. Second operand 9 states and 2525 transitions. [2023-08-31 22:11:27,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 159 transitions, 1036 flow [2023-08-31 22:11:27,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 159 transitions, 1009 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 22:11:27,081 INFO L231 Difference]: Finished difference. Result has 122 places, 104 transitions, 651 flow [2023-08-31 22:11:27,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=651, PETRI_PLACES=122, PETRI_TRANSITIONS=104} [2023-08-31 22:11:27,081 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -17 predicate places. [2023-08-31 22:11:27,082 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 104 transitions, 651 flow [2023-08-31 22:11:27,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 268.5) internal successors, (3222), 12 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:27,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:11:27,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:11:27,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-31 22:11:27,083 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:11:27,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:11:27,083 INFO L85 PathProgramCache]: Analyzing trace with hash -2037496838, now seen corresponding path program 2 times [2023-08-31 22:11:27,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:11:27,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636741089] [2023-08-31 22:11:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:11:27,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:11:27,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:11:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:11:27,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:11:27,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636741089] [2023-08-31 22:11:27,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636741089] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:11:27,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:11:27,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-31 22:11:27,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105086208] [2023-08-31 22:11:27,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:11:27,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 22:11:27,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:11:27,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 22:11:27,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-08-31 22:11:29,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 753 [2023-08-31 22:11:29,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 104 transitions, 651 flow. Second operand has 12 states, 12 states have (on average 268.5) internal successors, (3222), 12 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:29,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:11:29,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 753 [2023-08-31 22:11:29,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:11:30,746 INFO L130 PetriNetUnfolder]: 2196/3858 cut-off events. [2023-08-31 22:11:30,746 INFO L131 PetriNetUnfolder]: For 2360/2360 co-relation queries the response was YES. [2023-08-31 22:11:30,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9254 conditions, 3858 events. 2196/3858 cut-off events. For 2360/2360 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 18387 event pairs, 573 based on Foata normal form. 9/3235 useless extension candidates. Maximal degree in co-relation 9225. Up to 2070 conditions per place. [2023-08-31 22:11:30,762 INFO L137 encePairwiseOnDemand]: 743/753 looper letters, 118 selfloop transitions, 30 changer transitions 0/156 dead transitions. [2023-08-31 22:11:30,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 156 transitions, 1063 flow [2023-08-31 22:11:30,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 22:11:30,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 22:11:30,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2788 transitions. [2023-08-31 22:11:30,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3702523240371846 [2023-08-31 22:11:30,765 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2788 transitions. [2023-08-31 22:11:30,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2788 transitions. [2023-08-31 22:11:30,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:11:30,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2788 transitions. [2023-08-31 22:11:30,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 278.8) internal successors, (2788), 10 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:30,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:30,774 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:30,774 INFO L175 Difference]: Start difference. First operand has 122 places, 104 transitions, 651 flow. Second operand 10 states and 2788 transitions. [2023-08-31 22:11:30,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 156 transitions, 1063 flow [2023-08-31 22:11:30,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 156 transitions, 1024 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-31 22:11:30,785 INFO L231 Difference]: Finished difference. Result has 126 places, 105 transitions, 693 flow [2023-08-31 22:11:30,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=693, PETRI_PLACES=126, PETRI_TRANSITIONS=105} [2023-08-31 22:11:30,785 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -13 predicate places. [2023-08-31 22:11:30,785 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 105 transitions, 693 flow [2023-08-31 22:11:30,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 268.5) internal successors, (3222), 12 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:30,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:11:30,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:11:30,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-31 22:11:30,786 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:11:30,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:11:30,787 INFO L85 PathProgramCache]: Analyzing trace with hash 278044459, now seen corresponding path program 1 times [2023-08-31 22:11:30,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:11:30,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086565087] [2023-08-31 22:11:30,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:11:30,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:11:30,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:11:31,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:11:31,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:11:31,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086565087] [2023-08-31 22:11:31,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086565087] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:11:31,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:11:31,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-31 22:11:31,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693305785] [2023-08-31 22:11:31,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:11:31,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 22:11:31,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:11:31,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 22:11:31,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-31 22:11:32,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 753 [2023-08-31 22:11:32,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 105 transitions, 693 flow. Second operand has 13 states, 13 states have (on average 282.7692307692308) internal successors, (3676), 13 states have internal predecessors, (3676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:32,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:11:32,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 753 [2023-08-31 22:11:32,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:11:33,509 INFO L130 PetriNetUnfolder]: 2290/4019 cut-off events. [2023-08-31 22:11:33,509 INFO L131 PetriNetUnfolder]: For 3014/3014 co-relation queries the response was YES. [2023-08-31 22:11:33,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9745 conditions, 4019 events. 