./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-ext/14_spin2003.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread-ext/14_spin2003.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 f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 02:31:34,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 02:31:34,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 02:31:34,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 02:31:34,799 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 02:31:34,802 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 02:31:34,804 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 02:31:34,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 02:31:34,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 02:31:34,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 02:31:34,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 02:31:34,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 02:31:34,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 02:31:34,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 02:31:34,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 02:31:34,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 02:31:34,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 02:31:34,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 02:31:34,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 02:31:34,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 02:31:34,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 02:31:34,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 02:31:34,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 02:31:34,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 02:31:34,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 02:31:34,848 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 02:31:34,848 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 02:31:34,848 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 02:31:34,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 02:31:34,850 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 02:31:34,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 02:31:34,850 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 02:31:34,851 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 02:31:34,852 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 02:31:34,861 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 02:31:34,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 02:31:34,862 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 02:31:34,865 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 02:31:34,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 02:31:34,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 02:31:34,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 02:31:34,869 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 02:31:34,886 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 02:31:34,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 02:31:34,889 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 02:31:34,889 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 02:31:34,890 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 02:31:34,890 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 02:31:34,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 02:31:34,891 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 02:31:34,891 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 02:31:34,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 02:31:34,892 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 02:31:34,893 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 02:31:34,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 02:31:34,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 02:31:34,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 02:31:34,894 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 02:31:34,894 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 02:31:34,894 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 02:31:34,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 02:31:34,894 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 02:31:34,895 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 02:31:34,895 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 02:31:34,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 02:31:34,895 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 02:31:34,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 02:31:34,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:31:34,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 02:31:34,896 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 02:31:34,896 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 02:31:34,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 02:31:34,897 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 02:31:34,897 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 02:31:34,897 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 02:31:34,897 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 02:31:34,897 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 02:31:35,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 02:31:35,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 02:31:35,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 02:31:35,175 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 02:31:35,177 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 02:31:35,178 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/14_spin2003.i [2023-08-30 02:31:36,128 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 02:31:36,348 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 02:31:36,348 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003.i [2023-08-30 02:31:36,358 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59e6960ea/156a2265451446a79af32f5068492cb4/FLAGe18ddff79 [2023-08-30 02:31:36,377 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59e6960ea/156a2265451446a79af32f5068492cb4 [2023-08-30 02:31:36,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 02:31:36,381 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 02:31:36,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 02:31:36,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 02:31:36,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 02:31:36,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:31:36" (1/1) ... [2023-08-30 02:31:36,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4984c286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:31:36, skipping insertion in model container [2023-08-30 02:31:36,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:31:36" (1/1) ... [2023-08-30 02:31:36,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 02:31:36,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 02:31:36,650 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/14_spin2003.i[30203,30216] [2023-08-30 02:31:36,657 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:31:36,663 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 02:31:36,683 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/14_spin2003.i[30203,30216] [2023-08-30 02:31:36,685 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:31:36,723 INFO L208 MainTranslator]: Completed translation [2023-08-30 02:31:36,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:31:36 WrapperNode [2023-08-30 02:31:36,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 02:31:36,725 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 02:31:36,725 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 02:31:36,725 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 02:31:36,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:31:36" (1/1) ... [2023-08-30 02:31:36,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:31:36" (1/1) ... [2023-08-30 02:31:36,756 INFO L138 Inliner]: procedures = 169, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 47 [2023-08-30 02:31:36,756 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 02:31:36,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 02:31:36,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 02:31:36,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 02:31:36,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:31:36" (1/1) ... [2023-08-30 02:31:36,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:31:36" (1/1) ... [2023-08-30 02:31:36,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:31:36" (1/1) ... [2023-08-30 02:31:36,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:31:36" (1/1) ... [2023-08-30 02:31:36,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:31:36" (1/1) ... [2023-08-30 02:31:36,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:31:36" (1/1) ... [2023-08-30 02:31:36,770 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:31:36" (1/1) ... [2023-08-30 02:31:36,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:31:36" (1/1) ... [2023-08-30 02:31:36,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 02:31:36,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 02:31:36,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 02:31:36,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 02:31:36,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:31:36" (1/1) ... [2023-08-30 02:31:36,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:31:36,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:31:36,804 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 02:31:36,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 02:31:36,840 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 02:31:36,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 02:31:36,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 02:31:36,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 02:31:36,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 02:31:36,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 02:31:36,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 02:31:36,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 02:31:36,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 02:31:36,841 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 02:31:36,928 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 02:31:36,929 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 02:31:37,047 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 02:31:37,073 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 02:31:37,077 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-30 02:31:37,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:31:37 BoogieIcfgContainer [2023-08-30 02:31:37,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 02:31:37,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 02:31:37,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 02:31:37,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 02:31:37,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 02:31:36" (1/3) ... [2023-08-30 02:31:37,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1135152d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:31:37, skipping insertion in model container [2023-08-30 02:31:37,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:31:36" (2/3) ... [2023-08-30 02:31:37,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1135152d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:31:37, skipping insertion in model container [2023-08-30 02:31:37,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:31:37" (3/3) ... [2023-08-30 02:31:37,085 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2023-08-30 02:31:37,096 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 02:31:37,096 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-08-30 02:31:37,096 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 02:31:37,144 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:31:37,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 44 transitions, 93 flow [2023-08-30 02:31:37,210 INFO L130 PetriNetUnfolder]: 3/59 cut-off events. [2023-08-30 02:31:37,210 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:31:37,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 59 events. 3/59 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 107 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 29. Up to 4 conditions per place. [2023-08-30 02:31:37,214 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 44 transitions, 93 flow [2023-08-30 02:31:37,218 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 44 transitions, 93 flow [2023-08-30 02:31:37,222 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:31:37,237 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 45 places, 44 transitions, 93 flow [2023-08-30 02:31:37,241 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 45 places, 44 transitions, 93 flow [2023-08-30 02:31:37,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 44 transitions, 93 flow [2023-08-30 02:31:37,265 INFO L130 PetriNetUnfolder]: 3/59 cut-off events. [2023-08-30 02:31:37,266 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:31:37,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 59 events. 