./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-ext/04_incdec_cas.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread-ext/04_incdec_cas.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 a025fe4ca65874bde9a09e6a2d9fa9eceda581ed1bc5b23e0ff5285795ed115b --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 19:50:34,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 19:50:34,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 19:50:34,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 19:50:34,044 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 19:50:34,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 19:50:34,050 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 19:50:34,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 19:50:34,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 19:50:34,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 19:50:34,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 19:50:34,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 19:50:34,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 19:50:34,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 19:50:34,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 19:50:34,064 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 19:50:34,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 19:50:34,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 19:50:34,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 19:50:34,070 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 19:50:34,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 19:50:34,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 19:50:34,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 19:50:34,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 19:50:34,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 19:50:34,080 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 19:50:34,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 19:50:34,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 19:50:34,082 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 19:50:34,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 19:50:34,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 19:50:34,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 19:50:34,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 19:50:34,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 19:50:34,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 19:50:34,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 19:50:34,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 19:50:34,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 19:50:34,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 19:50:34,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 19:50:34,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 19:50:34,093 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 19:50:34,117 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 19:50:34,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 19:50:34,118 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 19:50:34,118 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 19:50:34,119 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 19:50:34,119 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 19:50:34,119 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 19:50:34,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 19:50:34,119 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 19:50:34,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 19:50:34,120 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 19:50:34,120 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 19:50:34,121 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 19:50:34,121 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 19:50:34,121 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 19:50:34,121 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 19:50:34,121 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 19:50:34,121 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 19:50:34,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 19:50:34,122 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 19:50:34,122 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 19:50:34,125 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 19:50:34,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 19:50:34,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 19:50:34,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 19:50:34,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:50:34,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 19:50:34,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 19:50:34,130 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 19:50:34,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 19:50:34,131 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 19:50:34,131 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 19:50:34,131 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 19:50:34,131 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 19:50:34,131 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a025fe4ca65874bde9a09e6a2d9fa9eceda581ed1bc5b23e0ff5285795ed115b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 19:50:34,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 19:50:34,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 19:50:34,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 19:50:34,364 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 19:50:34,364 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 19:50:34,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/04_incdec_cas.i [2023-08-29 19:50:35,331 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 19:50:35,526 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 19:50:35,527 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/04_incdec_cas.i [2023-08-29 19:50:35,535 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41dbbd25e/cd2d807c02424afd8e995f99071a0113/FLAG1ae4f3b12 [2023-08-29 19:50:35,549 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41dbbd25e/cd2d807c02424afd8e995f99071a0113 [2023-08-29 19:50:35,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 19:50:35,552 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 19:50:35,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 19:50:35,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 19:50:35,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 19:50:35,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:50:35" (1/1) ... [2023-08-29 19:50:35,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eb9bd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:50:35, skipping insertion in model container [2023-08-29 19:50:35,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:50:35" (1/1) ... [2023-08-29 19:50:35,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 19:50:35,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 19:50:35,823 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-ext/04_incdec_cas.i[30285,30298] [2023-08-29 19:50:35,835 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-ext/04_incdec_cas.i[30729,30742] [2023-08-29 19:50:35,843 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:50:35,849 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 19:50:35,873 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-ext/04_incdec_cas.i[30285,30298] [2023-08-29 19:50:35,878 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-ext/04_incdec_cas.i[30729,30742] [2023-08-29 19:50:35,884 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:50:35,914 INFO L208 MainTranslator]: Completed translation [2023-08-29 19:50:35,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:50:35 WrapperNode [2023-08-29 19:50:35,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 19:50:35,915 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 19:50:35,915 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 19:50:35,916 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 19:50:35,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:50:35" (1/1) ... [2023-08-29 19:50:35,930 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:50:35" (1/1) ... [2023-08-29 19:50:35,952 INFO L138 Inliner]: procedures = 172, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 159 [2023-08-29 19:50:35,953 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 19:50:35,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 19:50:35,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 19:50:35,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 19:50:35,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:50:35" (1/1) ... [2023-08-29 19:50:35,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:50:35" (1/1) ... [2023-08-29 19:50:35,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:50:35" (1/1) ... [2023-08-29 19:50:35,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:50:35" (1/1) ... [2023-08-29 19:50:35,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:50:35" (1/1) ... [2023-08-29 19:50:35,972 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:50:35" (1/1) ... [2023-08-29 19:50:35,974 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:50:35" (1/1) ... [2023-08-29 19:50:35,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:50:35" (1/1) ... [2023-08-29 19:50:35,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 19:50:35,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 19:50:35,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 19:50:35,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 19:50:35,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:50:35" (1/1) ... [2023-08-29 19:50:35,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:50:35,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:50:36,021 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 19:50:36,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 19:50:36,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 19:50:36,046 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-29 19:50:36,047 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-29 19:50:36,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 19:50:36,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 19:50:36,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 19:50:36,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 19:50:36,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 19:50:36,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 19:50:36,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 19:50:36,048 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 19:50:36,184 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 19:50:36,185 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 19:50:36,489 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 19:50:36,701 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 19:50:36,701 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-29 19:50:36,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:50:36 BoogieIcfgContainer [2023-08-29 19:50:36,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 19:50:36,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 19:50:36,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 19:50:36,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 19:50:36,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 07:50:35" (1/3) ... [2023-08-29 19:50:36,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a2f8eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:50:36, skipping insertion in model container [2023-08-29 19:50:36,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:50:35" (2/3) ... [2023-08-29 19:50:36,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a2f8eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:50:36, skipping insertion in model container [2023-08-29 19:50:36,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:50:36" (3/3) ... [2023-08-29 19:50:36,709 INFO L112 eAbstractionObserver]: Analyzing ICFG 04_incdec_cas.i [2023-08-29 19:50:36,720 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 19:50:36,721 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2023-08-29 19:50:36,721 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 19:50:36,820 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 19:50:36,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 140 transitions, 285 flow [2023-08-29 19:50:36,909 INFO L130 PetriNetUnfolder]: 9/155 cut-off events. [2023-08-29 19:50:36,910 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:50:36,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 155 events. 9/155 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 540 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 118. Up to 4 conditions per place. [2023-08-29 19:50:36,914 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 140 transitions, 285 flow [2023-08-29 19:50:36,920 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 140 transitions, 285 flow [2023-08-29 19:50:36,923 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:50:36,932 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 140 transitions, 285 flow [2023-08-29 19:50:36,935 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 140 transitions, 285 flow [2023-08-29 19:50:36,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 140 transitions, 285 flow [2023-08-29 19:50:36,972 INFO L130 PetriNetUnfolder]: 9/155 cut-off events. [2023-08-29 19:50:36,972 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:50:36,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 155 events. 9/155 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 540 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 118. Up to 4 conditions per place. [2023-08-29 19:50:36,976 INFO L119 LiptonReduction]: Number of co-enabled transitions 3636 [2023-08-29 19:50:45,483 INFO L134 LiptonReduction]: Checked pairs total: 8180 [2023-08-29 19:50:45,483 INFO L136 LiptonReduction]: Total number of compositions: 124 [2023-08-29 19:50:45,492 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:50:45,496 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;@5b970bf6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:50:45,496 INFO L358 AbstractCegarLoop]: Starting to check reachability of 79 error locations. [2023-08-29 19:50:45,498 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 19:50:45,498 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:50:45,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:50:45,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:50:45,499 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-29 19:50:45,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:50:45,502 INFO L85 PathProgramCache]: Analyzing trace with hash 25748, now seen corresponding path program 1 times [2023-08-29 19:50:45,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:50:45,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767790864] [2023-08-29 19:50:45,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:50:45,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:50:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:50:45,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:50:45,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:50:45,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767790864] [2023-08-29 19:50:45,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767790864] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:50:45,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:50:45,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:50:45,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725795293] [2023-08-29 19:50:45,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:50:45,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:50:45,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:50:45,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:50:45,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:50:45,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 264 [2023-08-29 19:50:45,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 67 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:45,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:50:45,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 264 [2023-08-29 19:50:45,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:50:45,971 INFO L130 PetriNetUnfolder]: 125/297 cut-off events. [2023-08-29 19:50:45,971 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:50:45,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 575 conditions, 297 events. 125/297 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 1569 event pairs, 105 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 560. Up to 272 conditions per place. [2023-08-29 19:50:45,976 INFO L137 encePairwiseOnDemand]: 251/264 looper letters, 44 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-08-29 19:50:45,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 199 flow [2023-08-29 19:50:45,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:50:45,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:50:45,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2023-08-29 19:50:45,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2023-08-29 19:50:45,996 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2023-08-29 19:50:45,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2023-08-29 19:50:45,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:50:46,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2023-08-29 19:50:46,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:46,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:46,008 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:46,009 INFO L175 Difference]: Start difference. First operand has 63 places, 67 transitions, 139 flow. Second operand 3 states and 348 transitions. [2023-08-29 19:50:46,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 199 flow [2023-08-29 19:50:46,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 52 transitions, 199 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:50:46,013 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 111 flow [2023-08-29 19:50:46,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2023-08-29 19:50:46,017 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -11 predicate places. [2023-08-29 19:50:46,017 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 111 flow [2023-08-29 19:50:46,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:46,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:50:46,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:50:46,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 19:50:46,018 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-29 19:50:46,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:50:46,038 INFO L85 PathProgramCache]: Analyzing trace with hash 25747, now seen corresponding path program 1 times [2023-08-29 19:50:46,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:50:46,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23638197] [2023-08-29 19:50:46,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:50:46,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:50:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:50:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:50:46,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:50:46,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23638197] [2023-08-29 19:50:46,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23638197] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:50:46,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:50:46,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:50:46,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494753004] [2023-08-29 19:50:46,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:50:46,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:50:46,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:50:46,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:50:46,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:50:46,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 264 [2023-08-29 19:50:46,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:46,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:50:46,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 264 [2023-08-29 19:50:46,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:50:46,223 INFO L130 PetriNetUnfolder]: 84/216 cut-off events. [2023-08-29 19:50:46,223 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:50:46,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 216 events. 84/216 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1093 event pairs, 68 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 414. Up to 182 conditions per place. [2023-08-29 19:50:46,224 INFO L137 encePairwiseOnDemand]: 257/264 looper letters, 41 selfloop transitions, 5 changer transitions 1/54 dead transitions. [2023-08-29 19:50:46,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 54 transitions, 209 flow [2023-08-29 19:50:46,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:50:46,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:50:46,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2023-08-29 19:50:46,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053030303030303 [2023-08-29 19:50:46,226 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2023-08-29 19:50:46,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2023-08-29 19:50:46,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:50:46,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2023-08-29 19:50:46,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:46,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:46,229 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:46,229 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 111 flow. Second operand 3 states and 321 transitions. [2023-08-29 19:50:46,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 54 transitions, 209 flow [2023-08-29 19:50:46,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 54 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:50:46,231 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 134 flow [2023-08-29 19:50:46,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2023-08-29 19:50:46,231 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -8 predicate places. [2023-08-29 19:50:46,231 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 134 flow [2023-08-29 19:50:46,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:46,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:50:46,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:50:46,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 19:50:46,232 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-29 19:50:46,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:50:46,233 INFO L85 PathProgramCache]: Analyzing trace with hash 767649201, now seen corresponding path program 1 times [2023-08-29 19:50:46,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:50:46,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554713890] [2023-08-29 19:50:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:50:46,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:50:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:50:46,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:50:46,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:50:46,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554713890] [2023-08-29 19:50:46,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554713890] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:50:46,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:50:46,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:50:46,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872577086] [2023-08-29 19:50:46,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:50:46,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:50:46,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:50:46,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:50:46,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:50:46,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 264 [2023-08-29 19:50:46,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:46,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:50:46,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 264 [2023-08-29 19:50:46,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:50:46,469 INFO L130 PetriNetUnfolder]: 76/188 cut-off events. [2023-08-29 19:50:46,469 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2023-08-29 19:50:46,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431 conditions, 188 events. 