2290/4019 cut-off events. For 3014/3014 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 19277 event pairs, 1554 based on Foata normal form. 0/3360 useless extension candidates. Maximal degree in co-relation 9715. Up to 3317 conditions per place. [2023-08-31 22:11:33,528 INFO L137 encePairwiseOnDemand]: 737/753 looper letters, 140 selfloop transitions, 33 changer transitions 0/181 dead transitions. [2023-08-31 22:11:33,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 181 transitions, 1261 flow [2023-08-31 22:11:33,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 22:11:33,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 22:11:33,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4646 transitions. [2023-08-31 22:11:33,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3856241699867198 [2023-08-31 22:11:33,533 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4646 transitions. [2023-08-31 22:11:33,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4646 transitions. [2023-08-31 22:11:33,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:11:33,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4646 transitions. [2023-08-31 22:11:33,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 290.375) internal successors, (4646), 16 states have internal predecessors, (4646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:33,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 753.0) internal successors, (12801), 17 states have internal predecessors, (12801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:33,546 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 753.0) internal successors, (12801), 17 states have internal predecessors, (12801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:33,546 INFO L175 Difference]: Start difference. First operand has 126 places, 105 transitions, 693 flow. Second operand 16 states and 4646 transitions. [2023-08-31 22:11:33,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 181 transitions, 1261 flow [2023-08-31 22:11:33,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 181 transitions, 1213 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-31 22:11:33,558 INFO L231 Difference]: Finished difference. Result has 141 places, 120 transitions, 828 flow [2023-08-31 22:11:33,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=828, PETRI_PLACES=141, PETRI_TRANSITIONS=120} [2023-08-31 22:11:33,559 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 2 predicate places. [2023-08-31 22:11:33,559 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 120 transitions, 828 flow [2023-08-31 22:11:33,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 282.7692307692308) internal successors, (3676), 13 states have internal predecessors, (3676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:33,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:11:33,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:11:33,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-31 22:11:33,560 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:11:33,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:11:33,561 INFO L85 PathProgramCache]: Analyzing trace with hash -743280340, now seen corresponding path program 1 times [2023-08-31 22:11:33,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:11:33,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383758701] [2023-08-31 22:11:33,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:11:33,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:11:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:11:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:11:33,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:11:33,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383758701] [2023-08-31 22:11:33,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383758701] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:11:33,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:11:33,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:11:33,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503843128] [2023-08-31 22:11:33,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:11:33,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:11:33,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:11:33,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:11:33,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:11:33,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 753 [2023-08-31 22:11:33,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 120 transitions, 828 flow. Second operand has 3 states, 3 states have (on average 328.6666666666667) internal successors, (986), 3 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:33,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:11:33,642 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 753 [2023-08-31 22:11:33,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:11:34,372 INFO L130 PetriNetUnfolder]: 3507/6511 cut-off events. [2023-08-31 22:11:34,372 INFO L131 PetriNetUnfolder]: For 5158/5173 co-relation queries the response was YES. [2023-08-31 22:11:34,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15628 conditions, 6511 events. 3507/6511 cut-off events. For 5158/5173 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 38350 event pairs, 1626 based on Foata normal form. 13/5634 useless extension candidates. Maximal degree in co-relation 15591. Up to 3549 conditions per place. [2023-08-31 22:11:34,432 INFO L137 encePairwiseOnDemand]: 750/753 looper letters, 171 selfloop transitions, 2 changer transitions 0/190 dead transitions. [2023-08-31 22:11:34,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 190 transitions, 1568 flow [2023-08-31 22:11:34,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:11:34,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:11:34,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1066 transitions. [2023-08-31 22:11:34,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4718902169101372 [2023-08-31 22:11:34,435 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1066 transitions. [2023-08-31 22:11:34,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1066 transitions. [2023-08-31 22:11:34,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:11:34,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1066 transitions. [2023-08-31 22:11:34,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 355.3333333333333) internal successors, (1066), 3 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:34,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:34,438 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:34,438 INFO L175 Difference]: Start difference. First operand has 141 places, 120 transitions, 828 flow. Second operand 3 states and 1066 transitions. [2023-08-31 22:11:34,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 190 