3/59 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 107 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 29. Up to 4 conditions per place. [2023-08-30 02:31:37,267 INFO L119 LiptonReduction]: Number of co-enabled transitions 432 [2023-08-30 02:31:38,390 INFO L134 LiptonReduction]: Checked pairs total: 394 [2023-08-30 02:31:38,390 INFO L136 LiptonReduction]: Total number of compositions: 46 [2023-08-30 02:31:38,399 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:31:38,404 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;@19a9c22c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:31:38,404 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 02:31:38,406 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:31:38,406 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:31:38,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:31:38,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:31:38,406 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-30 02:31:38,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:31:38,409 INFO L85 PathProgramCache]: Analyzing trace with hash 7316, now seen corresponding path program 1 times [2023-08-30 02:31:38,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:31:38,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453563027] [2023-08-30 02:31:38,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:31:38,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:31:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:31:38,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:31:38,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:31:38,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453563027] [2023-08-30 02:31:38,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453563027] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:31:38,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:31:38,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:31:38,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015596105] [2023-08-30 02:31:38,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:31:38,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:31:38,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:31:38,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:31:38,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:31:38,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 90 [2023-08-30 02:31:38,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 11 transitions, 27 flow. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:38,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:31:38,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 90 [2023-08-30 02:31:38,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:31:38,689 INFO L130 PetriNetUnfolder]: 3/15 cut-off events. [2023-08-30 02:31:38,689 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:31:38,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 15 events. 3/15 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 21 event pairs, 3 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 20. Up to 14 conditions per place. [2023-08-30 02:31:38,690 INFO L137 encePairwiseOnDemand]: 85/90 looper letters, 5 selfloop transitions, 1 changer transitions 0/7 dead transitions. [2023-08-30 02:31:38,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 7 transitions, 31 flow [2023-08-30 02:31:38,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:31:38,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:31:38,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2023-08-30 02:31:38,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40370370370370373 [2023-08-30 02:31:38,700 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 109 transitions. [2023-08-30 02:31:38,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 109 transitions. [2023-08-30 02:31:38,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:31:38,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 109 transitions. [2023-08-30 02:31:38,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:38,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:38,709 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:38,710 INFO L175 Difference]: Start difference. First operand has 14 places, 11 transitions, 27 flow. Second operand 3 states and 109 transitions. [2023-08-30 02:31:38,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 7 transitions, 31 flow [2023-08-30 02:31:38,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 7 transitions, 31 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:31:38,715 INFO L231 Difference]: Finished difference. Result has 12 places, 7 transitions, 21 flow [2023-08-30 02:31:38,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=19, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=21, PETRI_PLACES=12, PETRI_TRANSITIONS=7} [2023-08-30 02:31:38,719 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2023-08-30 02:31:38,719 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 7 transitions, 21 flow [2023-08-30 02:31:38,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:38,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:31:38,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:31:38,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 02:31:38,720 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-30 02:31:38,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:31:38,726 INFO L85 PathProgramCache]: Analyzing trace with hash 7314, now seen corresponding path program 1 times [2023-08-30 02:31:38,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:31:38,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102010960] [2023-08-30 02:31:38,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:31:38,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:31:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:31:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:31:38,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:31:38,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102010960] [2023-08-30 02:31:38,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102010960] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:31:38,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:31:38,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:31:38,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566349441] [2023-08-30 02:31:38,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:31:38,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:31:38,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:31:38,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:31:38,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:31:38,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 90 [2023-08-30 02:31:38,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 7 transitions, 21 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:38,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:31:38,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 90 [2023-08-30 02:31:38,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:31:38,822 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-08-30 02:31:38,822 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:31:38,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 22. Up to 10 conditions per place. [2023-08-30 02:31:38,823 INFO L137 encePairwiseOnDemand]: 88/90 looper letters, 4 selfloop transitions, 1 changer transitions 0/6 dead transitions. [2023-08-30 02:31:38,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 6 transitions, 29 flow [2023-08-30 02:31:38,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:31:38,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:31:38,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2023-08-30 02:31:38,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2023-08-30 02:31:38,825 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 99 transitions. [2023-08-30 02:31:38,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 99 transitions. [2023-08-30 02:31:38,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:31:38,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 99 transitions. [2023-08-30 02:31:38,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:38,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:38,827 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:38,828 INFO L175 Difference]: Start difference. First operand has 12 places, 7 transitions, 21 flow. Second operand 3 states and 99 transitions. [2023-08-30 02:31:38,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 6 transitions, 29 flow [2023-08-30 02:31:38,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 6 transitions, 28 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:31:38,828 INFO L231 Difference]: Finished difference. Result has 12 places, 6 transitions, 20 flow [2023-08-30 02:31:38,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=20, PETRI_PLACES=12, PETRI_TRANSITIONS=6} [2023-08-30 02:31:38,829 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2023-08-30 02:31:38,829 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 6 transitions, 20 flow [2023-08-30 02:31:38,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:38,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:31:38,830 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 02:31:38,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 02:31:38,830 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-30 02:31:38,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:31:38,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1829655041, now seen corresponding path program 1 times [2023-08-30 02:31:38,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:31:38,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177865831] [2023-08-30 02:31:38,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:31:38,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:31:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:31:38,841 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:31:38,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:31:38,877 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:31:38,878 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:31:38,878 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-30 02:31:38,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2023-08-30 02:31:38,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2023-08-30 02:31:38,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-30 02:31:38,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2023-08-30 02:31:38,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2023-08-30 02:31:38,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 02:31:38,881 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 02:31:38,882 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:31:38,882 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 02:31:38,891 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:31:38,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 126 flow [2023-08-30 02:31:38,905 INFO L130 PetriNetUnfolder]: 5/89 cut-off events. [2023-08-30 02:31:38,905 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:31:38,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 89 events. 5/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 194 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 60. Up to 6 conditions per place. [2023-08-30 02:31:38,906 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 57 transitions, 126 flow [2023-08-30 02:31:38,907 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 57 transitions, 126 flow [2023-08-30 02:31:38,907 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:31:38,907 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 126 flow [2023-08-30 02:31:38,907 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 57 transitions, 126 flow [2023-08-30 02:31:38,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 126 flow [2023-08-30 02:31:38,919 INFO L130 PetriNetUnfolder]: 5/89 cut-off events. [2023-08-30 02:31:38,919 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:31:38,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 89 events. 5/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 194 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 60. Up to 6 conditions per place. [2023-08-30 02:31:38,921 INFO L119 LiptonReduction]: Number of co-enabled transitions 1176 [2023-08-30 02:31:39,811 INFO L134 LiptonReduction]: Checked pairs total: 3151 [2023-08-30 02:31:39,812 INFO L136 LiptonReduction]: Total number of compositions: 44 [2023-08-30 02:31:39,814 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:31:39,816 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;@19a9c22c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:31:39,817 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 02:31:39,819 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:31:39,819 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:31:39,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:31:39,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:31:39,819 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 02:31:39,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:31:39,820 INFO L85 PathProgramCache]: Analyzing trace with hash 10966, now seen corresponding path program 1 times [2023-08-30 02:31:39,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:31:39,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695005069] [2023-08-30 02:31:39,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:31:39,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:31:39,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:31:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:31:39,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:31:39,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695005069] [2023-08-30 02:31:39,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695005069] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:31:39,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:31:39,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:31:39,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587205833] [2023-08-30 02:31:39,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:31:39,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:31:39,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:31:39,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:31:39,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:31:39,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 101 [2023-08-30 02:31:39,876 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:39,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:31:39,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 101 [2023-08-30 02:31:39,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:31:39,917 INFO L130 PetriNetUnfolder]: 86/220 cut-off events. [2023-08-30 02:31:39,917 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-30 02:31:39,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 220 events. 