76/188 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 883 event pairs, 60 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 421. Up to 161 conditions per place. [2023-08-29 19:50:46,470 INFO L137 encePairwiseOnDemand]: 253/264 looper letters, 37 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2023-08-29 19:50:46,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 47 transitions, 208 flow [2023-08-29 19:50:46,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:50:46,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:50:46,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 309 transitions. [2023-08-29 19:50:46,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39015151515151514 [2023-08-29 19:50:46,472 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 309 transitions. [2023-08-29 19:50:46,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 309 transitions. [2023-08-29 19:50:46,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:50:46,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 309 transitions. [2023-08-29 19:50:46,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:46,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:46,474 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:46,475 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 134 flow. Second operand 3 states and 309 transitions. [2023-08-29 19:50:46,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 47 transitions, 208 flow [2023-08-29 19:50:46,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:50:46,477 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 122 flow [2023-08-29 19:50:46,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-08-29 19:50:46,478 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -14 predicate places. [2023-08-29 19:50:46,478 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 122 flow [2023-08-29 19:50:46,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:46,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:50:46,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:50:46,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 19:50:46,479 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-29 19:50:46,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:50:46,479 INFO L85 PathProgramCache]: Analyzing trace with hash 767649202, now seen corresponding path program 1 times [2023-08-29 19:50:46,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:50:46,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521426336] [2023-08-29 19:50:46,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:50:46,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:50:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:50:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:50:46,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:50:46,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521426336] [2023-08-29 19:50:46,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521426336] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:50:46,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:50:46,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:50:46,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051300362] [2023-08-29 19:50:46,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:50:46,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:50:46,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:50:46,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:50:46,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:50:46,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 264 [2023-08-29 19:50:46,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 96.0) internal successors, (480), 5 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:46,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:50:46,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 264 [2023-08-29 19:50:46,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:50:46,742 INFO L130 PetriNetUnfolder]: 72/172 cut-off events. [2023-08-29 19:50:46,742 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2023-08-29 19:50:46,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 172 events. 72/172 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 762 event pairs, 57 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 393. Up to 165 conditions per place. [2023-08-29 19:50:46,743 INFO L137 encePairwiseOnDemand]: 259/264 looper letters, 38 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-08-29 19:50:46,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 42 transitions, 192 flow [2023-08-29 19:50:46,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:50:46,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:50:46,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 328 transitions. [2023-08-29 19:50:46,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2023-08-29 19:50:46,747 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 328 transitions. [2023-08-29 19:50:46,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 328 transitions. [2023-08-29 19:50:46,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:50:46,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 328 transitions. [2023-08-29 19:50:46,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:46,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:46,750 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:46,750 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 122 flow. Second operand 3 states and 328 transitions. [2023-08-29 19:50:46,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 42 transitions, 192 flow [2023-08-29 19:50:46,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 42 transitions, 182 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:50:46,752 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 106 flow [2023-08-29 19:50:46,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-08-29 19:50:46,754 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -18 predicate places. [2023-08-29 19:50:46,754 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 106 flow [2023-08-29 19:50:46,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 96.0) internal successors, (480), 5 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:46,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:50:46,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:50:46,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 19:50:46,755 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-29 19:50:46,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:50:46,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1972674773, now seen corresponding path program 1 times [2023-08-29 19:50:46,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:50:46,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174335781] [2023-08-29 19:50:46,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:50:46,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:50:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:50:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:50:46,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:50:46,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174335781] [2023-08-29 19:50:46,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174335781] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:50:46,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:50:46,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:50:46,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389683296] [2023-08-29 19:50:46,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:50:46,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:50:46,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:50:46,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:50:46,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:50:46,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 264 [2023-08-29 19:50:46,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:46,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:50:46,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 264 [2023-08-29 19:50:46,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:50:46,908 INFO L130 PetriNetUnfolder]: 68/159 cut-off events. [2023-08-29 19:50:46,908 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2023-08-29 19:50:46,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 159 events. 68/159 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 665 event pairs, 29 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 356. Up to 93 conditions per place. [2023-08-29 19:50:46,909 INFO L137 encePairwiseOnDemand]: 258/264 looper letters, 36 selfloop transitions, 3 changer transitions 0/41 dead transitions. [2023-08-29 19:50:46,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 184 flow [2023-08-29 19:50:46,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:50:46,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:50:46,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 312 transitions. [2023-08-29 19:50:46,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2023-08-29 19:50:46,911 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 312 transitions. [2023-08-29 19:50:46,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 312 transitions. [2023-08-29 19:50:46,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:50:46,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 312 transitions. [2023-08-29 19:50:46,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:46,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:46,913 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:46,913 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 106 flow. Second operand 3 states and 312 transitions. [2023-08-29 19:50:46,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 184 flow [2023-08-29 19:50:46,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 41 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:50:46,914 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 105 flow [2023-08-29 19:50:46,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2023-08-29 19:50:46,915 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -20 predicate places. [2023-08-29 19:50:46,915 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 105 flow [2023-08-29 19:50:46,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:46,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:50:46,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:50:46,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 19:50:46,916 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-29 19:50:46,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:50:46,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1972674770, now seen corresponding path program 1 times [2023-08-29 19:50:46,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:50:46,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285753110] [2023-08-29 19:50:46,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:50:46,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:50:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:50:46,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:50:46,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:50:46,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285753110] [2023-08-29 19:50:46,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285753110] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:50:46,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:50:46,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:50:46,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103132690] [2023-08-29 19:50:46,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:50:46,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:50:46,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:50:46,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:50:46,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:50:47,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 264 [2023-08-29 19:50:47,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 105 flow. Second operand has 5 states, 5 states have (on average 92.2) internal successors, (461), 5 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:50:47,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 264 [2023-08-29 19:50:47,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:50:47,138 INFO L130 PetriNetUnfolder]: 59/146 cut-off events. [2023-08-29 19:50:47,138 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-08-29 19:50:47,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 146 events. 59/146 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 572 event pairs, 15 based on Foata normal form. 3/101 useless extension candidates. Maximal degree in co-relation 334. Up to 88 conditions per place. [2023-08-29 19:50:47,139 INFO L137 encePairwiseOnDemand]: 254/264 looper letters, 34 selfloop transitions, 5 changer transitions 1/42 dead transitions. [2023-08-29 19:50:47,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 42 transitions, 197 flow [2023-08-29 19:50:47,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:50:47,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:50:47,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 409 transitions. [2023-08-29 19:50:47,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3873106060606061 [2023-08-29 19:50:47,140 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 409 transitions. [2023-08-29 19:50:47,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 409 transitions. [2023-08-29 19:50:47,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:50:47,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 409 transitions. [2023-08-29 19:50:47,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 264.0) internal successors, (1320), 5 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,143 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 264.0) internal successors, (1320), 5 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,143 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 105 flow. Second operand 4 states and 409 transitions. [2023-08-29 19:50:47,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 42 transitions, 197 flow [2023-08-29 19:50:47,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 42 transitions, 193 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:50:47,144 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 100 flow [2023-08-29 19:50:47,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-29 19:50:47,145 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -28 predicate places. [2023-08-29 19:50:47,145 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 100 flow [2023-08-29 19:50:47,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 92.2) internal successors, (461), 5 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:50:47,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:50:47,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 19:50:47,146 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-29 19:50:47,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:50:47,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1972675129, now seen corresponding path program 1 times [2023-08-29 19:50:47,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:50:47,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037663678] [2023-08-29 19:50:47,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:50:47,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:50:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:50:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:50:47,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:50:47,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037663678] [2023-08-29 19:50:47,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037663678] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:50:47,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:50:47,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:50:47,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959857787] [2023-08-29 19:50:47,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:50:47,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:50:47,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:50:47,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:50:47,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:50:47,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 264 [2023-08-29 19:50:47,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:50:47,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 264 [2023-08-29 19:50:47,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:50:47,320 INFO L130 PetriNetUnfolder]: 55/136 cut-off events. [2023-08-29 19:50:47,321 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-29 19:50:47,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 136 events. 55/136 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 526 event pairs, 40 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 339. Up to 114 conditions per place. [2023-08-29 19:50:47,321 INFO L137 encePairwiseOnDemand]: 259/264 looper letters, 24 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2023-08-29 19:50:47,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 156 flow [2023-08-29 19:50:47,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:50:47,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:50:47,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2023-08-29 19:50:47,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3813131313131313 [2023-08-29 19:50:47,323 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 302 transitions. [2023-08-29 19:50:47,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 302 transitions. [2023-08-29 19:50:47,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:50:47,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 302 transitions. [2023-08-29 19:50:47,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,325 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,325 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 100 flow. Second operand 3 states and 302 transitions. [2023-08-29 19:50:47,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 156 flow [2023-08-29 19:50:47,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:50:47,326 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 102 flow [2023-08-29 19:50:47,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-08-29 19:50:47,327 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -28 predicate places. [2023-08-29 19:50:47,327 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 102 flow [2023-08-29 19:50:47,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:50:47,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:50:47,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 19:50:47,327 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-29 19:50:47,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:50:47,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1972675137, now seen corresponding path program 1 times [2023-08-29 19:50:47,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:50:47,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195331223] [2023-08-29 19:50:47,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:50:47,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:50:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:50:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:50:47,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:50:47,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195331223] [2023-08-29 19:50:47,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195331223] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:50:47,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:50:47,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:50:47,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012639066] [2023-08-29 19:50:47,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:50:47,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:50:47,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:50:47,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:50:47,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:50:47,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 264 [2023-08-29 19:50:47,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:50:47,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 264 [2023-08-29 19:50:47,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:50:47,417 INFO L130 PetriNetUnfolder]: 46/115 cut-off events. [2023-08-29 19:50:47,417 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-08-29 19:50:47,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 115 events. 46/115 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 406 event pairs, 7 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 294. Up to 81 conditions per place. [2023-08-29 19:50:47,418 INFO L137 encePairwiseOnDemand]: 258/264 looper letters, 23 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2023-08-29 19:50:47,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 27 transitions, 148 flow [2023-08-29 19:50:47,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:50:47,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:50:47,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 297 transitions. [2023-08-29 19:50:47,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2023-08-29 19:50:47,419 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 297 transitions. [2023-08-29 19:50:47,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 297 transitions. [2023-08-29 19:50:47,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:50:47,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 297 transitions. [2023-08-29 19:50:47,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,422 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,422 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 102 flow. Second operand 3 states and 297 transitions. [2023-08-29 19:50:47,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 27 transitions, 148 flow [2023-08-29 19:50:47,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 27 transitions, 140 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:50:47,423 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 88 flow [2023-08-29 19:50:47,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2023-08-29 19:50:47,423 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -31 predicate places. [2023-08-29 19:50:47,423 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 88 flow [2023-08-29 19:50:47,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:50:47,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:50:47,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 19:50:47,424 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-29 19:50:47,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:50:47,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1972675136, now seen corresponding path program 1 times [2023-08-29 19:50:47,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:50:47,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302321430] [2023-08-29 19:50:47,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:50:47,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:50:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:50:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:50:47,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:50:47,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302321430] [2023-08-29 19:50:47,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302321430] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:50:47,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:50:47,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:50:47,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280896752] [2023-08-29 19:50:47,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:50:47,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:50:47,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:50:47,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:50:47,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:50:47,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 264 [2023-08-29 19:50:47,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:50:47,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 264 [2023-08-29 19:50:47,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:50:47,537 INFO L130 PetriNetUnfolder]: 37/97 cut-off events. [2023-08-29 19:50:47,537 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-29 19:50:47,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 97 events. 37/97 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 328 event pairs, 7 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 249. Up to 63 conditions per place. [2023-08-29 19:50:47,538 INFO L137 encePairwiseOnDemand]: 259/264 looper letters, 20 selfloop transitions, 3 changer transitions 0/24 dead transitions. [2023-08-29 19:50:47,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 24 transitions, 130 flow [2023-08-29 19:50:47,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:50:47,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:50:47,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 312 transitions. [2023-08-29 19:50:47,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2023-08-29 19:50:47,539 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 312 transitions. [2023-08-29 19:50:47,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 312 transitions. [2023-08-29 19:50:47,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:50:47,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 312 transitions. [2023-08-29 19:50:47,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,541 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,541 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 88 flow. Second operand 3 states and 312 transitions. [2023-08-29 19:50:47,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 24 transitions, 130 flow [2023-08-29 19:50:47,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 24 transitions, 124 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:50:47,543 INFO L231 Difference]: Finished difference. Result has 30 places, 22 transitions, 78 flow [2023-08-29 19:50:47,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=30, PETRI_TRANSITIONS=22} [2023-08-29 19:50:47,544 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -33 predicate places. [2023-08-29 19:50:47,544 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 22 transitions, 78 flow [2023-08-29 19:50:47,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:50:47,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:50:47,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 19:50:47,544 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-29 19:50:47,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:50:47,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1972675128, now seen corresponding path program 1 times [2023-08-29 19:50:47,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:50:47,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115215883] [2023-08-29 19:50:47,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:50:47,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:50:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:50:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:50:47,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:50:47,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115215883] [2023-08-29 19:50:47,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115215883] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:50:47,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:50:47,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:50:47,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704033578] [2023-08-29 19:50:47,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:50:47,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:50:47,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:50:47,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:50:47,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:50:47,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 264 [2023-08-29 19:50:47,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:50:47,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 264 [2023-08-29 19:50:47,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:50:47,736 INFO L130 PetriNetUnfolder]: 33/87 cut-off events. [2023-08-29 19:50:47,736 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-29 19:50:47,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 87 events. 