transitions, 1568 flow [2023-08-31 22:11:34,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 190 transitions, 1530 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-08-31 22:11:34,454 INFO L231 Difference]: Finished difference. Result has 137 places, 121 transitions, 807 flow [2023-08-31 22:11:34,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=807, PETRI_PLACES=137, PETRI_TRANSITIONS=121} [2023-08-31 22:11:34,455 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -2 predicate places. [2023-08-31 22:11:34,455 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 121 transitions, 807 flow [2023-08-31 22:11:34,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 328.6666666666667) internal successors, (986), 3 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:34,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:11:34,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:11:34,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-31 22:11:34,456 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:11:34,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:11:34,456 INFO L85 PathProgramCache]: Analyzing trace with hash 666388507, now seen corresponding path program 1 times [2023-08-31 22:11:34,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:11:34,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261066733] [2023-08-31 22:11:34,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:11:34,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:11:34,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:11:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:11:34,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:11:34,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261066733] [2023-08-31 22:11:34,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261066733] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:11:34,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:11:34,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:11:34,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089461392] [2023-08-31 22:11:34,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:11:34,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:11:34,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:11:34,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:11:34,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:11:34,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 753 [2023-08-31 22:11:34,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 121 transitions, 807 flow. Second operand has 4 states, 4 states have (on average 321.5) internal successors, (1286), 4 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:34,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:11:34,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 753 [2023-08-31 22:11:34,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:11:35,732 INFO L130 PetriNetUnfolder]: 4385/7753 cut-off events. [2023-08-31 22:11:35,732 INFO L131 PetriNetUnfolder]: For 6341/6352 co-relation queries the response was YES. [2023-08-31 22:11:35,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20465 conditions, 7753 events. 4385/7753 cut-off events. For 6341/6352 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 46461 event pairs, 1938 based on Foata normal form. 11/6994 useless extension candidates. Maximal degree in co-relation 20426. Up to 5843 conditions per place. [2023-08-31 22:11:35,772 INFO L137 encePairwiseOnDemand]: 748/753 looper letters, 148 selfloop transitions, 3 changer transitions 0/168 dead transitions. [2023-08-31 22:11:35,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 168 transitions, 1292 flow [2023-08-31 22:11:35,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:11:35,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:11:35,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1356 transitions. [2023-08-31 22:11:35,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450199203187251 [2023-08-31 22:11:35,773 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1356 transitions. [2023-08-31 22:11:35,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1356 transitions. [2023-08-31 22:11:35,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:11:35,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1356 transitions. [2023-08-31 22:11:35,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:35,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:35,776 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:35,776 INFO L175 Difference]: Start difference. First operand has 137 places, 121 transitions, 807 flow. Second operand 4 states and 1356 transitions. [2023-08-31 22:11:35,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 168 transitions, 1292 flow [2023-08-31 22:11:35,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 168 transitions, 1288 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:11:35,796 INFO L231 Difference]: Finished difference. Result has 140 places, 122 transitions, 821 flow [2023-08-31 22:11:35,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=821, PETRI_PLACES=140, PETRI_TRANSITIONS=122} [2023-08-31 22:11:35,796 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 1 predicate places. [2023-08-31 22:11:35,797 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 122 transitions, 821 flow [2023-08-31 22:11:35,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 321.5) internal successors, (1286), 4 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:35,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:11:35,797 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:11:35,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-31 22:11:35,798 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:11:35,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:11:35,798 INFO L85 PathProgramCache]: Analyzing trace with hash -389843816, now seen corresponding path program 1 times [2023-08-31 22:11:35,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:11:35,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194552018] [2023-08-31 22:11:35,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:11:35,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:11:35,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:11:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:11:35,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:11:35,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194552018] [2023-08-31 22:11:35,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194552018] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:11:35,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:11:35,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:11:35,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028324256] [2023-08-31 22:11:35,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:11:35,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:11:35,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:11:35,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:11:35,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:11:35,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 753 [2023-08-31 22:11:35,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 122 transitions, 821 flow. Second operand has 3 states, 3 states have (on average 327.3333333333333) internal successors, (982), 3 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:35,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:11:35,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 753 [2023-08-31 22:11:35,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:11:36,299 INFO L130 PetriNetUnfolder]: 2775/5047 cut-off events. [2023-08-31 22:11:36,300 INFO L131 PetriNetUnfolder]: For 5031/5042 co-relation queries the response was YES. [2023-08-31 22:11:36,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13941 conditions, 5047 events. 