86/220 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1164 event pairs, 86 based on Foata normal form. 12/178 useless extension candidates. Maximal degree in co-relation 103. Up to 164 conditions per place. [2023-08-30 02:31:39,918 INFO L137 encePairwiseOnDemand]: 96/101 looper letters, 11 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-08-30 02:31:39,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 20 transitions, 76 flow [2023-08-30 02:31:39,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:31:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:31:39,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2023-08-30 02:31:39,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4389438943894389 [2023-08-30 02:31:39,925 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 133 transitions. [2023-08-30 02:31:39,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 133 transitions. [2023-08-30 02:31:39,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:31:39,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 133 transitions. [2023-08-30 02:31:39,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:39,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:39,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:39,941 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 62 flow. Second operand 3 states and 133 transitions. [2023-08-30 02:31:39,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 20 transitions, 76 flow [2023-08-30 02:31:39,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 20 transitions, 74 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 02:31:39,942 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 52 flow [2023-08-30 02:31:39,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2023-08-30 02:31:39,943 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-08-30 02:31:39,943 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 52 flow [2023-08-30 02:31:39,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:39,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:31:39,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:31:39,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 02:31:39,943 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 02:31:39,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:31:39,944 INFO L85 PathProgramCache]: Analyzing trace with hash 10967, now seen corresponding path program 1 times [2023-08-30 02:31:39,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:31:39,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625763715] [2023-08-30 02:31:39,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:31:39,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:31:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:31:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:31:39,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:31:39,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625763715] [2023-08-30 02:31:39,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625763715] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:31:39,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:31:39,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:31:39,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644162044] [2023-08-30 02:31:39,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:31:39,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:31:39,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:31:39,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:31:39,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:31:39,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 101 [2023-08-30 02:31:39,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:39,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:31:39,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 101 [2023-08-30 02:31:39,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:31:40,010 INFO L130 PetriNetUnfolder]: 51/145 cut-off events. [2023-08-30 02:31:40,010 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 02:31:40,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 145 events. 51/145 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 678 event pairs, 51 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 267. Up to 103 conditions per place. [2023-08-30 02:31:40,013 INFO L137 encePairwiseOnDemand]: 99/101 looper letters, 10 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-30 02:31:40,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 19 transitions, 72 flow [2023-08-30 02:31:40,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:31:40,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:31:40,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2023-08-30 02:31:40,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44554455445544555 [2023-08-30 02:31:40,016 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 135 transitions. [2023-08-30 02:31:40,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 135 transitions. [2023-08-30 02:31:40,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:31:40,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 135 transitions. [2023-08-30 02:31:40,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:40,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:40,019 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:40,020 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 52 flow. Second operand 3 states and 135 transitions. [2023-08-30 02:31:40,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 19 transitions, 72 flow [2023-08-30 02:31:40,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 19 transitions, 71 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:31:40,020 INFO L231 Difference]: Finished difference. Result has 27 places, 19 transitions, 51 flow [2023-08-30 02:31:40,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=27, PETRI_TRANSITIONS=19} [2023-08-30 02:31:40,022 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-08-30 02:31:40,022 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 19 transitions, 51 flow [2023-08-30 02:31:40,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:40,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:31:40,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:31:40,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 02:31:40,023 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 02:31:40,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:31:40,023 INFO L85 PathProgramCache]: Analyzing trace with hash 642039103, now seen corresponding path program 1 times [2023-08-30 02:31:40,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:31:40,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165769829] [2023-08-30 02:31:40,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:31:40,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:31:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:31:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:31:40,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:31:40,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165769829] [2023-08-30 02:31:40,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165769829] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:31:40,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:31:40,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:31:40,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146974063] [2023-08-30 02:31:40,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:31:40,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:31:40,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:31:40,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:31:40,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:31:40,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 101 [2023-08-30 02:31:40,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 19 transitions, 51 flow. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:40,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:31:40,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 101 [2023-08-30 02:31:40,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:31:40,121 INFO L130 PetriNetUnfolder]: 97/220 cut-off events. [2023-08-30 02:31:40,121 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 02:31:40,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445 conditions, 220 events. 97/220 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1009 event pairs, 61 based on Foata normal form. 14/227 useless extension candidates. Maximal degree in co-relation 436. Up to 143 conditions per place. [2023-08-30 02:31:40,122 INFO L137 encePairwiseOnDemand]: 94/101 looper letters, 21 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2023-08-30 02:31:40,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 30 transitions, 130 flow [2023-08-30 02:31:40,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:31:40,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:31:40,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 142 transitions. [2023-08-30 02:31:40,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46864686468646866 [2023-08-30 02:31:40,124 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 142 transitions. [2023-08-30 02:31:40,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 142 transitions. [2023-08-30 02:31:40,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:31:40,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 142 transitions. [2023-08-30 02:31:40,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:40,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:40,125 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:40,126 INFO L175 Difference]: Start difference. First operand has 27 places, 19 transitions, 51 flow. Second operand 3 states and 142 transitions. [2023-08-30 02:31:40,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 30 transitions, 130 flow [2023-08-30 02:31:40,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 30 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:31:40,127 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 90 flow [2023-08-30 02:31:40,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2023-08-30 02:31:40,127 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2023-08-30 02:31:40,128 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 90 flow [2023-08-30 02:31:40,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:40,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:31:40,128 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 02:31:40,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 02:31:40,128 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 02:31:40,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:31:40,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1657171659, now seen corresponding path program 1 times [2023-08-30 02:31:40,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:31:40,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877993766] [2023-08-30 02:31:40,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:31:40,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:31:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:31:40,136 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:31:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:31:40,146 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:31:40,146 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:31:40,147 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 02:31:40,147 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2023-08-30 02:31:40,147 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 02:31:40,147 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 02:31:40,147 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2023-08-30 02:31:40,147 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 02:31:40,147 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 02:31:40,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 02:31:40,147 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 02:31:40,148 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:31:40,148 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 02:31:40,161 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:31:40,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 70 transitions, 161 flow [2023-08-30 02:31:40,176 INFO L130 PetriNetUnfolder]: 7/119 cut-off events. [2023-08-30 02:31:40,176 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 02:31:40,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 119 events. 