33/87 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 280 event pairs, 27 based on Foata normal form. 6/81 useless extension candidates. Maximal degree in co-relation 227. Up to 86 conditions per place. [2023-08-29 19:50:47,745 INFO L137 encePairwiseOnDemand]: 262/264 looper letters, 19 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-08-29 19:50:47,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 21 transitions, 116 flow [2023-08-29 19:50:47,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:50:47,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:50:47,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 314 transitions. [2023-08-29 19:50:47,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39646464646464646 [2023-08-29 19:50:47,747 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 314 transitions. [2023-08-29 19:50:47,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 314 transitions. [2023-08-29 19:50:47,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:50:47,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 314 transitions. [2023-08-29 19:50:47,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,749 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,749 INFO L175 Difference]: Start difference. First operand has 30 places, 22 transitions, 78 flow. Second operand 3 states and 314 transitions. [2023-08-29 19:50:47,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 21 transitions, 116 flow [2023-08-29 19:50:47,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 21 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:50:47,750 INFO L231 Difference]: Finished difference. Result has 29 places, 21 transitions, 72 flow [2023-08-29 19:50:47,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=29, PETRI_TRANSITIONS=21} [2023-08-29 19:50:47,750 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -34 predicate places. [2023-08-29 19:50:47,751 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 21 transitions, 72 flow [2023-08-29 19:50:47,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:50:47,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:50:47,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 19:50:47,751 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-29 19:50:47,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:50:47,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1744623411, now seen corresponding path program 1 times [2023-08-29 19:50:47,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:50:47,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511980556] [2023-08-29 19:50:47,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:50:47,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:50:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:50:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:50:47,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:50:47,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511980556] [2023-08-29 19:50:47,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511980556] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:50:47,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:50:47,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:50:47,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829788218] [2023-08-29 19:50:47,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:50:47,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:50:47,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:50:47,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:50:47,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:50:47,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 264 [2023-08-29 19:50:47,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 21 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:50:47,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 264 [2023-08-29 19:50:47,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:50:47,866 INFO L130 PetriNetUnfolder]: 33/85 cut-off events. [2023-08-29 19:50:47,866 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 19:50:47,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 85 events. 33/85 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 271 event pairs, 6 based on Foata normal form. 2/72 useless extension candidates. Maximal degree in co-relation 209. Up to 53 conditions per place. [2023-08-29 19:50:47,866 INFO L137 encePairwiseOnDemand]: 258/264 looper letters, 17 selfloop transitions, 3 changer transitions 3/24 dead transitions. [2023-08-29 19:50:47,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 24 transitions, 126 flow [2023-08-29 19:50:47,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:50:47,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:50:47,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 367 transitions. [2023-08-29 19:50:47,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3475378787878788 [2023-08-29 19:50:47,868 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 367 transitions. [2023-08-29 19:50:47,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 367 transitions. [2023-08-29 19:50:47,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:50:47,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 367 transitions. [2023-08-29 19:50:47,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 91.75) internal successors, (367), 4 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 264.0) internal successors, (1320), 5 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,870 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 264.0) internal successors, (1320), 5 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,871 INFO L175 Difference]: Start difference. First operand has 29 places, 21 transitions, 72 flow. Second operand 4 states and 367 transitions. [2023-08-29 19:50:47,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 24 transitions, 126 flow [2023-08-29 19:50:47,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 24 transitions, 125 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:50:47,871 INFO L231 Difference]: Finished difference. Result has 32 places, 18 transitions, 72 flow [2023-08-29 19:50:47,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=32, PETRI_TRANSITIONS=18} [2023-08-29 19:50:47,872 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -31 predicate places. [2023-08-29 19:50:47,872 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 18 transitions, 72 flow [2023-08-29 19:50:47,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:50:47,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:50:47,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 19:50:47,873 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-29 19:50:47,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:50:47,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1744611972, now seen corresponding path program 1 times [2023-08-29 19:50:47,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:50:47,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714273449] [2023-08-29 19:50:47,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:50:47,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:50:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:50:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:50:47,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:50:47,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714273449] [2023-08-29 19:50:47,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714273449] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:50:47,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:50:47,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:50:47,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990594352] [2023-08-29 19:50:47,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:50:47,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:50:47,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:50:47,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:50:47,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:50:47,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 264 [2023-08-29 19:50:47,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 18 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:47,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:50:47,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 264 [2023-08-29 19:50:47,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:50:48,002 INFO L130 PetriNetUnfolder]: 26/68 cut-off events. [2023-08-29 19:50:48,003 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 19:50:48,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 68 events. 26/68 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 193 event pairs, 19 based on Foata normal form. 1/60 useless extension candidates. Maximal degree in co-relation 176. Up to 57 conditions per place. [2023-08-29 19:50:48,003 INFO L137 encePairwiseOnDemand]: 260/264 looper letters, 12 selfloop transitions, 1 changer transitions 5/19 dead transitions. [2023-08-29 19:50:48,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 19 transitions, 108 flow [2023-08-29 19:50:48,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:50:48,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:50:48,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 362 transitions. [2023-08-29 19:50:48,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3428030303030303 [2023-08-29 19:50:48,005 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 362 transitions. [2023-08-29 19:50:48,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 362 transitions. [2023-08-29 19:50:48,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:50:48,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 362 transitions. [2023-08-29 19:50:48,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:48,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 264.0) internal successors, (1320), 5 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:48,007 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 264.0) internal successors, (1320), 5 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:48,007 INFO L175 Difference]: Start difference. First operand has 32 places, 18 transitions, 72 flow. Second operand 4 states and 362 transitions. [2023-08-29 19:50:48,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 19 transitions, 108 flow [2023-08-29 19:50:48,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 19 transitions, 98 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 19:50:48,008 INFO L231 Difference]: Finished difference. Result has 29 places, 14 transitions, 48 flow [2023-08-29 19:50:48,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=29, PETRI_TRANSITIONS=14} [2023-08-29 19:50:48,009 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -34 predicate places. [2023-08-29 19:50:48,009 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 14 transitions, 48 flow [2023-08-29 19:50:48,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:48,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:50:48,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:50:48,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 19:50:48,009 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-29 19:50:48,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:50:48,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1660202197, now seen corresponding path program 1 times [2023-08-29 19:50:48,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:50:48,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700074753] [2023-08-29 19:50:48,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:50:48,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:50:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:50:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:50:48,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:50:48,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700074753] [2023-08-29 19:50:48,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700074753] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:50:48,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:50:48,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 19:50:48,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417760760] [2023-08-29 19:50:48,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:50:48,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:50:48,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:50:48,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:50:48,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:50:48,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 264 [2023-08-29 19:50:48,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 14 transitions, 48 flow. Second operand has 7 states, 7 states have (on average 85.14285714285714) internal successors, (596), 7 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:48,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:50:48,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 264 [2023-08-29 19:50:48,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:50:48,328 INFO L130 PetriNetUnfolder]: 19/49 cut-off events. [2023-08-29 19:50:48,328 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-29 19:50:48,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 49 events. 19/49 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 105 event pairs, 16 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 117. Up to 48 conditions per place. [2023-08-29 19:50:48,329 INFO L137 encePairwiseOnDemand]: 262/264 looper letters, 11 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2023-08-29 19:50:48,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 13 transitions, 70 flow [2023-08-29 19:50:48,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:50:48,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:50:48,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 264 transitions. [2023-08-29 19:50:48,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-08-29 19:50:48,330 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 264 transitions. [2023-08-29 19:50:48,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 264 transitions. [2023-08-29 19:50:48,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:50:48,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 264 transitions. [2023-08-29 19:50:48,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:48,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:48,333 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:48,333 INFO L175 Difference]: Start difference. First operand has 29 places, 14 transitions, 48 flow. Second operand 3 states and 264 transitions. [2023-08-29 19:50:48,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 13 transitions, 70 flow [2023-08-29 19:50:48,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 13 transitions, 66 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 19:50:48,333 INFO L231 Difference]: Finished difference. Result has 23 places, 13 transitions, 44 flow [2023-08-29 19:50:48,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=13} [2023-08-29 19:50:48,334 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -40 predicate places. [2023-08-29 19:50:48,334 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 13 transitions, 44 flow [2023-08-29 19:50:48,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 85.14285714285714) internal successors, (596), 7 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:48,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:50:48,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:50:48,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 19:50:48,335 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-29 19:50:48,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:50:48,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1660202196, now seen corresponding path program 1 times [2023-08-29 19:50:48,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:50:48,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448980902] [2023-08-29 19:50:48,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:50:48,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:50:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:50:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:50:48,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:50:48,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448980902] [2023-08-29 19:50:48,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448980902] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:50:48,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:50:48,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 19:50:48,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450265336] [2023-08-29 19:50:48,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:50:48,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:50:48,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:50:48,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:50:48,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:50:48,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 264 [2023-08-29 19:50:48,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 13 transitions, 44 flow. Second operand has 6 states, 6 states have (on average 93.33333333333333) internal successors, (560), 6 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:48,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:50:48,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 264 [2023-08-29 19:50:48,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:50:48,679 INFO L130 PetriNetUnfolder]: 17/44 cut-off events. [2023-08-29 19:50:48,679 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:50:48,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 44 events. 17/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 84 event pairs, 14 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 97. Up to 43 conditions per place. [2023-08-29 19:50:48,679 INFO L137 encePairwiseOnDemand]: 262/264 looper letters, 10 selfloop transitions, 1 changer transitions 0/12 dead transitions. [2023-08-29 19:50:48,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 12 transitions, 64 flow [2023-08-29 19:50:48,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:50:48,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:50:48,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2023-08-29 19:50:48,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36237373737373735 [2023-08-29 19:50:48,681 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 287 transitions. [2023-08-29 19:50:48,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 287 transitions. [2023-08-29 19:50:48,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:50:48,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 287 transitions. [2023-08-29 19:50:48,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:48,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:48,683 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:48,683 INFO L175 Difference]: Start difference. First operand has 23 places, 13 transitions, 44 flow. Second operand 3 states and 287 transitions. [2023-08-29 19:50:48,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 12 transitions, 64 flow [2023-08-29 19:50:48,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 12 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:50:48,683 INFO L231 Difference]: Finished difference. Result has 23 places, 12 transitions, 43 flow [2023-08-29 19:50:48,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=41, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=43, PETRI_PLACES=23, PETRI_TRANSITIONS=12} [2023-08-29 19:50:48,684 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -40 predicate places. [2023-08-29 19:50:48,684 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 12 transitions, 43 flow [2023-08-29 19:50:48,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 93.33333333333333) internal successors, (560), 6 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:48,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:50:48,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:50:48,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 19:50:48,684 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thr1Err18ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-29 19:50:48,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:50:48,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1660202193, now seen corresponding path program 1 times [2023-08-29 19:50:48,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:50:48,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127761409] [2023-08-29 19:50:48,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:50:48,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:50:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:50:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:50:49,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:50:49,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127761409] [2023-08-29 19:50:49,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127761409] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:50:49,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:50:49,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 19:50:49,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408361140] [2023-08-29 19:50:49,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:50:49,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 19:50:49,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:50:49,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 19:50:49,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-29 19:50:49,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 264 [2023-08-29 19:50:49,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 12 transitions, 43 flow. Second operand has 8 states, 8 states have (on average 77.0) internal successors, (616), 8 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:49,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:50:49,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 264 [2023-08-29 19:50:49,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:50:49,338 INFO L130 PetriNetUnfolder]: 23/66 cut-off events. [2023-08-29 19:50:49,338 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:50:49,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 66 events. 23/66 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 158 event pairs, 0 based on Foata normal form. 3/62 useless extension candidates. Maximal degree in co-relation 141. Up to 30 conditions per place. [2023-08-29 19:50:49,339 INFO L137 encePairwiseOnDemand]: 258/264 looper letters, 20 selfloop transitions, 7 changer transitions 0/28 dead transitions. [2023-08-29 19:50:49,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 28 transitions, 129 flow [2023-08-29 19:50:49,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 19:50:49,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 19:50:49,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 560 transitions. [2023-08-29 19:50:49,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30303030303030304 [2023-08-29 19:50:49,341 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 560 transitions. [2023-08-29 19:50:49,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 560 transitions. [2023-08-29 19:50:49,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:50:49,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 560 transitions. [2023-08-29 19:50:49,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:49,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 264.0) internal successors, (2112), 8 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:49,344 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 264.0) internal successors, (2112), 8 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:49,344 INFO L175 Difference]: Start difference. First operand has 23 places, 12 transitions, 43 flow. Second operand 7 states and 560 transitions. [2023-08-29 19:50:49,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 28 transitions, 129 flow [2023-08-29 19:50:49,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 28 transitions, 128 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:50:49,345 INFO L231 Difference]: Finished difference. Result has 29 places, 16 transitions, 73 flow [2023-08-29 19:50:49,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=73, PETRI_PLACES=29, PETRI_TRANSITIONS=16} [2023-08-29 19:50:49,345 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -34 predicate places. [2023-08-29 19:50:49,345 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 16 transitions, 73 flow [2023-08-29 19:50:49,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 77.0) internal successors, (616), 8 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:49,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:50:49,345 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:50:49,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 19:50:49,345 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thr1Err18ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-29 19:50:49,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:50:49,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1546696176, now seen corresponding path program 1 times [2023-08-29 19:50:49,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:50:49,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841730398] [2023-08-29 19:50:49,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:50:49,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:50:49,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:50:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:50:49,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:50:49,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841730398] [2023-08-29 19:50:49,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841730398] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:50:49,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659001473] [2023-08-29 19:50:49,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:50:49,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:50:49,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:50:49,694 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:50:49,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 19:50:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:50:49,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-29 19:50:49,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:50:49,873 