2775/5047 cut-off events. For 5031/5042 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 28180 event pairs, 1432 based on Foata normal form. 11/4844 useless extension candidates. Maximal degree in co-relation 13901. Up to 2521 conditions per place. [2023-08-31 22:11:36,331 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 122 selfloop transitions, 3 changer transitions 0/139 dead transitions. [2023-08-31 22:11:36,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 139 transitions, 1140 flow [2023-08-31 22:11:36,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:11:36,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:11:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1030 transitions. [2023-08-31 22:11:36,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45595396193005755 [2023-08-31 22:11:36,333 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1030 transitions. [2023-08-31 22:11:36,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1030 transitions. [2023-08-31 22:11:36,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:11:36,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1030 transitions. [2023-08-31 22:11:36,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 343.3333333333333) internal successors, (1030), 3 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:36,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:36,336 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:36,336 INFO L175 Difference]: Start difference. First operand has 140 places, 122 transitions, 821 flow. Second operand 3 states and 1030 transitions. [2023-08-31 22:11:36,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 139 transitions, 1140 flow [2023-08-31 22:11:36,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 139 transitions, 1132 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 22:11:36,353 INFO L231 Difference]: Finished difference. Result has 141 places, 122 transitions, 828 flow [2023-08-31 22:11:36,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=828, PETRI_PLACES=141, PETRI_TRANSITIONS=122} [2023-08-31 22:11:36,354 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 2 predicate places. [2023-08-31 22:11:36,354 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 122 transitions, 828 flow [2023-08-31 22:11:36,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 327.3333333333333) internal successors, (982), 3 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:36,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:11:36,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:11:36,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-31 22:11:36,355 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:11:36,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:11:36,355 INFO L85 PathProgramCache]: Analyzing trace with hash -474233831, now seen corresponding path program 1 times [2023-08-31 22:11:36,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:11:36,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689937909] [2023-08-31 22:11:36,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:11:36,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:11:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:11:36,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:11:36,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:11:36,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689937909] [2023-08-31 22:11:36,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689937909] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:11:36,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:11:36,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:11:36,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216791773] [2023-08-31 22:11:36,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:11:36,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:11:36,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:11:36,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:11:36,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:11:36,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 753 [2023-08-31 22:11:36,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 122 transitions, 828 flow. Second operand has 3 states, 3 states have (on average 326.0) internal successors, (978), 3 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:36,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:11:36,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 753 [2023-08-31 22:11:36,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:11:36,888 INFO L130 PetriNetUnfolder]: 2270/4315 cut-off events. [2023-08-31 22:11:36,889 INFO L131 PetriNetUnfolder]: For 3323/3326 co-relation queries the response was YES. [2023-08-31 22:11:36,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11882 conditions, 4315 events. 2270/4315 cut-off events. For 3323/3326 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 23431 event pairs, 619 based on Foata normal form. 375/4589 useless extension candidates. Maximal degree in co-relation 11841. Up to 2858 conditions per place. [2023-08-31 22:11:36,915 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 114 selfloop transitions, 7 changer transitions 0/135 dead transitions. [2023-08-31 22:11:36,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 135 transitions, 1126 flow [2023-08-31 22:11:36,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:11:36,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:11:36,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1021 transitions. [2023-08-31 22:11:36,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45196989818503763 [2023-08-31 22:11:36,916 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1021 transitions. [2023-08-31 22:11:36,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1021 transitions. [2023-08-31 22:11:36,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:11:36,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1021 transitions. [2023-08-31 22:11:36,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 340.3333333333333) internal successors, (1021), 3 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:36,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:36,919 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:36,919 INFO L175 Difference]: Start difference. First operand has 141 places, 122 transitions, 828 flow. Second operand 3 states and 1021 transitions. [2023-08-31 22:11:36,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 135 transitions, 1126 flow [2023-08-31 22:11:36,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 135 transitions, 1120 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:11:36,930 INFO L231 Difference]: Finished difference. Result has 141 places, 122 transitions, 836 flow [2023-08-31 22:11:36,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=836, PETRI_PLACES=141, PETRI_TRANSITIONS=122} [2023-08-31 22:11:36,931 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 2 predicate places. [2023-08-31 22:11:36,931 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 122 transitions, 836 flow [2023-08-31 22:11:36,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 