7/119 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 292 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 93. Up to 8 conditions per place. [2023-08-30 02:31:40,177 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 70 transitions, 161 flow [2023-08-30 02:31:40,186 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 70 transitions, 161 flow [2023-08-30 02:31:40,186 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:31:40,186 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 70 transitions, 161 flow [2023-08-30 02:31:40,187 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 70 transitions, 161 flow [2023-08-30 02:31:40,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 70 transitions, 161 flow [2023-08-30 02:31:40,194 INFO L130 PetriNetUnfolder]: 7/119 cut-off events. [2023-08-30 02:31:40,194 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 02:31:40,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 119 events. 7/119 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 292 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 93. Up to 8 conditions per place. [2023-08-30 02:31:40,196 INFO L119 LiptonReduction]: Number of co-enabled transitions 2232 [2023-08-30 02:31:41,096 INFO L134 LiptonReduction]: Checked pairs total: 7735 [2023-08-30 02:31:41,096 INFO L136 LiptonReduction]: Total number of compositions: 53 [2023-08-30 02:31:41,097 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:31:41,098 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;@19a9c22c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:31:41,098 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-30 02:31:41,099 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:31:41,099 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:31:41,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:31:41,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:31:41,099 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-30 02:31:41,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:31:41,099 INFO L85 PathProgramCache]: Analyzing trace with hash 15293, now seen corresponding path program 1 times [2023-08-30 02:31:41,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:31:41,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313477258] [2023-08-30 02:31:41,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:31:41,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:31:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:31:41,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:31:41,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:31:41,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313477258] [2023-08-30 02:31:41,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313477258] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:31:41,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:31:41,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:31:41,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050496572] [2023-08-30 02:31:41,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:31:41,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:31:41,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:31:41,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:31:41,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:31:41,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 123 [2023-08-30 02:31:41,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 93 flow. Second operand has 2 states, 2 states have (on average 54.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:41,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:31:41,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 123 [2023-08-30 02:31:41,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:31:41,211 INFO L130 PetriNetUnfolder]: 621/1271 cut-off events. [2023-08-30 02:31:41,211 INFO L131 PetriNetUnfolder]: For 142/142 co-relation queries the response was YES. [2023-08-30 02:31:41,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2363 conditions, 1271 events. 621/1271 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 9235 event pairs, 621 based on Foata normal form. 228/1293 useless extension candidates. Maximal degree in co-relation 459. Up to 962 conditions per place. [2023-08-30 02:31:41,219 INFO L137 encePairwiseOnDemand]: 118/123 looper letters, 16 selfloop transitions, 0 changer transitions 0/28 dead transitions. [2023-08-30 02:31:41,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 28 transitions, 109 flow [2023-08-30 02:31:41,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:31:41,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:31:41,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 127 transitions. [2023-08-30 02:31:41,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2023-08-30 02:31:41,220 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 127 transitions. [2023-08-30 02:31:41,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 127 transitions. [2023-08-30 02:31:41,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:31:41,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 127 transitions. [2023-08-30 02:31:41,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 63.5) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:41,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:41,222 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:41,222 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 93 flow. Second operand 2 states and 127 transitions. [2023-08-30 02:31:41,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 28 transitions, 109 flow [2023-08-30 02:31:41,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 28 transitions, 103 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-30 02:31:41,224 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 71 flow [2023-08-30 02:31:41,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=71, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-08-30 02:31:41,225 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2023-08-30 02:31:41,225 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 71 flow [2023-08-30 02:31:41,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 54.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:41,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:31:41,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:31:41,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 02:31:41,226 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-30 02:31:41,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:31:41,226 INFO L85 PathProgramCache]: Analyzing trace with hash 15287, now seen corresponding path program 1 times [2023-08-30 02:31:41,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:31:41,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373628799] [2023-08-30 02:31:41,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:31:41,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:31:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:31:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:31:41,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:31:41,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373628799] [2023-08-30 02:31:41,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373628799] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:31:41,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:31:41,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:31:41,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144187070] [2023-08-30 02:31:41,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:31:41,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:31:41,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:31:41,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:31:41,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:31:41,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 123 [2023-08-30 02:31:41,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:41,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:31:41,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 123 [2023-08-30 02:31:41,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:31:41,345 INFO L130 PetriNetUnfolder]: 450/952 cut-off events. [2023-08-30 02:31:41,346 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 02:31:41,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1741 conditions, 952 events. 450/952 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6669 event pairs, 450 based on Foata normal form. 0/831 useless extension candidates. Maximal degree in co-relation 1735. Up to 705 conditions per place. [2023-08-30 02:31:41,350 INFO L137 encePairwiseOnDemand]: 121/123 looper letters, 14 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-08-30 02:31:41,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 27 transitions, 99 flow [2023-08-30 02:31:41,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:31:41,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:31:41,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2023-08-30 02:31:41,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2023-08-30 02:31:41,352 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 157 transitions. [2023-08-30 02:31:41,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 157 transitions. [2023-08-30 02:31:41,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:31:41,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 157 transitions. [2023-08-30 02:31:41,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:41,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:41,354 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:41,354 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 71 flow. Second operand 3 states and 157 transitions. [2023-08-30 02:31:41,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 27 transitions, 99 flow [2023-08-30 02:31:41,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 27 transitions, 99 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:31:41,355 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 71 flow [2023-08-30 02:31:41,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2023-08-30 02:31:41,355 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -3 predicate places. [2023-08-30 02:31:41,355 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 71 flow [2023-08-30 02:31:41,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:41,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:31:41,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:31:41,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 02:31:41,356 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-30 02:31:41,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:31:41,356 INFO L85 PathProgramCache]: Analyzing trace with hash 15286, now seen corresponding path program 1 times [2023-08-30 02:31:41,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:31:41,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854410993] [2023-08-30 02:31:41,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:31:41,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:31:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:31:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:31:41,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:31:41,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854410993] [2023-08-30 02:31:41,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854410993] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:31:41,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:31:41,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:31:41,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846642463] [2023-08-30 02:31:41,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:31:41,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:31:41,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:31:41,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:31:41,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:31:41,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 123 [2023-08-30 02:31:41,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:41,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:31:41,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 123 [2023-08-30 02:31:41,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:31:41,430 INFO L130 PetriNetUnfolder]: 279/633 cut-off events. [2023-08-30 02:31:41,430 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 02:31:41,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1168 conditions, 633 events. 