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-08-29 19:50:49,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2023-08-29 19:50:49,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2023-08-29 19:50:50,020 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-29 19:50:50,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-08-29 19:50:51,065 INFO L321 Elim1Store]: treesize reduction 548, result has 19.3 percent of original size [2023-08-29 19:50:51,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 7 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 440 treesize of output 1083 [2023-08-29 19:50:51,225 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-29 19:50:51,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 290 treesize of output 297 [2023-08-29 19:50:51,304 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-08-29 19:50:51,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 280 treesize of output 270 [2023-08-29 19:50:51,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-08-29 19:50:51,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 22 [2023-08-29 19:50:51,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-08-29 19:50:51,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-08-29 19:50:52,821 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2023-08-29 19:50:52,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 184 treesize of output 160 [2023-08-29 19:50:52,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:50:52,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:50:52,896 INFO L321 Elim1Store]: treesize reduction 54, result has 23.9 percent of original size [2023-08-29 19:50:52,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 152 [2023-08-29 19:50:52,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:50:52,943 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2023-08-29 19:50:52,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 43 [2023-08-29 19:50:52,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2023-08-29 19:50:53,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:50:53,537 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 19:50:53,541 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 19:50:53,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 48 [2023-08-29 19:50:53,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-08-29 19:50:53,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:50:53,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 304 treesize of output 303 [2023-08-29 19:50:53,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 239 [2023-08-29 19:50:53,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 237 [2023-08-29 19:50:53,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 17 [2023-08-29 19:50:53,800 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 19:50:53,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 11 [2023-08-29 19:50:53,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-08-29 19:50:53,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-08-29 19:50:53,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:50:53,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:50:53,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:50:53,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:50:53,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:50:53,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:50:53,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 128 [2023-08-29 19:50:54,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:50:54,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:50:54,160 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 19:50:54,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 48 [2023-08-29 19:50:54,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-08-29 19:50:54,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-08-29 19:50:54,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-08-29 19:50:54,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:50:54,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:50:54,671 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-29 19:50:54,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 277 treesize of output 284 [2023-08-29 19:50:54,708 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:50:54,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 267 treesize of output 282 [2023-08-29 19:50:59,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:50:59,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659001473] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:50:59,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:50:59,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 19 [2023-08-29 19:50:59,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256195721] [2023-08-29 19:50:59,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:50:59,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-29 19:50:59,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:50:59,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-29 19:50:59,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=334, Unknown=7, NotChecked=0, Total=420 [2023-08-29 19:50:59,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 264 [2023-08-29 19:50:59,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 16 transitions, 73 flow. Second operand has 21 states, 21 states have (on average 52.42857142857143) internal successors, (1101), 21 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:50:59,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:50:59,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 264 [2023-08-29 19:50:59,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:51:12,256 WARN L222 SmtUtils]: Spent 12.11s on a formula simplification. DAG size of input: 94 DAG size of output: 80 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 19:51:29,740 WARN L222 SmtUtils]: Spent 15.39s on a formula simplification. DAG size of input: 123 DAG size of output: 91 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 19:51:52,609 WARN L222 SmtUtils]: Spent 20.74s on a formula simplification that was a NOOP. DAG size: 136 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 19:51:54,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:51:56,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:51:57,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:52:00,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:52:02,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:52:04,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:52:04,664 INFO L130 PetriNetUnfolder]: 7/39 cut-off events. [2023-08-29 19:52:04,664 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-29 19:52:04,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 39 events. 7/39 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 54 event pairs, 0 based on Foata normal form. 3/39 useless extension candidates. Maximal degree in co-relation 106. Up to 8 conditions per place. [2023-08-29 19:52:04,664 INFO L137 encePairwiseOnDemand]: 256/264 looper letters, 10 selfloop transitions, 10 changer transitions 5/26 dead transitions. [2023-08-29 19:52:04,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 26 transitions, 146 flow [2023-08-29 19:52:04,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 19:52:04,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 19:52:04,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 590 transitions. [2023-08-29 19:52:04,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.20316804407713498 [2023-08-29 19:52:04,667 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 590 transitions. [2023-08-29 19:52:04,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 590 transitions. [2023-08-29 19:52:04,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:52:04,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 590 transitions. [2023-08-29 19:52:04,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 53.63636363636363) internal successors, (590), 11 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:52:04,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 264.0) internal successors, (3168), 12 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:52:04,671 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 264.0) internal successors, (3168), 12 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:52:04,671 INFO L175 Difference]: Start difference. First operand has 29 places, 16 transitions, 73 flow. Second operand 11 states and 590 transitions. [2023-08-29 19:52:04,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 26 transitions, 146 flow [2023-08-29 19:52:04,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 26 transitions, 142 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:52:04,672 INFO L231 Difference]: Finished difference. Result has 42 places, 18 transitions, 115 flow [2023-08-29 19:52:04,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=115, PETRI_PLACES=42, PETRI_TRANSITIONS=18} [2023-08-29 19:52:04,672 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -21 predicate places. [2023-08-29 19:52:04,673 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 18 transitions, 115 flow [2023-08-29 19:52:04,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 52.42857142857143) internal successors, (1101), 21 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:52:04,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:52:04,673 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 19:52:04,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 19:52:04,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-29 19:52:04,885 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thr1Err18ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-29 19:52:04,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:52:04,886 INFO L85 PathProgramCache]: Analyzing trace with hash -410873836, now seen corresponding path program 1 times [2023-08-29 19:52:04,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:52:04,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422553128] [2023-08-29 19:52:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:52:04,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:52:04,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:52:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:52:06,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:52:06,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422553128] [2023-08-29 19:52:06,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422553128] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:52:06,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931683546] [2023-08-29 19:52:06,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:52:06,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:52:06,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:52:06,225 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:52:06,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 19:52:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:52:06,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 19:52:06,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:52:06,829 INFO L321 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2023-08-29 19:52:06,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 281 [2023-08-29 19:52:06,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 19:52:06,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 19:52:06,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 19:52:07,064 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 19:52:07,083 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 19:52:07,088 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 19:52:07,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 74 [2023-08-29 19:52:07,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-08-29 19:52:07,158 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 19:52:07,181 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 19:52:07,225 INFO L321 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2023-08-29 19:52:07,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 92 [2023-08-29 19:52:07,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-08-29 19:52:07,729 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 19:52:07,769 INFO L321 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2023-08-29 19:52:07,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 23 [2023-08-29 19:52:07,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-08-29 19:52:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:52:08,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:52:08,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931683546] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:52:08,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 19:52:08,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2023-08-29 19:52:08,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492765758] [2023-08-29 19:52:08,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:52:08,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:52:08,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:52:08,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:52:08,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-08-29 19:52:08,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 264 [2023-08-29 19:52:08,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 18 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:52:08,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:52:08,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 264 [2023-08-29 19:52:08,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:52:08,936 INFO L130 PetriNetUnfolder]: 5/34 cut-off events. [2023-08-29 19:52:08,936 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-29 19:52:08,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 34 events. 5/34 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 73 event pairs, 2 based on Foata normal form. 1/35 useless extension candidates. Maximal degree in co-relation 130. Up to 17 conditions per place. [2023-08-29 19:52:08,937 INFO L137 encePairwiseOnDemand]: 260/264 looper letters, 0 selfloop transitions, 0 changer transitions 18/18 dead transitions. [2023-08-29 19:52:08,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 18 transitions, 139 flow [2023-08-29 19:52:08,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:52:08,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:52:08,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 320 transitions. [2023-08-29 19:52:08,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30303030303030304 [2023-08-29 19:52:08,938 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 320 transitions. [2023-08-29 19:52:08,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 320 transitions. [2023-08-29 19:52:08,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:52:08,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 320 transitions. [2023-08-29 19:52:08,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:52:08,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 264.0) internal successors, (1320), 5 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:52:08,941 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 264.0) internal successors, (1320), 5 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:52:08,941 INFO L175 Difference]: Start difference. First operand has 42 places, 18 transitions, 115 flow. Second operand 4 states and 320 transitions. [2023-08-29 19:52:08,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 18 transitions, 139 flow [2023-08-29 19:52:08,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 18 transitions, 106 flow, removed 1 selfloop flow, removed 12 redundant places. [2023-08-29 19:52:08,941 INFO L231 Difference]: Finished difference. Result has 31 places, 0 transitions, 0 flow [2023-08-29 19:52:08,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=31, PETRI_TRANSITIONS=0} [2023-08-29 19:52:08,942 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -32 predicate places. [2023-08-29 19:52:08,942 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 0 transitions, 0 flow [2023-08-29 19:52:08,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:52:08,944 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 79 remaining) [2023-08-29 19:52:08,944 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 79 remaining) [2023-08-29 19:52:08,944 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 79 remaining) [2023-08-29 19:52:08,944 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 79 remaining) [2023-08-29 19:52:08,944 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 79 remaining) [2023-08-29 19:52:08,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 79 remaining) [2023-08-29 19:52:08,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 79 remaining) [2023-08-29 19:52:08,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 79 remaining) [2023-08-29 19:52:08,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 79 remaining) [2023-08-29 19:52:08,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 79 remaining) [2023-08-29 19:52:08,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 79 remaining) [2023-08-29 19:52:08,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 79 remaining) [2023-08-29 19:52:08,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 79 remaining) [2023-08-29 19:52:08,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 79 remaining) [2023-08-29 19:52:08,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 79 remaining) [2023-08-29 19:52:08,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 79 remaining) [2023-08-29 19:52:08,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 79 remaining) [2023-08-29 19:52:08,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 79 remaining) [2023-08-29 19:52:08,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 79 remaining) [2023-08-29 19:52:08,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 79 remaining) [2023-08-29 19:52:08,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 79 remaining) [2023-08-29 19:52:08,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 79 remaining) [2023-08-29 19:52:08,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 79 remaining) [2023-08-29 19:52:08,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 79 remaining) [2023-08-29 19:52:08,947 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 79 remaining) [2023-08-29 19:52:08,947 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 79 remaining) [2023-08-29 19:52:08,947 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 79 remaining) [2023-08-29 19:52:08,947 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 79 remaining) [2023-08-29 19:52:08,947 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err37ASSERT_VIOLATIONMEMORY_LEAK (50 of 79 remaining) [2023-08-29 19:52:08,947 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err37ASSERT_VIOLATIONMEMORY_LEAK (49 of 79 remaining) [2023-08-29 19:52:08,947 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 79 remaining) [2023-08-29 19:52:08,947 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 79 remaining) [2023-08-29 19:52:08,947 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 79 remaining) [2023-08-29 19:52:08,947 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 79 remaining) [2023-08-29 19:52:08,948 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 79 remaining) [2023-08-29 19:52:08,948 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 79 remaining) [2023-08-29 19:52:08,948 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 79 remaining) [2023-08-29 19:52:08,948 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 79 remaining) [2023-08-29 19:52:08,948 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 79 remaining) [2023-08-29 19:52:08,948 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 79 remaining) [2023-08-29 19:52:08,948 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 79 remaining) [2023-08-29 19:52:08,948 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 79 remaining) [2023-08-29 19:52:08,948 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 79 remaining) [2023-08-29 19:52:08,949 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 79 remaining) [2023-08-29 19:52:08,949 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 79 remaining) [2023-08-29 19:52:08,949 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 79 remaining) [2023-08-29 19:52:08,949 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 79 remaining) [2023-08-29 19:52:08,949 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 79 remaining) [2023-08-29 19:52:08,949 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 79 remaining) [2023-08-29 19:52:08,949 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (29 of 79 remaining) [2023-08-29 19:52:08,949 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 79 remaining) [2023-08-29 19:52:08,949 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 79 remaining) [2023-08-29 19:52:08,949 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 79 remaining) [2023-08-29 19:52:08,950 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 79 remaining) [2023-08-29 19:52:08,950 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 79 remaining) [2023-08-29 19:52:08,950 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 79 remaining) [2023-08-29 19:52:08,950 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 79 remaining) [2023-08-29 19:52:08,950 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 79 remaining) [2023-08-29 19:52:08,950 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (20 of 79 remaining) [2023-08-29 19:52:08,950 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 79 remaining) [2023-08-29 19:52:08,950 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 79 remaining) [2023-08-29 19:52:08,950 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 79 remaining) [2023-08-29 19:52:08,951 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 79 remaining) [2023-08-29 19:52:08,951 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 79 remaining) [2023-08-29 19:52:08,951 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 79 remaining) [2023-08-29 19:52:08,951 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (13 of 79 remaining) [2023-08-29 19:52:08,951 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 79 remaining) [2023-08-29 19:52:08,951 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 79 remaining) [2023-08-29 19:52:08,951 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 79 remaining) [2023-08-29 19:52:08,951 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 79 remaining) [2023-08-29 19:52:08,951 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 79 remaining) [2023-08-29 19:52:08,951 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 79 remaining) [2023-08-29 19:52:08,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 79 remaining) [2023-08-29 19:52:08,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 79 remaining) [2023-08-29 19:52:08,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 79 remaining) [2023-08-29 19:52:08,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 79 remaining) [2023-08-29 19:52:08,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 79 remaining) [2023-08-29 19:52:08,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 79 remaining) [2023-08-29 19:52:08,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 79 remaining) [2023-08-29 19:52:08,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 19:52:09,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-29 19:52:09,157 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:52:09,159 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 19:52:09,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 140 transitions, 285 flow [2023-08-29 19:52:09,180 INFO L130 PetriNetUnfolder]: 9/155 cut-off events. [2023-08-29 19:52:09,180 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:52:09,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 155 events. 9/155 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 540 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 118. Up to 4 conditions per place. [2023-08-29 19:52:09,181 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 140 transitions, 285 flow [2023-08-29 19:52:09,182 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 140 transitions, 285 flow [2023-08-29 19:52:09,182 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:52:09,182 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 140 transitions, 285 flow [2023-08-29 19:52:09,182 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 140 transitions, 285 flow [2023-08-29 19:52:09,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 140 transitions, 285 flow [2023-08-29 19:52:09,191 INFO L130 PetriNetUnfolder]: 9/155 cut-off events. [2023-08-29 19:52:09,191 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:52:09,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 155 events. 9/155 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 540 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 118. Up to 4 conditions per place. [2023-08-29 19:52:09,192 INFO L119 LiptonReduction]: Number of co-enabled transitions 3636 [2023-08-29 19:52:41,736 INFO L134 LiptonReduction]: Checked pairs total: 9248 [2023-08-29 19:52:41,736 INFO L136 LiptonReduction]: Total number of compositions: 123 [2023-08-29 19:52:41,737 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 19:52:41,737 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;@5b970bf6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:52:41,737 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 19:52:41,740 INFO L130 PetriNetUnfolder]: 1/30 cut-off events. [2023-08-29 19:52:41,740 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:52:41,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:52:41,740 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-29 19:52:41,740 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 19:52:41,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:52:41,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1666032479, now seen corresponding path program 1 times [2023-08-29 19:52:41,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:52:41,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191286741] [2023-08-29 19:52:41,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:52:41,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:52:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:52:41,747 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 19:52:41,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:52:41,761 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 19:52:41,762 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 19:52:41,762 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 19:52:41,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 19:52:41,762 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 19:52:41,762 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 19:52:41,763 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 19:52:41,763 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 19:52:41,821 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 19:52:41,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 242 transitions, 496 flow [2023-08-29 19:52:41,848 INFO L130 PetriNetUnfolder]: 17/274 cut-off events. [2023-08-29 19:52:41,848 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:52:41,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 274 events. 