326.0) internal successors, (978), 3 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:36,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:11:36,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:11:36,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-31 22:11:36,932 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:11:36,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:11:36,932 INFO L85 PathProgramCache]: Analyzing trace with hash -661974617, now seen corresponding path program 1 times [2023-08-31 22:11:36,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:11:36,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946332666] [2023-08-31 22:11:36,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:11:36,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:11:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:11:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:11:37,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:11:37,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946332666] [2023-08-31 22:11:37,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946332666] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:11:37,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619153082] [2023-08-31 22:11:37,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:11:37,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:11:37,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:11:37,021 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:11:37,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 22:11:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:11:37,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 22:11:37,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:11:37,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:11:37,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:11:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:11:37,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619153082] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:11:37,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:11:37,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-31 22:11:37,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829632160] [2023-08-31 22:11:37,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:11:37,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 22:11:37,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:11:37,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 22:11:37,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 22:11:37,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-31 22:11:37,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 122 transitions, 836 flow. Second operand has 7 states, 7 states have (on average 325.2857142857143) internal successors, (2277), 7 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:37,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:11:37,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-31 22:11:37,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:11:38,330 INFO L130 PetriNetUnfolder]: 3466/7091 cut-off events. [2023-08-31 22:11:38,330 INFO L131 PetriNetUnfolder]: For 5649/5674 co-relation queries the response was YES. [2023-08-31 22:11:38,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19182 conditions, 7091 events. 3466/7091 cut-off events. For 5649/5674 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 47032 event pairs, 538 based on Foata normal form. 611/7386 useless extension candidates. Maximal degree in co-relation 19141. Up to 1443 conditions per place. [2023-08-31 22:11:38,408 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 316 selfloop transitions, 6 changer transitions 0/338 dead transitions. [2023-08-31 22:11:38,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 338 transitions, 2518 flow [2023-08-31 22:11:38,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 22:11:38,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 22:11:38,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2149 transitions. [2023-08-31 22:11:38,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4756529437804338 [2023-08-31 22:11:38,411 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2149 transitions. [2023-08-31 22:11:38,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2149 transitions. [2023-08-31 22:11:38,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:11:38,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2149 transitions. [2023-08-31 22:11:38,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 358.1666666666667) internal successors, (2149), 6 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:38,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 753.0) internal successors, (5271), 7 states have internal predecessors, (5271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:38,416 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 753.0) internal successors, (5271), 7 states have internal predecessors, (5271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:38,416 INFO L175 Difference]: Start difference. First operand has 141 places, 122 transitions, 836 flow. Second operand 6 states and 2149 transitions. [2023-08-31 22:11:38,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 338 transitions, 2518 flow [2023-08-31 22:11:38,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 338 transitions, 2495 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:11:38,435 INFO L231 Difference]: Finished difference. Result has 149 places, 125 transitions, 870 flow [2023-08-31 22:11:38,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=870, PETRI_PLACES=149, PETRI_TRANSITIONS=125} [2023-08-31 22:11:38,436 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 10 predicate places. [2023-08-31 22:11:38,436 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 125 transitions, 870 flow [2023-08-31 22:11:38,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 325.2857142857143) internal successors, (2277), 7 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:38,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:11:38,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:11:38,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 22:11:38,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:11:38,648 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:11:38,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:11:38,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1551848466, now seen corresponding path program 1 times [2023-08-31 22:11:38,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:11:38,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895074947] [2023-08-31 22:11:38,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:11:38,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:11:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:11:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:11:39,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:11:39,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895074947] [2023-08-31 22:11:39,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895074947] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:11:39,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:11:39,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-31 22:11:39,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796484466] [2023-08-31 22:11:39,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:11:39,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 22:11:39,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:11:39,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 22:11:39,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-08-31 22:11:41,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 753 [2023-08-31 22:11:41,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 125 transitions, 870 flow. Second operand has 15 states, 15 states have (on average 273.93333333333334) internal successors, (4109), 15 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:41,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:11:41,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 753 [2023-08-31 22:11:41,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:11:42,595 INFO L130 PetriNetUnfolder]: 3870/7558 cut-off events. [2023-08-31 22:11:42,595 INFO L131 PetriNetUnfolder]: For 12158/12190 co-relation queries the response was YES. [2023-08-31 22:11:42,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23327 conditions, 7558 events. 