279/633 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4106 event pairs, 279 based on Foata normal form. 0/597 useless extension candidates. Maximal degree in co-relation 1161. Up to 449 conditions per place. [2023-08-30 02:31:41,434 INFO L137 encePairwiseOnDemand]: 121/123 looper letters, 13 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-30 02:31:41,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 26 transitions, 97 flow [2023-08-30 02:31:41,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:31:41,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:31:41,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-08-30 02:31:41,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2023-08-30 02:31:41,435 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-08-30 02:31:41,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-08-30 02:31:41,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:31:41,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-08-30 02:31:41,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:41,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:41,436 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:41,436 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 71 flow. Second operand 3 states and 162 transitions. [2023-08-30 02:31:41,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 26 transitions, 97 flow [2023-08-30 02:31:41,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 26 transitions, 96 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:31:41,437 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 70 flow [2023-08-30 02:31:41,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-08-30 02:31:41,438 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -3 predicate places. [2023-08-30 02:31:41,438 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 70 flow [2023-08-30 02:31:41,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:41,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:31:41,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:31:41,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 02:31:41,438 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-30 02:31:41,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:31:41,439 INFO L85 PathProgramCache]: Analyzing trace with hash -27276997, now seen corresponding path program 1 times [2023-08-30 02:31:41,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:31:41,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74189345] [2023-08-30 02:31:41,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:31:41,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:31:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:31:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:31:41,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:31:41,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74189345] [2023-08-30 02:31:41,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74189345] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:31:41,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:31:41,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:31:41,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9630059] [2023-08-30 02:31:41,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:31:41,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:31:41,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:31:41,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:31:41,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:31:41,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 123 [2023-08-30 02:31:41,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:41,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:31:41,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 123 [2023-08-30 02:31:41,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:31:41,596 INFO L130 PetriNetUnfolder]: 966/1762 cut-off events. [2023-08-30 02:31:41,596 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 02:31:41,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3467 conditions, 1762 events. 966/1762 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11516 event pairs, 535 based on Foata normal form. 242/1965 useless extension candidates. Maximal degree in co-relation 3460. Up to 993 conditions per place. [2023-08-30 02:31:41,603 INFO L137 encePairwiseOnDemand]: 113/123 looper letters, 28 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2023-08-30 02:31:41,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 41 transitions, 180 flow [2023-08-30 02:31:41,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:31:41,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:31:41,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2023-08-30 02:31:41,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2023-08-30 02:31:41,604 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2023-08-30 02:31:41,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2023-08-30 02:31:41,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:31:41,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2023-08-30 02:31:41,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:41,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:41,606 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:41,606 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 70 flow. Second operand 3 states and 167 transitions. [2023-08-30 02:31:41,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 41 transitions, 180 flow [2023-08-30 02:31:41,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 41 transitions, 179 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:31:41,608 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 127 flow [2023-08-30 02:31:41,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2023-08-30 02:31:41,609 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2023-08-30 02:31:41,609 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 127 flow [2023-08-30 02:31:41,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:41,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:31:41,611 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:31:41,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 02:31:41,611 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-30 02:31:41,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:31:41,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1487447471, now seen corresponding path program 1 times [2023-08-30 02:31:41,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:31:41,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119220666] [2023-08-30 02:31:41,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:31:41,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:31:41,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:31:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:31:41,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:31:41,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119220666] [2023-08-30 02:31:41,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119220666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:31:41,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:31:41,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:31:41,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627443289] [2023-08-30 02:31:41,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:31:41,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:31:41,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:31:41,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:31:41,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:31:41,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 123 [2023-08-30 02:31:41,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:41,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:31:41,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 123 [2023-08-30 02:31:41,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:31:41,711 INFO L130 PetriNetUnfolder]: 49/233 cut-off events. [2023-08-30 02:31:41,711 INFO L131 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2023-08-30 02:31:41,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533 conditions, 233 events. 49/233 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1147 event pairs, 27 based on Foata normal form. 28/256 useless extension candidates. Maximal degree in co-relation 525. Up to 58 conditions per place. [2023-08-30 02:31:41,712 INFO L137 encePairwiseOnDemand]: 117/123 looper letters, 8 selfloop transitions, 6 changer transitions 0/26 dead transitions. [2023-08-30 02:31:41,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 26 transitions, 135 flow [2023-08-30 02:31:41,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:31:41,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:31:41,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2023-08-30 02:31:41,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2023-08-30 02:31:41,714 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 173 transitions. [2023-08-30 02:31:41,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 173 transitions. [2023-08-30 02:31:41,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:31:41,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 173 transitions. [2023-08-30 02:31:41,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:41,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:41,716 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:41,716 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 127 flow. Second operand 3 states and 173 transitions. [2023-08-30 02:31:41,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 26 transitions, 135 flow [2023-08-30 02:31:41,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 26 transitions, 107 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 02:31:41,719 INFO L231 Difference]: Finished difference. Result has 35 places, 23 transitions, 75 flow [2023-08-30 02:31:41,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=35, PETRI_TRANSITIONS=23} [2023-08-30 02:31:41,720 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -5 predicate places. [2023-08-30 02:31:41,720 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 23 transitions, 75 flow [2023-08-30 02:31:41,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:41,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:31:41,721 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 02:31:41,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 02:31:41,721 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-30 02:31:41,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:31:41,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1510076638, now seen corresponding path program 1 times [2023-08-30 02:31:41,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:31:41,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565054348] [2023-08-30 02:31:41,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:31:41,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:31:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:31:41,733 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:31:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:31:41,742 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:31:41,742 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:31:41,743 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-08-30 02:31:41,743 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2023-08-30 02:31:41,743 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-08-30 02:31:41,743 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-08-30 02:31:41,743 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2023-08-30 02:31:41,743 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-08-30 02:31:41,743 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2023-08-30 02:31:41,744 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2023-08-30 02:31:41,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 02:31:41,744 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-30 02:31:41,744 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:31:41,744 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 02:31:41,760 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:31:41,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 83 transitions, 198 flow [2023-08-30 02:31:41,771 INFO L130 PetriNetUnfolder]: 9/149 cut-off events. [2023-08-30 02:31:41,771 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 02:31:41,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 149 events. 9/149 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 359 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 127. Up to 10 conditions per place. [2023-08-30 02:31:41,772 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 83 transitions, 198 flow [2023-08-30 02:31:41,772 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 83 transitions, 198 flow [2023-08-30 02:31:41,773 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:31:41,773 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 87 places, 83 transitions, 198 flow [2023-08-30 02:31:41,773 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 87 places, 83 transitions, 198 flow [2023-08-30 02:31:41,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 83 transitions, 198 flow [2023-08-30 02:31:41,791 INFO L130 PetriNetUnfolder]: 9/149 cut-off events. [2023-08-30 02:31:41,791 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 02:31:41,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 149 events. 