17/274 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1281 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 219. Up to 6 conditions per place. [2023-08-29 19:52:41,850 INFO L82 GeneralOperation]: Start removeDead. Operand has 232 places, 242 transitions, 496 flow [2023-08-29 19:52:41,853 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 232 places, 242 transitions, 496 flow [2023-08-29 19:52:41,853 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:52:41,853 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 232 places, 242 transitions, 496 flow [2023-08-29 19:52:41,853 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 232 places, 242 transitions, 496 flow [2023-08-29 19:52:41,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 242 transitions, 496 flow [2023-08-29 19:52:41,875 INFO L130 PetriNetUnfolder]: 17/274 cut-off events. [2023-08-29 19:52:41,875 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:52:41,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 274 events. 17/274 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1281 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 219. Up to 6 conditions per place. [2023-08-29 19:52:41,885 INFO L119 LiptonReduction]: Number of co-enabled transitions 27876 [2023-08-29 19:53:25,775 INFO L134 LiptonReduction]: Checked pairs total: 70657 [2023-08-29 19:53:25,775 INFO L136 LiptonReduction]: Total number of compositions: 185 [2023-08-29 19:53:25,776 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:53:25,776 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;@5b970bf6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:53:25,776 INFO L358 AbstractCegarLoop]: Starting to check reachability of 117 error locations. [2023-08-29 19:53:25,777 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 19:53:25,777 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:53:25,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:53:25,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:53:25,777 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-08-29 19:53:25,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:53:25,778 INFO L85 PathProgramCache]: Analyzing trace with hash 46594, now seen corresponding path program 1 times [2023-08-29 19:53:25,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:53:25,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888738618] [2023-08-29 19:53:25,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:53:25,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:53:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:53:25,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:53:25,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:53:25,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888738618] [2023-08-29 19:53:25,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888738618] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:53:25,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:53:25,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:53:25,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327575294] [2023-08-29 19:53:25,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:53:25,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:53:25,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:53:25,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:53:25,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:53:26,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 427 [2023-08-29 19:53:26,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 127 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:26,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:53:26,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 427 [2023-08-29 19:53:26,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:53:27,889 INFO L130 PetriNetUnfolder]: 8848/14721 cut-off events. [2023-08-29 19:53:27,889 INFO L131 PetriNetUnfolder]: For 185/185 co-relation queries the response was YES. [2023-08-29 19:53:27,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28743 conditions, 14721 events. 8848/14721 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 2346. Compared 131193 event pairs, 7250 based on Foata normal form. 0/5032 useless extension candidates. Maximal degree in co-relation 5460. Up to 12320 conditions per place. [2023-08-29 19:53:27,951 INFO L137 encePairwiseOnDemand]: 403/427 looper letters, 171 selfloop transitions, 10 changer transitions 0/200 dead transitions. [2023-08-29 19:53:27,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 200 transitions, 779 flow [2023-08-29 19:53:27,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:53:27,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:53:27,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 664 transitions. [2023-08-29 19:53:27,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5183450429352069 [2023-08-29 19:53:27,954 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 664 transitions. [2023-08-29 19:53:27,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 664 transitions. [2023-08-29 19:53:27,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:53:27,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 664 transitions. [2023-08-29 19:53:27,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:27,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:27,957 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:27,957 INFO L175 Difference]: Start difference. First operand has 118 places, 127 transitions, 266 flow. Second operand 3 states and 664 transitions. [2023-08-29 19:53:27,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 200 transitions, 779 flow [2023-08-29 19:53:27,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 200 transitions, 777 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-29 19:53:27,960 INFO L231 Difference]: Finished difference. Result has 110 places, 120 transitions, 310 flow [2023-08-29 19:53:27,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=310, PETRI_PLACES=110, PETRI_TRANSITIONS=120} [2023-08-29 19:53:27,961 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, -8 predicate places. [2023-08-29 19:53:27,961 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 120 transitions, 310 flow [2023-08-29 19:53:27,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:27,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:53:27,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:53:27,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 19:53:27,962 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-08-29 19:53:27,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:53:27,962 INFO L85 PathProgramCache]: Analyzing trace with hash 46593, now seen corresponding path program 1 times [2023-08-29 19:53:27,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:53:27,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525542246] [2023-08-29 19:53:27,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:53:27,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:53:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:53:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:53:28,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:53:28,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525542246] [2023-08-29 19:53:28,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525542246] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:53:28,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:53:28,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:53:28,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759745181] [2023-08-29 19:53:28,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:53:28,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:53:28,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:53:28,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:53:28,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:53:28,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 427 [2023-08-29 19:53:28,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 120 transitions, 310 flow. Second operand has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:28,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:53:28,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 427 [2023-08-29 19:53:28,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:53:29,307 INFO L130 PetriNetUnfolder]: 5410/9431 cut-off events. [2023-08-29 19:53:29,307 INFO L131 PetriNetUnfolder]: For 2975/2975 co-relation queries the response was YES. [2023-08-29 19:53:29,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21389 conditions, 9431 events. 5410/9431 cut-off events. For 2975/2975 co-relation queries the response was YES. Maximal size of possible extension queue 1342. Compared 81284 event pairs, 4589 based on Foata normal form. 1536/5724 useless extension candidates. Maximal degree in co-relation 17302. Up to 8725 conditions per place. [2023-08-29 19:53:29,340 INFO L137 encePairwiseOnDemand]: 425/427 looper letters, 99 selfloop transitions, 1 changer transitions 0/119 dead transitions. [2023-08-29 19:53:29,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 119 transitions, 508 flow [2023-08-29 19:53:29,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:53:29,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:53:29,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 578 transitions. [2023-08-29 19:53:29,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45120999219359875 [2023-08-29 19:53:29,359 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 578 transitions. [2023-08-29 19:53:29,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 578 transitions. [2023-08-29 19:53:29,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:53:29,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 578 transitions. [2023-08-29 19:53:29,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:29,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:29,362 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:29,362 INFO L175 Difference]: Start difference. First operand has 110 places, 120 transitions, 310 flow. Second operand 3 states and 578 transitions. [2023-08-29 19:53:29,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 119 transitions, 508 flow [2023-08-29 19:53:29,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 119 transitions, 488 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:53:29,372 INFO L231 Difference]: Finished difference. Result has 109 places, 119 transitions, 290 flow [2023-08-29 19:53:29,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=290, PETRI_PLACES=109, PETRI_TRANSITIONS=119} [2023-08-29 19:53:29,373 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, -9 predicate places. [2023-08-29 19:53:29,373 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 119 transitions, 290 flow [2023-08-29 19:53:29,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:29,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:53:29,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:53:29,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-29 19:53:29,374 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-08-29 19:53:29,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:53:29,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1389349362, now seen corresponding path program 1 times [2023-08-29 19:53:29,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:53:29,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13942146] [2023-08-29 19:53:29,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:53:29,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:53:29,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:53:29,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:53:29,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:53:29,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13942146] [2023-08-29 19:53:29,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13942146] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:53:29,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:53:29,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:53:29,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548463346] [2023-08-29 19:53:29,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:53:29,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:53:29,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:53:29,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:53:29,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:53:29,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 427 [2023-08-29 19:53:29,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 119 transitions, 290 flow. Second operand has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:29,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:53:29,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 427 [2023-08-29 19:53:29,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:53:31,550 INFO L130 PetriNetUnfolder]: 4630/8231 cut-off events. [2023-08-29 19:53:31,551 INFO L131 PetriNetUnfolder]: For 1663/1667 co-relation queries the response was YES. [2023-08-29 19:53:31,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18229 conditions, 8231 events. 4630/8231 cut-off events. For 1663/1667 co-relation queries the response was YES. Maximal size of possible extension queue 1202. Compared 71568 event pairs, 3423 based on Foata normal form. 2/3798 useless extension candidates. Maximal degree in co-relation 18219. Up to 6056 conditions per place. [2023-08-29 19:53:31,579 INFO L137 encePairwiseOnDemand]: 368/427 looper letters, 198 selfloop transitions, 59 changer transitions 12/284 dead transitions. [2023-08-29 19:53:31,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 284 transitions, 1219 flow [2023-08-29 19:53:31,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:53:31,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:53:31,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 851 transitions. [2023-08-29 19:53:31,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49824355971896955 [2023-08-29 19:53:31,582 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 851 transitions. [2023-08-29 19:53:31,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 851 transitions. [2023-08-29 19:53:31,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:53:31,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 851 transitions. [2023-08-29 19:53:31,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 212.75) internal successors, (851), 4 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:31,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 427.0) internal successors, (2135), 5 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:31,586 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 427.0) internal successors, (2135), 5 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:31,586 INFO L175 Difference]: Start difference. First operand has 109 places, 119 transitions, 290 flow. Second operand 4 states and 851 transitions. [2023-08-29 19:53:31,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 284 transitions, 1219 flow [2023-08-29 19:53:31,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 284 transitions, 1218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:53:31,590 INFO L231 Difference]: Finished difference. Result has 114 places, 169 transitions, 789 flow [2023-08-29 19:53:31,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=789, PETRI_PLACES=114, PETRI_TRANSITIONS=169} [2023-08-29 19:53:31,591 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, -4 predicate places. [2023-08-29 19:53:31,591 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 169 transitions, 789 flow [2023-08-29 19:53:31,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:31,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:53:31,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:53:31,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-29 19:53:31,592 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-08-29 19:53:31,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:53:31,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1389349363, now seen corresponding path program 1 times [2023-08-29 19:53:31,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:53:31,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61931215] [2023-08-29 19:53:31,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:53:31,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:53:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:53:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:53:31,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:53:31,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61931215] [2023-08-29 19:53:31,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61931215] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:53:31,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:53:31,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:53:31,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53846029] [2023-08-29 19:53:31,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:53:31,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:53:31,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:53:31,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:53:31,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:53:32,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 427 [2023-08-29 19:53:32,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 169 transitions, 789 flow. Second operand has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:32,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:53:32,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 427 [2023-08-29 19:53:32,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:53:33,233 INFO L130 PetriNetUnfolder]: 3716/6547 cut-off events. [2023-08-29 19:53:33,233 INFO L131 PetriNetUnfolder]: For 2943/2947 co-relation queries the response was YES. [2023-08-29 19:53:33,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18565 conditions, 6547 events. 3716/6547 cut-off events. For 2943/2947 co-relation queries the response was YES. Maximal size of possible extension queue 945. Compared 54391 event pairs, 2857 based on Foata normal form. 558/4008 useless extension candidates. Maximal degree in co-relation 18551. Up to 6121 conditions per place. [2023-08-29 19:53:33,259 INFO L137 encePairwiseOnDemand]: 414/427 looper letters, 141 selfloop transitions, 1 changer transitions 0/157 dead transitions. [2023-08-29 19:53:33,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 157 transitions, 1049 flow [2023-08-29 19:53:33,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:53:33,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:53:33,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 569 transitions. [2023-08-29 19:53:33,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44418423106947696 [2023-08-29 19:53:33,261 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 569 transitions. [2023-08-29 19:53:33,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 569 transitions. [2023-08-29 19:53:33,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:53:33,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 569 transitions. [2023-08-29 19:53:33,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:33,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:33,264 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:33,264 INFO L175 Difference]: Start difference. First operand has 114 places, 169 transitions, 789 flow. Second operand 3 states and 569 transitions. [2023-08-29 19:53:33,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 157 transitions, 1049 flow [2023-08-29 19:53:33,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 157 transitions, 1049 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:53:33,276 INFO L231 Difference]: Finished difference. Result has 104 places, 157 transitions, 767 flow [2023-08-29 19:53:33,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=767, PETRI_PLACES=104, PETRI_TRANSITIONS=157} [2023-08-29 19:53:33,276 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, -14 predicate places. [2023-08-29 19:53:33,276 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 157 transitions, 767 flow [2023-08-29 19:53:33,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:33,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:53:33,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:53:33,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-29 19:53:33,277 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-08-29 19:53:33,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:53:33,277 INFO L85 PathProgramCache]: Analyzing trace with hash 120165931, now seen corresponding path program 1 times [2023-08-29 19:53:33,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:53:33,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462225048] [2023-08-29 19:53:33,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:53:33,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:53:33,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:53:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:53:33,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:53:33,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462225048] [2023-08-29 19:53:33,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462225048] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:53:33,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:53:33,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:53:33,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919472966] [2023-08-29 19:53:33,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:53:33,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:53:33,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:53:33,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:53:33,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:53:33,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 427 [2023-08-29 19:53:33,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 157 transitions, 767 flow. Second operand has 4 states, 4 states have (on average 154.5) internal successors, (618), 4 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:33,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:53:33,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 427 [2023-08-29 19:53:33,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:53:35,087 INFO L130 PetriNetUnfolder]: 3328/5896 cut-off events. [2023-08-29 19:53:35,088 INFO L131 PetriNetUnfolder]: For 2713/2725 co-relation queries the response was YES. [2023-08-29 19:53:35,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16791 conditions, 5896 events. 3328/5896 cut-off events. For 2713/2725 co-relation queries the response was YES. Maximal size of possible extension queue 848. Compared 48537 event pairs, 2431 based on Foata normal form. 2/3203 useless extension candidates. Maximal degree in co-relation 16775. Up to 4148 conditions per place. [2023-08-29 19:53:35,106 INFO L137 encePairwiseOnDemand]: 414/427 looper letters, 193 selfloop transitions, 9 changer transitions 0/217 dead transitions. [2023-08-29 19:53:35,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 217 transitions, 1370 flow [2023-08-29 19:53:35,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:53:35,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:53:35,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 614 transitions. [2023-08-29 19:53:35,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47931303669008585 [2023-08-29 19:53:35,108 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 614 transitions. [2023-08-29 19:53:35,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 614 transitions. [2023-08-29 19:53:35,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:53:35,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 614 transitions. [2023-08-29 19:53:35,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:35,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:35,111 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:35,111 INFO L175 Difference]: Start difference. First operand has 104 places, 157 transitions, 767 flow. Second operand 3 states and 614 transitions. [2023-08-29 19:53:35,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 217 transitions, 1370 flow [2023-08-29 19:53:35,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 217 transitions, 1369 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:53:35,117 INFO L231 Difference]: Finished difference. Result has 106 places, 157 transitions, 801 flow [2023-08-29 19:53:35,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=801, PETRI_PLACES=106, PETRI_TRANSITIONS=157} [2023-08-29 19:53:35,118 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, -12 predicate places. [2023-08-29 19:53:35,118 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 157 transitions, 801 flow [2023-08-29 19:53:35,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.5) internal successors, (618), 4 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:35,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:53:35,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:53:35,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-29 19:53:35,118 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-08-29 19:53:35,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:53:35,119 INFO L85 PathProgramCache]: Analyzing trace with hash 120165938, now seen corresponding path program 1 times [2023-08-29 19:53:35,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:53:35,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507456406] [2023-08-29 19:53:35,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:53:35,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:53:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:53:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:53:35,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:53:35,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507456406] [2023-08-29 19:53:35,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507456406] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:53:35,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:53:35,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:53:35,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605289334] [2023-08-29 19:53:35,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:53:35,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:53:35,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:53:35,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:53:35,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:53:35,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 427 [2023-08-29 19:53:35,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 157 transitions, 801 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:35,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:53:35,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 427 [2023-08-29 19:53:35,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:53:36,383 INFO L130 PetriNetUnfolder]: 3134/5479 cut-off events. [2023-08-29 19:53:36,383 INFO L131 PetriNetUnfolder]: For 3877/3879 co-relation queries the response was YES. [2023-08-29 19:53:36,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16629 conditions, 5479 events. 