3870/7558 cut-off events. For 12158/12190 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 47709 event pairs, 1991 based on Foata normal form. 23/7234 useless extension candidates. Maximal degree in co-relation 23282. Up to 3690 conditions per place. [2023-08-31 22:11:42,646 INFO L137 encePairwiseOnDemand]: 737/753 looper letters, 194 selfloop transitions, 46 changer transitions 0/247 dead transitions. [2023-08-31 22:11:42,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 247 transitions, 2097 flow [2023-08-31 22:11:42,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 22:11:42,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 22:11:42,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4236 transitions. [2023-08-31 22:11:42,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3750332005312085 [2023-08-31 22:11:42,651 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4236 transitions. [2023-08-31 22:11:42,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4236 transitions. [2023-08-31 22:11:42,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:11:42,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4236 transitions. [2023-08-31 22:11:42,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 282.4) internal successors, (4236), 15 states have internal predecessors, (4236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:42,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 753.0) internal successors, (12048), 16 states have internal predecessors, (12048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:42,664 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 753.0) internal successors, (12048), 16 states have internal predecessors, (12048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:42,664 INFO L175 Difference]: Start difference. First operand has 149 places, 125 transitions, 870 flow. Second operand 15 states and 4236 transitions. [2023-08-31 22:11:42,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 247 transitions, 2097 flow [2023-08-31 22:11:42,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 247 transitions, 1992 flow, removed 39 selfloop flow, removed 1 redundant places. [2023-08-31 22:11:42,698 INFO L231 Difference]: Finished difference. Result has 167 places, 131 transitions, 1029 flow [2023-08-31 22:11:42,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1029, PETRI_PLACES=167, PETRI_TRANSITIONS=131} [2023-08-31 22:11:42,699 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 28 predicate places. [2023-08-31 22:11:42,699 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 131 transitions, 1029 flow [2023-08-31 22:11:42,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 273.93333333333334) internal successors, (4109), 15 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:42,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:11:42,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:11:42,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-31 22:11:42,700 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:11:42,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:11:42,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1021400250, now seen corresponding path program 2 times [2023-08-31 22:11:42,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:11:42,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721182418] [2023-08-31 22:11:42,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:11:42,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:11:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:11:43,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:11:43,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:11:43,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721182418] [2023-08-31 22:11:43,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721182418] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:11:43,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:11:43,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-08-31 22:11:43,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784025832] [2023-08-31 22:11:43,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:11:43,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 22:11:43,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:11:43,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 22:11:43,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-08-31 22:11:45,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 753 [2023-08-31 22:11:45,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 131 transitions, 1029 flow. Second operand has 16 states, 16 states have (on average 260.8125) internal successors, (4173), 16 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:45,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:11:45,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 753 [2023-08-31 22:11:45,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:11:46,756 INFO L130 PetriNetUnfolder]: 3849/7565 cut-off events. [2023-08-31 22:11:46,757 INFO L131 PetriNetUnfolder]: For 11518/11550 co-relation queries the response was YES. [2023-08-31 22:11:46,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23497 conditions, 7565 events. 3849/7565 cut-off events. For 11518/11550 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 47769 event pairs, 1271 based on Foata normal form. 23/7245 useless extension candidates. Maximal degree in co-relation 23446. Up to 2764 conditions per place. [2023-08-31 22:11:46,798 INFO L137 encePairwiseOnDemand]: 737/753 looper letters, 193 selfloop transitions, 47 changer transitions 0/247 dead transitions. [2023-08-31 22:11:46,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 247 transitions, 2140 flow [2023-08-31 22:11:46,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 22:11:46,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 22:11:46,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4033 transitions. [2023-08-31 22:11:46,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3570606463036742 [2023-08-31 22:11:46,801 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4033 transitions. [2023-08-31 22:11:46,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4033 transitions. [2023-08-31 22:11:46,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:11:46,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4033 transitions. [2023-08-31 22:11:46,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 268.8666666666667) internal successors, (4033), 15 states have internal