9/149 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 359 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 127. Up to 10 conditions per place. [2023-08-30 02:31:41,794 INFO L119 LiptonReduction]: Number of co-enabled transitions 3600 [2023-08-30 02:31:42,729 INFO L134 LiptonReduction]: Checked pairs total: 15303 [2023-08-30 02:31:42,729 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-08-30 02:31:42,730 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:31:42,731 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;@19a9c22c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:31:42,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-30 02:31:42,731 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:31:42,732 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:31:42,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:31:42,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:31:42,732 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 02:31:42,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:31:42,732 INFO L85 PathProgramCache]: Analyzing trace with hash 20311, now seen corresponding path program 1 times [2023-08-30 02:31:42,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:31:42,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344674818] [2023-08-30 02:31:42,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:31:42,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:31:42,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:31:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:31:42,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:31:42,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344674818] [2023-08-30 02:31:42,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344674818] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:31:42,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:31:42,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:31:42,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902760821] [2023-08-30 02:31:42,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:31:42,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:31:42,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:31:42,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:31:42,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:31:42,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 143 [2023-08-30 02:31:42,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:42,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:31:42,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 143 [2023-08-30 02:31:42,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:31:43,039 INFO L130 PetriNetUnfolder]: 2562/4587 cut-off events. [2023-08-30 02:31:43,039 INFO L131 PetriNetUnfolder]: For 1054/1054 co-relation queries the response was YES. [2023-08-30 02:31:43,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8832 conditions, 4587 events. 2562/4587 cut-off events. For 1054/1054 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 36118 event pairs, 2562 based on Foata normal form. 937/5032 useless extension candidates. Maximal degree in co-relation 1820. Up to 3585 conditions per place. [2023-08-30 02:31:43,062 INFO L137 encePairwiseOnDemand]: 135/143 looper letters, 18 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-08-30 02:31:43,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 35 transitions, 140 flow [2023-08-30 02:31:43,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:31:43,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:31:43,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2023-08-30 02:31:43,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4592074592074592 [2023-08-30 02:31:43,064 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 197 transitions. [2023-08-30 02:31:43,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 197 transitions. [2023-08-30 02:31:43,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:31:43,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 197 transitions. [2023-08-30 02:31:43,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:43,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 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) [2023-08-30 02:31:43,065 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 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) [2023-08-30 02:31:43,065 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 122 flow. Second operand 3 states and 197 transitions. [2023-08-30 02:31:43,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 35 transitions, 140 flow [2023-08-30 02:31:43,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 35 transitions, 128 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-30 02:31:43,067 INFO L231 Difference]: Finished difference. Result has 46 places, 35 transitions, 92 flow [2023-08-30 02:31:43,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=46, PETRI_TRANSITIONS=35} [2023-08-30 02:31:43,068 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2023-08-30 02:31:43,068 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 35 transitions, 92 flow [2023-08-30 02:31:43,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:43,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:31:43,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:31:43,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 02:31:43,068 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 02:31:43,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:31:43,069 INFO L85 PathProgramCache]: Analyzing trace with hash 20313, now seen corresponding path program 1 times [2023-08-30 02:31:43,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:31:43,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277480965] [2023-08-30 02:31:43,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:31:43,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:31:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:31:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:31:43,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:31:43,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277480965] [2023-08-30 02:31:43,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277480965] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:31:43,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:31:43,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:31:43,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171298705] [2023-08-30 02:31:43,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:31:43,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:31:43,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:31:43,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:31:43,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:31:43,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 143 [2023-08-30 02:31:43,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 35 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:43,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:31:43,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 143 [2023-08-30 02:31:43,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:31:43,271 INFO L130 PetriNetUnfolder]: 1623/3051 cut-off events. [2023-08-30 02:31:43,272 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-30 02:31:43,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5682 conditions, 3051 events. 1623/3051 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 23181 event pairs, 1623 based on Foata normal form. 0/2901 useless extension candidates. Maximal degree in co-relation 5672. Up to 2305 conditions per place. [2023-08-30 02:31:43,289 INFO L137 encePairwiseOnDemand]: 141/143 looper letters, 17 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-08-30 02:31:43,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 34 transitions, 126 flow [2023-08-30 02:31:43,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:31:43,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:31:43,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2023-08-30 02:31:43,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289044289044289 [2023-08-30 02:31:43,290 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2023-08-30 02:31:43,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2023-08-30 02:31:43,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:31:43,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2023-08-30 02:31:43,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:43,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 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) [2023-08-30 02:31:43,292 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 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) [2023-08-30 02:31:43,292 INFO L175 Difference]: Start difference. First operand has 46 places, 35 transitions, 92 flow. Second operand 3 states and 184 transitions. [2023-08-30 02:31:43,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 34 transitions, 126 flow [2023-08-30 02:31:43,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 34 transitions, 125 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:31:43,293 INFO L231 Difference]: Finished difference. Result has 46 places, 34 transitions, 91 flow [2023-08-30 02:31:43,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=46, PETRI_TRANSITIONS=34} [2023-08-30 02:31:43,295 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2023-08-30 02:31:43,295 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 34 transitions, 91 flow [2023-08-30 02:31:43,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:43,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:31:43,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:31:43,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 02:31:43,295 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 02:31:43,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:31:43,296 INFO L85 PathProgramCache]: Analyzing trace with hash -2082013692, now seen corresponding path program 1 times [2023-08-30 02:31:43,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:31:43,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712055143] [2023-08-30 02:31:43,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:31:43,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:31:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:31:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:31:43,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:31:43,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712055143] [2023-08-30 02:31:43,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712055143] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:31:43,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:31:43,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:31:43,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772580220] [2023-08-30 02:31:43,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:31:43,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:31:43,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:31:43,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:31:43,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:31:43,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 143 [2023-08-30 02:31:43,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 34 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:43,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:31:43,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 143 [2023-08-30 02:31:43,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:31:44,330 INFO L130 PetriNetUnfolder]: 10745/16935 cut-off events. [2023-08-30 02:31:44,331 INFO L131 PetriNetUnfolder]: For 913/913 co-relation queries the response was YES. [2023-08-30 02:31:44,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33438 conditions, 16935 events. 10745/16935 cut-off events. For 913/913 co-relation queries the response was YES. Maximal size of possible extension queue 1130. Compared 131131 event pairs, 5857 based on Foata normal form. 2212/18634 useless extension candidates. Maximal degree in co-relation 33427. Up to 9097 conditions per place. [2023-08-30 02:31:44,424 INFO L137 encePairwiseOnDemand]: 129/143 looper letters, 38 selfloop transitions, 9 changer transitions 0/54 dead transitions. [2023-08-30 02:31:44,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 54 transitions, 240 flow [2023-08-30 02:31:44,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:31:44,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:31:44,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 196 transitions. [2023-08-30 02:31:44,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4568764568764569 [2023-08-30 02:31:44,425 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 196 transitions. [2023-08-30 02:31:44,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 196 transitions. [2023-08-30 02:31:44,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:31:44,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 196 transitions. [2023-08-30 02:31:44,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:44,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 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) [2023-08-30 02:31:44,428 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 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) [2023-08-30 02:31:44,428 INFO L175 Difference]: Start difference. First operand has 46 places, 34 transitions, 91 flow. Second operand 3 states and 196 transitions. [2023-08-30 02:31:44,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 54 transitions, 240 flow [2023-08-30 02:31:44,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 54 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:31:44,430 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 168 flow [2023-08-30 02:31:44,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2023-08-30 02:31:44,431 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2023-08-30 02:31:44,431 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 168 flow [2023-08-30 02:31:44,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:44,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:31:44,431 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:31:44,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 02:31:44,431 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 02:31:44,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:31:44,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1350320129, now seen corresponding path program 1 times [2023-08-30 02:31:44,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:31:44,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743863119] [2023-08-30 02:31:44,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:31:44,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:31:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:31:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:31:44,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:31:44,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743863119] [2023-08-30 02:31:44,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743863119] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:31:44,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:31:44,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:31:44,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530710798] [2023-08-30 02:31:44,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:31:44,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:31:44,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:31:44,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:31:44,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:31:44,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 143 [2023-08-30 02:31:44,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:44,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:31:44,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 143 [2023-08-30 02:31:44,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:31:44,559 INFO L130 PetriNetUnfolder]: 149/641 cut-off events. [2023-08-30 02:31:44,559 INFO L131 PetriNetUnfolder]: For 177/177 co-relation queries the response was YES. [2023-08-30 02:31:44,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1457 conditions, 641 events. 