3134/5479 cut-off events. For 3877/3879 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 45808 event pairs, 1363 based on Foata normal form. 0/3086 useless extension candidates. Maximal degree in co-relation 16611. Up to 3154 conditions per place. [2023-08-29 19:53:36,401 INFO L137 encePairwiseOnDemand]: 421/427 looper letters, 167 selfloop transitions, 7 changer transitions 0/188 dead transitions. [2023-08-29 19:53:36,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 188 transitions, 1280 flow [2023-08-29 19:53:36,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:53:36,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:53:36,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 602 transitions. [2023-08-29 19:53:36,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46994535519125685 [2023-08-29 19:53:36,403 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 602 transitions. [2023-08-29 19:53:36,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 602 transitions. [2023-08-29 19:53:36,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:53:36,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 602 transitions. [2023-08-29 19:53:36,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:36,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:36,406 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:36,406 INFO L175 Difference]: Start difference. First operand has 106 places, 157 transitions, 801 flow. Second operand 3 states and 602 transitions. [2023-08-29 19:53:36,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 188 transitions, 1280 flow [2023-08-29 19:53:36,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 188 transitions, 1254 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:53:36,413 INFO L231 Difference]: Finished difference. Result has 103 places, 152 transitions, 775 flow [2023-08-29 19:53:36,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=775, PETRI_PLACES=103, PETRI_TRANSITIONS=152} [2023-08-29 19:53:36,414 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, -15 predicate places. [2023-08-29 19:53:36,414 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 152 transitions, 775 flow [2023-08-29 19:53:36,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:36,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:53:36,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:53:36,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-29 19:53:36,415 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-08-29 19:53:36,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:53:36,415 INFO L85 PathProgramCache]: Analyzing trace with hash 120165937, now seen corresponding path program 1 times [2023-08-29 19:53:36,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:53:36,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994863111] [2023-08-29 19:53:36,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:53:36,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:53:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:53:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:53:36,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:53:36,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994863111] [2023-08-29 19:53:36,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994863111] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:53:36,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:53:36,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:53:36,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366393677] [2023-08-29 19:53:36,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:53:36,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:53:36,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:53:36,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:53:36,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:53:36,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 427 [2023-08-29 19:53:36,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 152 transitions, 775 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:36,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:53:36,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 427 [2023-08-29 19:53:36,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:53:37,744 INFO L130 PetriNetUnfolder]: 2978/5192 cut-off events. [2023-08-29 19:53:37,744 INFO L131 PetriNetUnfolder]: For 2898/2902 co-relation queries the response was YES. [2023-08-29 19:53:37,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15643 conditions, 5192 events. 2978/5192 cut-off events. For 2898/2902 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 42801 event pairs, 1341 based on Foata normal form. 0/3015 useless extension candidates. Maximal degree in co-relation 15626. Up to 3348 conditions per place. [2023-08-29 19:53:37,766 INFO L137 encePairwiseOnDemand]: 414/427 looper letters, 175 selfloop transitions, 14 changer transitions 0/202 dead transitions. [2023-08-29 19:53:37,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 202 transitions, 1364 flow [2023-08-29 19:53:37,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:53:37,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:53:37,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 587 transitions. [2023-08-29 19:53:37,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45823575331772054 [2023-08-29 19:53:37,769 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 587 transitions. [2023-08-29 19:53:37,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 587 transitions. [2023-08-29 19:53:37,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:53:37,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 587 transitions. [2023-08-29 19:53:37,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:37,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:37,772 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:37,772 INFO L175 Difference]: Start difference. First operand has 103 places, 152 transitions, 775 flow. Second operand 3 states and 587 transitions. [2023-08-29 19:53:37,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 202 transitions, 1364 flow [2023-08-29 19:53:37,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 202 transitions, 1346 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:53:37,784 INFO L231 Difference]: Finished difference. Result has 105 places, 161 transitions, 899 flow [2023-08-29 19:53:37,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=899, PETRI_PLACES=105, PETRI_TRANSITIONS=161} [2023-08-29 19:53:37,785 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, -13 predicate places. [2023-08-29 19:53:37,785 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 161 transitions, 899 flow [2023-08-29 19:53:37,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:37,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:53:37,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:53:37,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-29 19:53:37,786 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-08-29 19:53:37,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:53:37,786 INFO L85 PathProgramCache]: Analyzing trace with hash 120168707, now seen corresponding path program 1 times [2023-08-29 19:53:37,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:53:37,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675656499] [2023-08-29 19:53:37,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:53:37,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:53:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:53:37,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:53:37,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:53:37,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675656499] [2023-08-29 19:53:37,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675656499] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:53:37,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:53:37,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:53:37,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602253642] [2023-08-29 19:53:37,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:53:37,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:53:37,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:53:37,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:53:37,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:53:38,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 427 [2023-08-29 19:53:38,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 161 transitions, 899 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:38,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:53:38,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 427 [2023-08-29 19:53:38,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:53:39,136 INFO L130 PetriNetUnfolder]: 2824/4974 cut-off events. [2023-08-29 19:53:39,136 INFO L131 PetriNetUnfolder]: For 4524/4532 co-relation queries the response was YES. [2023-08-29 19:53:39,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15653 conditions, 4974 events. 2824/4974 cut-off events. For 4524/4532 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 41604 event pairs, 1035 based on Foata normal form. 0/3040 useless extension candidates. Maximal degree in co-relation 15635. Up to 2832 conditions per place. [2023-08-29 19:53:39,155 INFO L137 encePairwiseOnDemand]: 414/427 looper letters, 186 selfloop transitions, 14 changer transitions 0/213 dead transitions. [2023-08-29 19:53:39,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 213 transitions, 1522 flow [2023-08-29 19:53:39,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:53:39,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:53:39,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 589 transitions. [2023-08-29 19:53:39,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4597970335675254 [2023-08-29 19:53:39,157 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 589 transitions. [2023-08-29 19:53:39,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 589 transitions. [2023-08-29 19:53:39,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:53:39,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 589 transitions. [2023-08-29 19:53:39,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:39,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:39,160 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:39,160 INFO L175 Difference]: Start difference. First operand has 105 places, 161 transitions, 899 flow. Second operand 3 states and 589 transitions. [2023-08-29 19:53:39,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 213 transitions, 1522 flow [2023-08-29 19:53:39,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 213 transitions, 1494 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:53:39,171 INFO L231 Difference]: Finished difference. Result has 107 places, 170 transitions, 1017 flow [2023-08-29 19:53:39,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1017, PETRI_PLACES=107, PETRI_TRANSITIONS=170} [2023-08-29 19:53:39,172 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, -11 predicate places. [2023-08-29 19:53:39,172 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 170 transitions, 1017 flow [2023-08-29 19:53:39,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:39,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:53:39,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:53:39,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-29 19:53:39,172 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-08-29 19:53:39,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:53:39,173 INFO L85 PathProgramCache]: Analyzing trace with hash 120168710, now seen corresponding path program 1 times [2023-08-29 19:53:39,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:53:39,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590987911] [2023-08-29 19:53:39,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:53:39,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:53:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:53:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:53:39,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:53:39,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590987911] [2023-08-29 19:53:39,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590987911] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:53:39,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:53:39,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:53:39,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457251542] [2023-08-29 19:53:39,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:53:39,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:53:39,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:53:39,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:53:39,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:53:39,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 427 [2023-08-29 19:53:39,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 170 transitions, 1017 flow. Second operand has 4 states, 4 states have (on average 161.5) internal successors, (646), 4 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:39,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:53:39,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 427 [2023-08-29 19:53:39,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:53:40,638 INFO L130 PetriNetUnfolder]: 2656/4841 cut-off events. [2023-08-29 19:53:40,639 INFO L131 PetriNetUnfolder]: For 5016/5036 co-relation queries the response was YES. [2023-08-29 19:53:40,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15847 conditions, 4841 events. 2656/4841 cut-off events. For 5016/5036 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 40211 event pairs, 868 based on Foata normal form. 0/3117 useless extension candidates. Maximal degree in co-relation 15828. Up to 3694 conditions per place. [2023-08-29 19:53:40,657 INFO L137 encePairwiseOnDemand]: 415/427 looper letters, 220 selfloop transitions, 12 changer transitions 0/246 dead transitions. [2023-08-29 19:53:40,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 246 transitions, 1936 flow [2023-08-29 19:53:40,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:53:40,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:53:40,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 607 transitions. [2023-08-29 19:53:40,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47384855581576896 [2023-08-29 19:53:40,659 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 607 transitions. [2023-08-29 19:53:40,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 607 transitions. [2023-08-29 19:53:40,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:53:40,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 607 transitions. [2023-08-29 19:53:40,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:40,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:40,661 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:40,661 INFO L175 Difference]: Start difference. First operand has 107 places, 170 transitions, 1017 flow. Second operand 3 states and 607 transitions. [2023-08-29 19:53:40,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 246 transitions, 1936 flow [2023-08-29 19:53:40,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 246 transitions, 1890 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-29 19:53:40,677 INFO L231 Difference]: Finished difference. Result has 108 places, 181 transitions, 1125 flow [2023-08-29 19:53:40,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1125, PETRI_PLACES=108, PETRI_TRANSITIONS=181} [2023-08-29 19:53:40,677 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, -10 predicate places. [2023-08-29 19:53:40,677 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 181 transitions, 1125 flow [2023-08-29 19:53:40,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.5) internal successors, (646), 4 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:40,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:53:40,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:53:40,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-29 19:53:40,678 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-08-29 19:53:40,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:53:40,678 INFO L85 PathProgramCache]: Analyzing trace with hash 120165932, now seen corresponding path program 1 times [2023-08-29 19:53:40,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:53:40,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373982192] [2023-08-29 19:53:40,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:53:40,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:53:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:53:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:53:40,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:53:40,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373982192] [2023-08-29 19:53:40,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373982192] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:53:40,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:53:40,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:53:40,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325105371] [2023-08-29 19:53:40,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:53:40,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:53:40,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:53:40,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:53:40,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:53:41,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 427 [2023-08-29 19:53:41,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 181 transitions, 1125 flow. Second operand has 4 states, 4 states have (on average 164.5) internal successors, (658), 4 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:41,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:53:41,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 427 [2023-08-29 19:53:41,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:53:41,799 INFO L130 PetriNetUnfolder]: 2285/4224 cut-off events. [2023-08-29 19:53:41,800 INFO L131 PetriNetUnfolder]: For 4087/4115 co-relation queries the response was YES. [2023-08-29 19:53:41,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14265 conditions, 4224 events. 2285/4224 cut-off events. For 4087/4115 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 34116 event pairs, 1467 based on Foata normal form. 96/3064 useless extension candidates. Maximal degree in co-relation 14244. Up to 3944 conditions per place. [2023-08-29 19:53:41,814 INFO L137 encePairwiseOnDemand]: 422/427 looper letters, 160 selfloop transitions, 1 changer transitions 0/175 dead transitions. [2023-08-29 19:53:41,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 175 transitions, 1423 flow [2023-08-29 19:53:41,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:53:41,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:53:41,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 570 transitions. [2023-08-29 19:53:41,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4449648711943794 [2023-08-29 19:53:41,815 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 570 transitions. [2023-08-29 19:53:41,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 570 transitions. [2023-08-29 19:53:41,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:53:41,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 570 transitions. [2023-08-29 19:53:41,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:41,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:41,817 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:41,818 INFO L175 Difference]: Start difference. First operand has 108 places, 181 transitions, 1125 flow. Second operand 3 states and 570 transitions. [2023-08-29 19:53:41,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 175 transitions, 1423 flow [2023-08-29 19:53:41,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 175 transitions, 1411 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:53:41,825 INFO L231 Difference]: Finished difference. Result has 105 places, 175 transitions, 1091 flow [2023-08-29 19:53:41,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1091, PETRI_PLACES=105, PETRI_TRANSITIONS=175} [2023-08-29 19:53:41,826 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, -13 predicate places. [2023-08-29 19:53:41,826 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 175 transitions, 1091 flow [2023-08-29 19:53:41,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.5) internal successors, (658), 4 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:41,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:53:41,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:53:41,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-29 19:53:41,827 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-08-29 19:53:41,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:53:41,827 INFO L85 PathProgramCache]: Analyzing trace with hash -484605669, now seen corresponding path program 1 times [2023-08-29 19:53:41,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:53:41,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779406128] [2023-08-29 19:53:41,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:53:41,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:53:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:53:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:53:42,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:53:42,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779406128] [2023-08-29 19:53:42,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779406128] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:53:42,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:53:42,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 19:53:42,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105711263] [2023-08-29 19:53:42,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:53:42,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:53:42,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:53:42,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:53:42,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:53:42,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 427 [2023-08-29 19:53:42,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 175 transitions, 1091 flow. Second operand has 6 states, 6 states have (on average 147.33333333333334) internal successors, (884), 6 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:42,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:53:42,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 427 [2023-08-29 19:53:42,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:53:43,606 INFO L130 PetriNetUnfolder]: 2067/3862 cut-off events. [2023-08-29 19:53:43,606 INFO L131 PetriNetUnfolder]: For 3778/3806 co-relation queries the response was YES. [2023-08-29 19:53:43,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13075 conditions, 3862 events. 