predecessors, (4033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:46,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 753.0) internal successors, (12048), 16 states have internal predecessors, (12048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:46,814 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 753.0) internal successors, (12048), 16 states have internal predecessors, (12048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:46,814 INFO L175 Difference]: Start difference. First operand has 167 places, 131 transitions, 1029 flow. Second operand 15 states and 4033 transitions. [2023-08-31 22:11:46,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 247 transitions, 2140 flow [2023-08-31 22:11:46,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 247 transitions, 2059 flow, removed 10 selfloop flow, removed 9 redundant places. [2023-08-31 22:11:46,849 INFO L231 Difference]: Finished difference. Result has 176 places, 136 transitions, 1120 flow [2023-08-31 22:11:46,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1120, PETRI_PLACES=176, PETRI_TRANSITIONS=136} [2023-08-31 22:11:46,849 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 37 predicate places. [2023-08-31 22:11:46,850 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 136 transitions, 1120 flow [2023-08-31 22:11:46,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 260.8125) internal successors, (4173), 16 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:46,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:11:46,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:11:46,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-31 22:11:46,851 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:11:46,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:11:46,851 INFO L85 PathProgramCache]: Analyzing trace with hash 634248710, now seen corresponding path program 1 times [2023-08-31 22:11:46,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:11:46,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928746580] [2023-08-31 22:11:46,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:11:46,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:11:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:11:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:11:48,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:11:48,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928746580] [2023-08-31 22:11:48,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928746580] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:11:48,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:11:48,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-31 22:11:48,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557853637] [2023-08-31 22:11:48,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:11:48,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 22:11:48,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:11:48,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 22:11:48,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-08-31 22:11:57,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 753 [2023-08-31 22:11:57,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 136 transitions, 1120 flow. Second operand has 16 states, 16 states have (on average 261.875) internal successors, (4190), 16 states have internal predecessors, (4190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:11:57,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:11:57,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 753 [2023-08-31 22:11:57,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:12:00,211 INFO L130 PetriNetUnfolder]: 5003/9805 cut-off events. [2023-08-31 22:12:00,211 INFO L131 PetriNetUnfolder]: For 16636/16676 co-relation queries the response was YES. [2023-08-31 22:12:00,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30841 conditions, 9805 events. 5003/9805 cut-off events. For 16636/16676 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 65457 event pairs, 2778 based on Foata normal form. 0/9431 useless extension candidates. Maximal degree in co-relation 30787. Up to 5662 conditions per place. [2023-08-31 22:12:00,268 INFO L137 encePairwiseOnDemand]: 735/753 looper letters, 237 selfloop transitions, 42 changer transitions 0/286 dead transitions. [2023-08-31 22:12:00,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 286 transitions, 2567 flow [2023-08-31 22:12:00,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 22:12:00,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 22:12:00,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3816 transitions. [2023-08-31 22:12:00,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619806488332385 [2023-08-31 22:12:00,272 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3816 transitions. [2023-08-31 22:12:00,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3816 transitions. [2023-08-31 22:12:00,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:12:00,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3816 transitions. [2023-08-31 22:12:00,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 272.57142857142856) internal successors, (3816), 14 states have internal predecessors, (3816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:12:00,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 753.0) internal successors, (11295), 15 states have internal predecessors, (11295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:12:00,284 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 753.0) internal successors, (11295), 15 states have internal predecessors, (11295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:12:00,284 INFO L175 Difference]: Start difference. First operand has 176 places, 136 transitions, 1120 flow. Second operand 14 states and 3816 transitions. [2023-08-31 22:12:00,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 286 transitions, 2567 flow [2023-08-31 22:12:00,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 286 transitions, 2488 flow, removed 5 selfloop flow, removed 9 redundant places. [2023-08-31 22:12:00,334 INFO L231 Difference]: Finished difference. Result has 188 places, 146 transitions, 1334 flow [2023-08-31 22:12:00,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=1054, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1334, PETRI_PLACES=188, PETRI_TRANSITIONS=146} [2023-08-31 22:12:00,335 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 49 predicate places. [2023-08-31 22:12:00,335 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 146 transitions, 1334 flow [2023-08-31 22:12:00,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 261.875) internal successors, (4190), 16 states have internal predecessors, (4190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:12:00,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:12:00,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:12:00,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-31 22:12:00,336 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:12:00,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:12:00,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1261413180, now seen corresponding path program 2 times [2023-08-31 22:12:00,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:12:00,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884030799] [2023-08-31 22:12:00,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:12:00,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:12:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15