149/641 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4248 event pairs, 83 based on Foata normal form. 124/748 useless extension candidates. Maximal degree in co-relation 1443. Up to 164 conditions per place. [2023-08-30 02:31:44,561 INFO L137 encePairwiseOnDemand]: 135/143 looper letters, 10 selfloop transitions, 8 changer transitions 0/33 dead transitions. [2023-08-30 02:31:44,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 33 transitions, 175 flow [2023-08-30 02:31:44,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:31:44,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:31:44,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 202 transitions. [2023-08-30 02:31:44,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47086247086247085 [2023-08-30 02:31:44,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 202 transitions. [2023-08-30 02:31:44,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 202 transitions. [2023-08-30 02:31:44,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:31:44,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 202 transitions. [2023-08-30 02:31:44,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:44,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 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) [2023-08-30 02:31:44,564 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 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) [2023-08-30 02:31:44,564 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 168 flow. Second operand 3 states and 202 transitions. [2023-08-30 02:31:44,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 33 transitions, 175 flow [2023-08-30 02:31:44,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 33 transitions, 139 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 02:31:44,566 INFO L231 Difference]: Finished difference. Result has 42 places, 29 transitions, 96 flow [2023-08-30 02:31:44,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=42, PETRI_TRANSITIONS=29} [2023-08-30 02:31:44,566 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -8 predicate places. [2023-08-30 02:31:44,566 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 29 transitions, 96 flow [2023-08-30 02:31:44,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:44,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:31:44,567 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 02:31:44,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 02:31:44,567 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 02:31:44,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:31:44,567 INFO L85 PathProgramCache]: Analyzing trace with hash 390562527, now seen corresponding path program 1 times [2023-08-30 02:31:44,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:31:44,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251157057] [2023-08-30 02:31:44,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:31:44,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:31:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:31:44,578 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:31:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:31:44,590 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:31:44,590 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:31:44,590 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-08-30 02:31:44,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (7 of 9 remaining) [2023-08-30 02:31:44,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-08-30 02:31:44,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-08-30 02:31:44,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (4 of 9 remaining) [2023-08-30 02:31:44,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2023-08-30 02:31:44,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2023-08-30 02:31:44,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 9 remaining) [2023-08-30 02:31:44,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2023-08-30 02:31:44,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 02:31:44,591 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-30 02:31:44,593 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:31:44,593 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 02:31:44,609 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:31:44,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 96 transitions, 237 flow [2023-08-30 02:31:44,623 INFO L130 PetriNetUnfolder]: 11/179 cut-off events. [2023-08-30 02:31:44,624 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 02:31:44,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 179 events. 11/179 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 449 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 162. Up to 12 conditions per place. [2023-08-30 02:31:44,624 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 96 transitions, 237 flow [2023-08-30 02:31:44,625 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 96 transitions, 237 flow [2023-08-30 02:31:44,625 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:31:44,625 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 101 places, 96 transitions, 237 flow [2023-08-30 02:31:44,625 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 101 places, 96 transitions, 237 flow [2023-08-30 02:31:44,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 96 transitions, 237 flow [2023-08-30 02:31:44,632 INFO L130 PetriNetUnfolder]: 11/179 cut-off events. [2023-08-30 02:31:44,632 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 02:31:44,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 179 events. 11/179 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 449 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 162. Up to 12 conditions per place. [2023-08-30 02:31:44,635 INFO L119 LiptonReduction]: Number of co-enabled transitions 5280 [2023-08-30 02:31:45,733 INFO L134 LiptonReduction]: Checked pairs total: 23495 [2023-08-30 02:31:45,734 INFO L136 LiptonReduction]: Total number of compositions: 69 [2023-08-30 02:31:45,735 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:31:45,735 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;@19a9c22c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:31:45,735 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-30 02:31:45,736 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:31:45,736 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:31:45,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:31:45,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:31:45,736 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 02:31:45,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:31:45,737 INFO L85 PathProgramCache]: Analyzing trace with hash 26007, now seen corresponding path program 1 times [2023-08-30 02:31:45,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:31:45,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976898484] [2023-08-30 02:31:45,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:31:45,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:31:45,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:31:45,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:31:45,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:31:45,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976898484] [2023-08-30 02:31:45,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976898484] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:31:45,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:31:45,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:31:45,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682980993] [2023-08-30 02:31:45,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:31:45,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:31:45,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:31:45,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:31:45,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:31:45,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 165 [2023-08-30 02:31:45,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:45,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:31:45,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 165 [2023-08-30 02:31:45,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:31:47,090 INFO L130 PetriNetUnfolder]: 13314/21416 cut-off events. [2023-08-30 02:31:47,090 INFO L131 PetriNetUnfolder]: For 6750/6750 co-relation queries the response was YES. [2023-08-30 02:31:47,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42046 conditions, 21416 events. 13314/21416 cut-off events. For 6750/6750 co-relation queries the response was YES. Maximal size of possible extension queue 1380. Compared 181590 event pairs, 13314 based on Foata normal form. 4779/24234 useless extension candidates. Maximal degree in co-relation 8972. Up to 17409 conditions per place. [2023-08-30 02:31:47,310 INFO L137 encePairwiseOnDemand]: 156/165 looper letters, 22 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-30 02:31:47,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 41 transitions, 173 flow [2023-08-30 02:31:47,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:31:47,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:31:47,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2023-08-30 02:31:47,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45656565656565656 [2023-08-30 02:31:47,312 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2023-08-30 02:31:47,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2023-08-30 02:31:47,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:31:47,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2023-08-30 02:31:47,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:47,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:47,315 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:47,315 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 153 flow. Second operand 3 states and 226 transitions. [2023-08-30 02:31:47,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 41 transitions, 173 flow [2023-08-30 02:31:47,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 41 transitions, 153 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-08-30 02:31:47,320 INFO L231 Difference]: Finished difference. Result has 54 places, 41 transitions, 109 flow [2023-08-30 02:31:47,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=54, PETRI_TRANSITIONS=41} [2023-08-30 02:31:47,321 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -6 predicate places. [2023-08-30 02:31:47,321 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 41 transitions, 109 flow [2023-08-30 02:31:47,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:47,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:31:47,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:31:47,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 02:31:47,321 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 02:31:47,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:31:47,322 INFO L85 PathProgramCache]: Analyzing trace with hash 26008, now seen corresponding path program 1 times [2023-08-30 02:31:47,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:31:47,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45803402] [2023-08-30 02:31:47,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:31:47,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:31:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:31:47,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:31:47,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:31:47,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45803402] [2023-08-30 02:31:47,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45803402] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:31:47,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:31:47,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:31:47,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441643694] [2023-08-30 02:31:47,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:31:47,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:31:47,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:31:47,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:31:47,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:31:47,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 165 [2023-08-30 02:31:47,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:47,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:31:47,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 165 [2023-08-30 02:31:47,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:31:48,141 INFO L130 PetriNetUnfolder]: 8535/14249 cut-off events. [2023-08-30 02:31:48,141 INFO L131 PetriNetUnfolder]: For 850/850 co-relation queries the response was YES. [2023-08-30 02:31:48,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26801 conditions, 14249 events. 