2067/3862 cut-off events. For 3778/3806 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 31094 event pairs, 1215 based on Foata normal form. 2/2798 useless extension candidates. Maximal degree in co-relation 13053. Up to 1973 conditions per place. [2023-08-29 19:53:43,623 INFO L137 encePairwiseOnDemand]: 414/427 looper letters, 194 selfloop transitions, 17 changer transitions 0/225 dead transitions. [2023-08-29 19:53:43,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 225 transitions, 1724 flow [2023-08-29 19:53:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:53:43,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:53:43,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 573 transitions. [2023-08-29 19:53:43,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44730679156908665 [2023-08-29 19:53:43,625 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 573 transitions. [2023-08-29 19:53:43,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 573 transitions. [2023-08-29 19:53:43,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:53:43,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 573 transitions. [2023-08-29 19:53:43,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:43,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:43,627 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:43,627 INFO L175 Difference]: Start difference. First operand has 105 places, 175 transitions, 1091 flow. Second operand 3 states and 573 transitions. [2023-08-29 19:53:43,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 225 transitions, 1724 flow [2023-08-29 19:53:43,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 225 transitions, 1723 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:53:43,636 INFO L231 Difference]: Finished difference. Result has 107 places, 175 transitions, 1149 flow [2023-08-29 19:53:43,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=1090, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1149, PETRI_PLACES=107, PETRI_TRANSITIONS=175} [2023-08-29 19:53:43,636 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, -11 predicate places. [2023-08-29 19:53:43,636 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 175 transitions, 1149 flow [2023-08-29 19:53:43,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 147.33333333333334) internal successors, (884), 6 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:43,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:53:43,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:53:43,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-29 19:53:43,637 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-08-29 19:53:43,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:53:43,637 INFO L85 PathProgramCache]: Analyzing trace with hash -484605668, now seen corresponding path program 1 times [2023-08-29 19:53:43,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:53:43,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30659838] [2023-08-29 19:53:43,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:53:43,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:53:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:53:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:53:43,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:53:43,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30659838] [2023-08-29 19:53:43,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30659838] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:53:43,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:53:43,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 19:53:43,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081940038] [2023-08-29 19:53:43,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:53:43,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:53:43,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:53:43,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:53:43,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:53:44,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 427 [2023-08-29 19:53:44,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 175 transitions, 1149 flow. Second operand has 6 states, 6 states have (on average 158.33333333333334) internal successors, (950), 6 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:44,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:53:44,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 427 [2023-08-29 19:53:44,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:53:45,235 INFO L130 PetriNetUnfolder]: 1841/3456 cut-off events. [2023-08-29 19:53:45,235 INFO L131 PetriNetUnfolder]: For 4609/4637 co-relation queries the response was YES. [2023-08-29 19:53:45,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12455 conditions, 3456 events. 1841/3456 cut-off events. For 4609/4637 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 27295 event pairs, 1101 based on Foata normal form. 0/2636 useless extension candidates. Maximal degree in co-relation 12431. Up to 3202 conditions per place. [2023-08-29 19:53:45,248 INFO L137 encePairwiseOnDemand]: 422/427 looper letters, 154 selfloop transitions, 1 changer transitions 0/169 dead transitions. [2023-08-29 19:53:45,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 169 transitions, 1431 flow [2023-08-29 19:53:45,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:53:45,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:53:45,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 548 transitions. [2023-08-29 19:53:45,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4277907884465261 [2023-08-29 19:53:45,250 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 548 transitions. [2023-08-29 19:53:45,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 548 transitions. [2023-08-29 19:53:45,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:53:45,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 548 transitions. [2023-08-29 19:53:45,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:45,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:45,252 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:45,252 INFO L175 Difference]: Start difference. First operand has 107 places, 175 transitions, 1149 flow. Second operand 3 states and 548 transitions. [2023-08-29 19:53:45,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 169 transitions, 1431 flow [2023-08-29 19:53:45,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 169 transitions, 1397 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:53:45,263 INFO L231 Difference]: Finished difference. Result has 103 places, 169 transitions, 1089 flow [2023-08-29 19:53:45,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1089, PETRI_PLACES=103, PETRI_TRANSITIONS=169} [2023-08-29 19:53:45,263 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, -15 predicate places. [2023-08-29 19:53:45,263 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 169 transitions, 1089 flow [2023-08-29 19:53:45,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 158.33333333333334) internal successors, (950), 6 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:45,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:53:45,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:53:45,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-29 19:53:45,264 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thr1Err18ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-08-29 19:53:45,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:53:45,264 INFO L85 PathProgramCache]: Analyzing trace with hash -484605665, now seen corresponding path program 1 times [2023-08-29 19:53:45,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:53:45,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18822508] [2023-08-29 19:53:45,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:53:45,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:53:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:53:45,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:53:45,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:53:45,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18822508] [2023-08-29 19:53:45,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18822508] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:53:45,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:53:45,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 19:53:45,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796620800] [2023-08-29 19:53:45,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:53:45,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 19:53:45,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:53:45,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 19:53:45,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-29 19:53:47,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 427 [2023-08-29 19:53:47,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 169 transitions, 1089 flow. Second operand has 8 states, 8 states have (on average 133.0) internal successors, (1064), 8 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:47,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:53:47,642 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 427 [2023-08-29 19:53:47,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:53:50,975 INFO L130 PetriNetUnfolder]: 3030/5421 cut-off events. [2023-08-29 19:53:50,976 INFO L131 PetriNetUnfolder]: For 5535/5541 co-relation queries the response was YES. [2023-08-29 19:53:50,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19206 conditions, 5421 events. 3030/5421 cut-off events. For 5535/5541 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 43960 event pairs, 554 based on Foata normal form. 56/4209 useless extension candidates. Maximal degree in co-relation 19182. Up to 3235 conditions per place. [2023-08-29 19:53:50,996 INFO L137 encePairwiseOnDemand]: 404/427 looper letters, 337 selfloop transitions, 92 changer transitions 0/438 dead transitions. [2023-08-29 19:53:50,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 438 transitions, 3387 flow [2023-08-29 19:53:50,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 19:53:50,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 19:53:50,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1895 transitions. [2023-08-29 19:53:50,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3698282591725215 [2023-08-29 19:53:50,999 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1895 transitions. [2023-08-29 19:53:50,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1895 transitions. [2023-08-29 19:53:50,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:53:50,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1895 transitions. [2023-08-29 19:53:51,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 157.91666666666666) internal successors, (1895), 12 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:51,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 427.0) internal successors, (5551), 13 states have internal predecessors, (5551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:51,006 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 427.0) internal successors, (5551), 13 states have internal predecessors, (5551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:51,006 INFO L175 Difference]: Start difference. First operand has 103 places, 169 transitions, 1089 flow. Second operand 12 states and 1895 transitions. [2023-08-29 19:53:51,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 438 transitions, 3387 flow [2023-08-29 19:53:51,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 438 transitions, 3386 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:53:51,020 INFO L231 Difference]: Finished difference. Result has 122 places, 258 transitions, 2144 flow [2023-08-29 19:53:51,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2144, PETRI_PLACES=122, PETRI_TRANSITIONS=258} [2023-08-29 19:53:51,021 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, 4 predicate places. [2023-08-29 19:53:51,021 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 258 transitions, 2144 flow [2023-08-29 19:53:51,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 133.0) internal successors, (1064), 8 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:51,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:53:51,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:53:51,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-29 19:53:51,022 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-08-29 19:53:51,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:53:51,022 INFO L85 PathProgramCache]: Analyzing trace with hash -2050524685, now seen corresponding path program 1 times [2023-08-29 19:53:51,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:53:51,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204902233] [2023-08-29 19:53:51,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:53:51,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:53:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:53:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:53:51,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:53:51,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204902233] [2023-08-29 19:53:51,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204902233] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:53:51,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:53:51,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:53:51,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175569420] [2023-08-29 19:53:51,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:53:51,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:53:51,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:53:51,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:53:51,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:53:51,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 427 [2023-08-29 19:53:51,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 258 transitions, 2144 flow. Second operand has 4 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:51,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:53:51,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 427 [2023-08-29 19:53:51,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:53:52,858 INFO L130 PetriNetUnfolder]: 2970/5408 cut-off events. [2023-08-29 19:53:52,858 INFO L131 PetriNetUnfolder]: For 13482/13533 co-relation queries the response was YES. [2023-08-29 19:53:52,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23304 conditions, 5408 events. 2970/5408 cut-off events. For 13482/13533 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 43721 event pairs, 1109 based on Foata normal form. 54/4690 useless extension candidates. Maximal degree in co-relation 23270. Up to 2980 conditions per place. [2023-08-29 19:53:52,883 INFO L137 encePairwiseOnDemand]: 412/427 looper letters, 342 selfloop transitions, 54 changer transitions 6/415 dead transitions. [2023-08-29 19:53:52,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 415 transitions, 3885 flow [2023-08-29 19:53:52,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:53:52,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:53:52,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 771 transitions. [2023-08-29 19:53:52,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45140515222482436 [2023-08-29 19:53:52,885 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 771 transitions. [2023-08-29 19:53:52,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 771 transitions. [2023-08-29 19:53:52,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:53:52,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 771 transitions. [2023-08-29 19:53:52,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 192.75) internal successors, (771), 4 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:52,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 427.0) internal successors, (2135), 5 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:52,888 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 427.0) internal successors, (2135), 5 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:52,888 INFO L175 Difference]: Start difference. First operand has 122 places, 258 transitions, 2144 flow. Second operand 4 states and 771 transitions. [2023-08-29 19:53:52,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 415 transitions, 3885 flow [2023-08-29 19:53:52,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 415 transitions, 3847 flow, removed 19 selfloop flow, removed 0 redundant places. [2023-08-29 19:53:52,925 INFO L231 Difference]: Finished difference. Result has 127 places, 273 transitions, 2438 flow [2023-08-29 19:53:52,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=2110, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2438, PETRI_PLACES=127, PETRI_TRANSITIONS=273} [2023-08-29 19:53:52,925 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, 9 predicate places. [2023-08-29 19:53:52,925 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 273 transitions, 2438 flow [2023-08-29 19:53:52,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:52,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:53:52,926 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:53:52,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-29 19:53:52,926 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-08-29 19:53:52,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:53:52,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1589504529, now seen corresponding path program 1 times [2023-08-29 19:53:52,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:53:52,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639942813] [2023-08-29 19:53:52,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:53:52,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:53:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:53:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:53:52,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:53:52,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639942813] [2023-08-29 19:53:52,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639942813] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:53:52,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:53:52,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:53:52,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494673750] [2023-08-29 19:53:52,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:53:52,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:53:52,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:53:52,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:53:52,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:53:53,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 427 [2023-08-29 19:53:53,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 273 transitions, 2438 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:53,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:53:53,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 427 [2023-08-29 19:53:53,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:53:54,157 INFO L130 PetriNetUnfolder]: 2818/5100 cut-off events. [2023-08-29 19:53:54,157 INFO L131 PetriNetUnfolder]: For 19083/19124 co-relation queries the response was YES. [2023-08-29 19:53:54,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23569 conditions, 5100 events. 2818/5100 cut-off events. For 19083/19124 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 40414 event pairs, 1042 based on Foata normal form. 0/4419 useless extension candidates. Maximal degree in co-relation 23531. Up to 3512 conditions per place. [2023-08-29 19:53:54,180 INFO L137 encePairwiseOnDemand]: 421/427 looper letters, 257 selfloop transitions, 21 changer transitions 0/292 dead transitions. [2023-08-29 19:53:54,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 292 transitions, 3189 flow [2023-08-29 19:53:54,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:53:54,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:53:54,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 572 transitions. [2023-08-29 19:53:54,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4465261514441842 [2023-08-29 19:53:54,181 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 572 transitions. [2023-08-29 19:53:54,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 572 transitions. [2023-08-29 19:53:54,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:53:54,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 572 transitions. [2023-08-29 19:53:54,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:54,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:54,183 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:54,184 INFO L175 Difference]: Start difference. First operand has 127 places, 273 transitions, 2438 flow. Second operand 3 states and 572 transitions. [2023-08-29 19:53:54,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 292 transitions, 3189 flow [2023-08-29 19:53:54,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 292 transitions, 3189 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:53:54,221 INFO L231 Difference]: Finished difference. Result has 126 places, 265 transitions, 2420 flow [2023-08-29 19:53:54,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=2378, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2420, PETRI_PLACES=126, PETRI_TRANSITIONS=265} [2023-08-29 19:53:54,221 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, 8 predicate places. [2023-08-29 19:53:54,222 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 265 transitions, 2420 flow [2023-08-29 19:53:54,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:54,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:53:54,222 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:53:54,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-29 19:53:54,222 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-08-29 19:53:54,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:53:54,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1589504530, now seen corresponding path program 1 times [2023-08-29 19:53:54,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:53:54,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261680205] [2023-08-29 19:53:54,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:53:54,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:53:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:53:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:53:54,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:53:54,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261680205] [2023-08-29 19:53:54,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261680205] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:53:54,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:53:54,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:53:54,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044719624] [2023-08-29 19:53:54,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:53:54,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:53:54,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:53:54,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:53:54,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:53:54,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 427 [2023-08-29 19:53:54,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 265 transitions, 2420 flow. Second operand has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:54,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:53:54,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 427 [2023-08-29 19:53:54,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:53:55,503 INFO L130 PetriNetUnfolder]: 2745/4991 cut-off events. [2023-08-29 19:53:55,503 INFO L131 PetriNetUnfolder]: For 19687/19732 co-relation queries the response was YES. [2023-08-29 19:53:55,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23341 conditions, 4991 events. 2745/4991 cut-off events. For 19687/19732 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 39710 event pairs, 1022 based on Foata normal form. 86/4450 useless extension candidates. Maximal degree in co-relation 23302. Up to 3779 conditions per place. [2023-08-29 19:53:55,529 INFO L137 encePairwiseOnDemand]: 415/427 looper letters, 262 selfloop transitions, 30 changer transitions 1/306 dead transitions. [2023-08-29 19:53:55,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 306 transitions, 3366 flow [2023-08-29 19:53:55,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:53:55,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:53:55,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 554 transitions. [2023-08-29 19:53:55,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43247462919594065 [2023-08-29 19:53:55,530 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 554 transitions. [2023-08-29 19:53:55,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 554 transitions. [2023-08-29 19:53:55,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:53:55,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 554 transitions. [2023-08-29 19:53:55,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:55,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:55,532 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:55,532 INFO L175 Difference]: Start difference. First operand has 126 places, 265 transitions, 2420 flow. Second operand 3 states and 554 transitions. [2023-08-29 19:53:55,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 306 transitions, 3366 flow [2023-08-29 19:53:55,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 306 transitions, 3314 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:53:55,604 INFO L231 Difference]: Finished difference. Result has 128 places, 277 transitions, 2674 flow [2023-08-29 19:53:55,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=2370, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2674, PETRI_PLACES=128, PETRI_TRANSITIONS=277} [2023-08-29 19:53:55,605 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, 10 predicate places. [2023-08-29 19:53:55,605 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 277 transitions, 2674 flow [2023-08-29 19:53:55,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:55,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:53:55,605 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:53:55,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-29 19:53:55,605 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-08-29 19:53:55,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:53:55,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1589506493, now seen corresponding path program 1 times [2023-08-29 19:53:55,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:53:55,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154385472] [2023-08-29 19:53:55,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:53:55,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:53:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:53:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:53:55,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:53:55,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154385472] [2023-08-29 19:53:55,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154385472] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:53:55,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:53:55,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:53:55,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444624471] [2023-08-29 19:53:55,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:53:55,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:53:55,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:53:55,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:53:55,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:53:55,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 427 [2023-08-29 19:53:55,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 277 transitions, 2674 flow. Second operand has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:55,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:53:55,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 427 [2023-08-29 19:53:55,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:53:56,877 INFO L130 PetriNetUnfolder]: 2579/4762 cut-off events. [2023-08-29 19:53:56,877 INFO L131 PetriNetUnfolder]: For 21517/21570 co-relation queries the response was YES. [2023-08-29 19:53:56,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22942 conditions, 4762 events. 2579/4762 cut-off events. For 21517/21570 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 38339 event pairs, 834 based on Foata normal form. 0/4299 useless extension candidates. Maximal degree in co-relation 22902. Up to 2925 conditions per place. [2023-08-29 19:53:56,902 INFO L137 encePairwiseOnDemand]: 414/427 looper letters, 282 selfloop transitions, 34 changer transitions 1/330 dead transitions. [2023-08-29 19:53:56,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 330 transitions, 3723 flow [2023-08-29 19:53:56,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:53:56,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:53:56,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2023-08-29 19:53:56,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4410616705698673 [2023-08-29 19:53:56,904 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2023-08-29 19:53:56,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2023-08-29 19:53:56,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:53:56,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2023-08-29 19:53:56,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:56,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:56,906 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:56,906 INFO L175 Difference]: Start difference. First operand has 128 places, 277 transitions, 2674 flow. Second operand 3 states and 565 transitions. [2023-08-29 19:53:56,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 330 transitions, 3723 flow [2023-08-29 19:53:56,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 330 transitions, 3663 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:53:56,942 INFO L231 Difference]: Finished difference. Result has 130 places, 285 transitions, 2906 flow [2023-08-29 19:53:56,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=2562, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2906, PETRI_PLACES=130, PETRI_TRANSITIONS=285} [2023-08-29 19:53:56,943 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, 12 predicate places. [2023-08-29 19:53:56,943 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 285 transitions, 2906 flow [2023-08-29 19:53:56,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:56,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:53:56,943 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:53:56,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-29 19:53:56,943 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-08-29 19:53:56,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:53:56,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1589506494, now seen corresponding path program 1 times [2023-08-29 19:53:56,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:53:56,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562635560] [2023-08-29 19:53:56,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:53:56,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:53:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:53:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 19:53:57,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:53:57,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562635560] [2023-08-29 19:53:57,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562635560] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:53:57,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:53:57,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:53:57,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589078285] [2023-08-29 19:53:57,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:53:57,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:53:57,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:53:57,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:53:57,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:53:57,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 427 [2023-08-29 19:53:57,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 285 transitions, 2906 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:57,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:53:57,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 427 [2023-08-29 19:53:57,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:53:58,132 INFO L130 PetriNetUnfolder]: 2285/4258 cut-off events. [2023-08-29 19:53:58,133 INFO L131 PetriNetUnfolder]: For 22488/22544 co-relation queries the response was YES. [2023-08-29 19:53:58,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21273 conditions, 4258 events. 2285/4258 cut-off events. For 22488/22544 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 33954 event pairs, 836 based on Foata normal form. 224/4196 useless extension candidates. Maximal degree in co-relation 21232. Up to 2533 conditions per place. [2023-08-29 19:53:58,153 INFO L137 encePairwiseOnDemand]: 421/427 looper letters, 266 selfloop transitions, 25 changer transitions 0/304 dead transitions. [2023-08-29 19:53:58,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 304 transitions, 3596 flow [2023-08-29 19:53:58,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:53:58,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:53:58,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 579 transitions. [2023-08-29 19:53:58,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519906323185012 [2023-08-29 19:53:58,155 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 579 transitions. [2023-08-29 19:53:58,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 579 transitions. [2023-08-29 19:53:58,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:53:58,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 579 transitions. [2023-08-29 19:53:58,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:58,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:58,156 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:58,157 INFO L175 Difference]: Start difference. First operand has 130 places, 285 transitions, 2906 flow. Second operand 3 states and 579 transitions. [2023-08-29 19:53:58,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 304 transitions, 3596 flow [2023-08-29 19:53:58,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 304 transitions, 3518 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-29 19:53:58,195 INFO L231 Difference]: Finished difference. Result has 127 places, 270 transitions, 2760 flow [2023-08-29 19:53:58,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=2710, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2760, PETRI_PLACES=127, PETRI_TRANSITIONS=270} [2023-08-29 19:53:58,195 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, 9 predicate places. [2023-08-29 19:53:58,195 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 270 transitions, 2760 flow [2023-08-29 19:53:58,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:53:58,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:53:58,196 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:53:58,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-29 19:53:58,196 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thr1Err18ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-08-29 19:53:58,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:53:58,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1507717384, now seen corresponding path program 1 times [2023-08-29 19:53:58,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:53:58,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292646534] [2023-08-29 19:53:58,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:53:58,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:53:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:53:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:53:58,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:53:58,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292646534] [2023-08-29 19:53:58,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292646534] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:53:58,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050046209] [2023-08-29 19:53:58,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:53:58,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:53:58,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:53:58,806 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:53:58,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 19:53:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:53:58,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-29 19:53:58,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:53:59,016 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-08-29 19:53:59,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2023-08-29 19:53:59,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2023-08-29 19:53:59,365 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-08-29 19:53:59,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2023-08-29 19:54:00,196 INFO L321 Elim1Store]: treesize reduction 200, result has 23.7 percent of original size [2023-08-29 19:54:00,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 326 treesize of output 498 [2023-08-29 19:54:00,303 INFO L321 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-08-29 19:54:00,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 225 treesize of output 224 [2023-08-29 19:54:00,344 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-08-29 19:54:00,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 215 treesize of output 205 [2023-08-29 19:54:00,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 19:54:00,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 19:54:00,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 19:54:00,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-08-29 19:54:01,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 153 [2023-08-29 19:54:01,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 66 [2023-08-29 19:54:01,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2023-08-29 19:54:01,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-08-29 19:54:01,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 11 [2023-08-29 19:54:01,574 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-08-29 19:54:01,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-08-29 19:54:03,307 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2023-08-29 19:54:03,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 338 treesize of output 347 [2023-08-29 19:54:03,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 118 [2023-08-29 19:54:03,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-08-29 19:54:03,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-08-29 19:54:03,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-08-29 19:54:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:54:04,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:54:04,467 WARN L839 $PredicateComparison]: unable to prove that (or (= (mod (select (select |c_#memory_int| |c_thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.base|) |c_thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.offset|) 4294967296) 0) (forall ((v_ArrVal_559 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t~0#1.base| v_ArrVal_559))) (or (not (= (mod (select (select .cse0 |c_~#dec_flag~0.base|) |c_~#dec_flag~0.offset|) 4294967296) 0)) (< (mod |c_thr1Thread1of2ForFork0_inc_~inc__v~0#1| 4294967296) (mod (select (select .cse0 |c_~#value~0.base|) |c_~#value~0.offset|) 4294967296)))))) is different from false [2023-08-29 19:54:04,799 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-29 19:54:04,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 273 treesize of output 280 [2023-08-29 19:54:04,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:54:04,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 263 treesize of output 278 [2023-08-29 19:54:07,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:54:07,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050046209] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:54:07,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:54:07,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 19 [2023-08-29 19:54:07,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139686910] [2023-08-29 19:54:07,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:54:07,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-29 19:54:07,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:54:07,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-29 19:54:07,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=305, Unknown=7, NotChecked=36, Total=420 [2023-08-29 19:54:08,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 427 [2023-08-29 19:54:08,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 270 transitions, 2760 flow. Second operand has 21 states, 21 states have (on average 99.28571428571429) internal successors, (2085), 21 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:54:08,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:54:08,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 427 [2023-08-29 19:54:08,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:54:48,432 WARN L222 SmtUtils]: Spent 6.20s on a formula simplification that was a NOOP. DAG size: 108 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 19:54:48,916 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse13 (select (select |c_#memory_int| |c_~#value~0.base|) |c_~#value~0.offset|))) (let ((.cse1 (mod |c_thr1Thread1of2ForFork0_inc_~inc__v~0#1| 4294967296)) (.cse7 (mod .cse13 4294967296))) (let ((.cse3 (= .cse1 .cse7)) (.cse2 (< |c_~#value~0.offset| 0)) (.cse9 (+ 1 .cse13))) (and (or (forall ((v_ArrVal_556 (Array Int Int)) (v_ArrVal_559 (Array Int Int)) (|thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.offset| Int) (v_ArrVal_552 (Array Int Int)) (v_ArrVal_555 (Array Int Int)) (v_ArrVal_554 (Array Int Int))) (let ((.cse0 (store (store (store (store |c_#memory_int| |c_~#inc_flag~0.base| v_ArrVal_554) |c_~#value~0.base| (store (select (store |c_#memory_int| |c_~#inc_flag~0.base| v_ArrVal_556) |c_~#value~0.base|) |c_~#value~0.offset| |c_thr1Thread1of2ForFork0_inc_~inc__vn~0#1|)) |c_thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.base| (store (select (store (store |c_#memory_int| |c_~#inc_flag~0.base| v_ArrVal_552) |c_~#value~0.base| v_ArrVal_555) |c_thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.base|) |thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.offset| 1)) |c_ULTIMATE.start_main_~#t~0#1.base| v_ArrVal_559))) (or (< |thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.offset| 0) (not (= (mod (select (select .cse0 |c_~#dec_flag~0.base|) |c_~#dec_flag~0.offset|) 4294967296) 0)) (< .cse1 (mod (select (select .cse0 |c_~#value~0.base|) |c_~#value~0.offset|) 4294967296))))) .cse2 (not .cse3)) (or (forall ((v_ArrVal_556 (Array Int Int)) (v_ArrVal_559 (Array Int Int)) (v_ArrVal_549 (Array Int Int)) (|thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.offset| Int) (|v_thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.base_83| Int) (v_ArrVal_552 (Array Int Int)) (v_ArrVal_555 (Array Int Int)) (v_ArrVal_554 (Array Int Int))) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t~0#1.base| v_ArrVal_549))) (let ((.cse5 (select (select .cse6 |c_~#value~0.base|) |c_~#value~0.offset|))) (let ((.cse4 (store (store (store (store .cse6 |c_~#inc_flag~0.base| v_ArrVal_554) |c_~#value~0.base| (store (select (store .cse6 |c_~#inc_flag~0.base| v_ArrVal_556) |c_~#value~0.base|) |c_~#value~0.offset| (+ .cse5 1))) |v_thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.base_83| (store (select (store (store .cse6 |c_~#inc_flag~0.base| v_ArrVal_552) |c_~#value~0.base| v_ArrVal_555) |v_thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.base_83|) |thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.offset| 1)) |c_ULTIMATE.start_main_~#t~0#1.base| v_ArrVal_559))) (or (< |thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.offset| 0) (not (= (mod (select (select .cse4 |c_~#dec_flag~0.base|) |c_~#dec_flag~0.offset|) 4294967296) 0)) (< (mod .cse5 4294967296) (mod (select (select .cse4 |c_~#value~0.base|) |c_~#value~0.offset|) 4294967296)) (not (= (select |c_#valid| |v_thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.base_83|) 0))))))) .cse2) (or (forall ((v_ArrVal_556 (Array Int Int)) (v_ArrVal_559 (Array Int Int)) (|thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.offset| Int) (v_ArrVal_552 (Array Int Int)) (v_ArrVal_555 (Array Int Int)) (v_ArrVal_554 (Array Int Int))) (let ((.cse8 (store (store (store (store |c_#memory_int| |c_~#inc_flag~0.base| v_ArrVal_554) |c_~#value~0.base| (store (select (store |c_#memory_int| |c_~#inc_flag~0.base| v_ArrVal_556) |c_~#value~0.base|) |c_~#value~0.offset| .cse9)) |c_thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.base| (store (select (store (store |c_#memory_int| |c_~#inc_flag~0.base| v_ArrVal_552) |c_~#value~0.base| v_ArrVal_555) |c_thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.base|) |thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.offset| 1)) |c_ULTIMATE.start_main_~#t~0#1.base| v_ArrVal_559))) (or (< |thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.offset| 0) (< .cse7 (mod (select (select .cse8 |c_~#value~0.base|) |c_~#value~0.offset|) 4294967296)) (not (= (mod (select (select .cse8 |c_~#dec_flag~0.base|) |c_~#dec_flag~0.offset|) 4294967296) 0))))) .cse2) (or .cse3 .cse2 (forall ((v_ArrVal_559 (Array Int Int)) (v_ArrVal_551 (Array Int Int)) (|thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.offset| Int)) (let ((.cse10 (store (store |c_#memory_int| |c_thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.base| v_ArrVal_551) |c_ULTIMATE.start_main_~#t~0#1.base| v_ArrVal_559))) (or (< |thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.offset| 0) (= 0 (mod (select v_ArrVal_551 |thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.offset|) 4294967296)) (not (= (mod (select (select .cse10 |c_~#dec_flag~0.base|) |c_~#dec_flag~0.offset|) 4294967296) 0)) (< .cse1 (mod (select (select .cse10 |c_~#value~0.base|) |c_~#value~0.offset|) 4294967296)))))) (forall ((v_ArrVal_559 (Array Int Int))) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t~0#1.base| v_ArrVal_559))) (or (not (= (mod (select (select .cse11 |c_~#dec_flag~0.base|) |c_~#dec_flag~0.offset|) 4294967296) 0)) (< .cse1 (mod (select (select .cse11 |c_~#value~0.base|) |c_~#value~0.offset|) 4294967296))))) (or .cse2 (forall ((v_ArrVal_556 (Array Int Int)) (v_ArrVal_559 (Array Int Int)) (|thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.offset| Int) (|v_thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.base_83| Int) (v_ArrVal_552 (Array Int Int)) (v_ArrVal_555 (Array Int Int)) (v_ArrVal_554 (Array Int Int))) (let ((.cse12 (store (store (store (store |c_#memory_int| |c_~#inc_flag~0.base| v_ArrVal_554) |c_~#value~0.base| (store (select (store |c_#memory_int| |c_~#inc_flag~0.base| v_ArrVal_556) |c_~#value~0.base|) |c_~#value~0.offset| .cse9)) |v_thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.base_83| (store (select (store (store |c_#memory_int| |c_~#inc_flag~0.base| v_ArrVal_552) |c_~#value~0.base| v_ArrVal_555) |v_thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.base_83|) |thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.offset| 1)) |c_ULTIMATE.start_main_~#t~0#1.base| v_ArrVal_559))) (or (< |thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.offset| 0) (not (= (mod (select (select .cse12 |c_~#dec_flag~0.base|) |c_~#dec_flag~0.offset|) 4294967296) 0)) (not (= (select |c_#valid| |v_thr1Thread1of2ForFork0_inc_~#inc__casret~0#1.base_83|) 0)) (< .cse7 (mod (select (select .cse12 |c_~#value~0.base|) |c_~#value~0.offset|) 4294967296)))))))))) is different from false [2023-08-29 19:54:50,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:55:00,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:55:03,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 19:55:05,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 19:55:07,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 19:55:09,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:55:12,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:55:14,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:55:31,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:55:33,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:55:40,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:55:42,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:55:45,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:55:48,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:55:50,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:56:01,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:56:14,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:56:17,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 19:56:46,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:56:48,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:56:50,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:56:52,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:57:24,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:57:34,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:57:36,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:57:38,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:57:40,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:57:42,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:58:04,872 WARN L222 SmtUtils]: Spent 9.37s on a formula simplification. DAG size of input: 155 DAG size of output: 148 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 19:58:21,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:58:23,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:58:34,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:58:36,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:58:38,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:58:58,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:59:00,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:59:02,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:59:05,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:59:07,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:59:16,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:59:18,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:59:20,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:59:23,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:59:25,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:59:27,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:59:30,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:59:32,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:59:34,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:59:36,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:59:38,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:59:55,839 WARN L222 SmtUtils]: Spent 8.74s on a formula simplification. DAG size of input: 117 DAG size of output: 94 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 19:59:58,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 19:59:59,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:00:01,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:00:04,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:00:06,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:00:08,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:00:10,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:00:13,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:00:15,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:00:17,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:00:19,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:00:21,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 20:00:23,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 20:00:36,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 20:00:38,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 20:00:40,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 20:00:42,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 20:00:44,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 20:00:46,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:00:48,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:00:50,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:00:52,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:00:54,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:00:56,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:00:59,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:01:10,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:01:12,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:01:19,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:01:21,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:01:24,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:01:27,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:01:29,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:01:31,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:01:33,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:01:35,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:01:37,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:02:04,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:02:07,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:02:09,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:02:11,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:02:13,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:02:15,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:02:17,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:02:20,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:02:22,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:02:24,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:02:26,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:02:29,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:02:54,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:02:57,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:02:59,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:03:39,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:03:41,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:04:35,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:04:38,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:04:40,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:04:42,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 20:04:45,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Killed by 15