8535/14249 cut-off events. For 850/850 co-relation queries the response was YES. Maximal size of possible extension queue 936. Compared 119314 event pairs, 8535 based on Foata normal form. 0/13653 useless extension candidates. Maximal degree in co-relation 26790. Up to 11265 conditions per place. [2023-08-30 02:31:48,200 INFO L137 encePairwiseOnDemand]: 163/165 looper letters, 21 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-30 02:31:48,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 40 transitions, 151 flow [2023-08-30 02:31:48,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:31:48,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:31:48,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 212 transitions. [2023-08-30 02:31:48,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42828282828282827 [2023-08-30 02:31:48,201 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 212 transitions. [2023-08-30 02:31:48,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 212 transitions. [2023-08-30 02:31:48,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:31:48,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 212 transitions. [2023-08-30 02:31:48,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:48,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:48,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:48,203 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 109 flow. Second operand 3 states and 212 transitions. [2023-08-30 02:31:48,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 40 transitions, 151 flow [2023-08-30 02:31:48,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 40 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:31:48,204 INFO L231 Difference]: Finished difference. Result has 54 places, 40 transitions, 108 flow [2023-08-30 02:31:48,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=54, PETRI_TRANSITIONS=40} [2023-08-30 02:31:48,204 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -6 predicate places. [2023-08-30 02:31:48,204 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 40 transitions, 108 flow [2023-08-30 02:31:48,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:48,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:31:48,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:31:48,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 02:31:48,204 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 02:31:48,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:31:48,205 INFO L85 PathProgramCache]: Analyzing trace with hash -2030555774, now seen corresponding path program 1 times [2023-08-30 02:31:48,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:31:48,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14248524] [2023-08-30 02:31:48,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:31:48,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:31:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:31:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:31:48,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:31:48,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14248524] [2023-08-30 02:31:48,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14248524] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:31:48,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:31:48,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:31:48,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219777629] [2023-08-30 02:31:48,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:31:48,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:31:48,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:31:48,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:31:48,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:31:48,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 165 [2023-08-30 02:31:48,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 40 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:48,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:31:48,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 165 [2023-08-30 02:31:48,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:31:54,405 INFO L130 PetriNetUnfolder]: 84206/120198 cut-off events. [2023-08-30 02:31:54,405 INFO L131 PetriNetUnfolder]: For 5676/5676 co-relation queries the response was YES. [2023-08-30 02:31:54,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238434 conditions, 120198 events. 84206/120198 cut-off events. For 5676/5676 co-relation queries the response was YES. Maximal size of possible extension queue 6117. Compared 970288 event pairs, 44681 based on Foata normal form. 14930/133185 useless extension candidates. Maximal degree in co-relation 238422. Up to 62881 conditions per place. [2023-08-30 02:31:55,251 INFO L137 encePairwiseOnDemand]: 149/165 looper letters, 46 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2023-08-30 02:31:55,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 65 transitions, 292 flow [2023-08-30 02:31:55,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:31:55,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:31:55,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2023-08-30 02:31:55,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44646464646464645 [2023-08-30 02:31:55,253 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2023-08-30 02:31:55,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2023-08-30 02:31:55,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:31:55,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2023-08-30 02:31:55,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:55,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:55,254 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:55,254 INFO L175 Difference]: Start difference. First operand has 54 places, 40 transitions, 108 flow. Second operand 3 states and 221 transitions. [2023-08-30 02:31:55,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 65 transitions, 292 flow [2023-08-30 02:31:55,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 65 transitions, 291 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:31:55,263 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 201 flow [2023-08-30 02:31:55,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2023-08-30 02:31:55,263 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -3 predicate places. [2023-08-30 02:31:55,263 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 201 flow [2023-08-30 02:31:55,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:55,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:31:55,264 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:31:55,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 02:31:55,264 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 02:31:55,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:31:55,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1324128266, now seen corresponding path program 1 times [2023-08-30 02:31:55,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:31:55,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652496791] [2023-08-30 02:31:55,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:31:55,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:31:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:31:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:31:55,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:31:55,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652496791] [2023-08-30 02:31:55,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652496791] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:31:55,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:31:55,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:31:55,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795605691] [2023-08-30 02:31:55,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:31:55,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:31:55,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:31:55,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:31:55,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:31:55,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 165 [2023-08-30 02:31:55,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:55,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:31:55,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 165 [2023-08-30 02:31:55,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:31:55,383 INFO L130 PetriNetUnfolder]: 405/1641 cut-off events. [2023-08-30 02:31:55,383 INFO L131 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2023-08-30 02:31:55,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3730 conditions, 1641 events. 405/1641 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 13518 event pairs, 227 based on Foata normal form. 444/2036 useless extension candidates. Maximal degree in co-relation 3715. Up to 436 conditions per place. [2023-08-30 02:31:55,387 INFO L137 encePairwiseOnDemand]: 155/165 looper letters, 12 selfloop transitions, 10 changer transitions 0/40 dead transitions. [2023-08-30 02:31:55,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 40 transitions, 215 flow [2023-08-30 02:31:55,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:31:55,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:31:55,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2023-08-30 02:31:55,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-08-30 02:31:55,388 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 231 transitions. [2023-08-30 02:31:55,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 231 transitions. [2023-08-30 02:31:55,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:31:55,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 231 transitions. [2023-08-30 02:31:55,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:55,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:55,390 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:55,390 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 201 flow. Second operand 3 states and 231 transitions. [2023-08-30 02:31:55,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 40 transitions, 215 flow [2023-08-30 02:31:55,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 40 transitions, 171 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 02:31:55,393 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 117 flow [2023-08-30 02:31:55,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2023-08-30 02:31:55,394 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -10 predicate places. [2023-08-30 02:31:55,394 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 117 flow [2023-08-30 02:31:55,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:55,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:31:55,394 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:31:55,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 02:31:55,394 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 02:31:55,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:31:55,395 INFO L85 PathProgramCache]: Analyzing trace with hash 242291544, now seen corresponding path program 1 times [2023-08-30 02:31:55,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:31:55,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942206276] [2023-08-30 02:31:55,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:31:55,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:31:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:31:55,403 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:31:55,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:31:55,410 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:31:55,410 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:31:55,410 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-08-30 02:31:55,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (8 of 10 remaining) [2023-08-30 02:31:55,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-08-30 02:31:55,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-08-30 02:31:55,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (5 of 10 remaining) [2023-08-30 02:31:55,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2023-08-30 02:31:55,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-08-30 02:31:55,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2023-08-30 02:31:55,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2023-08-30 02:31:55,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2023-08-30 02:31:55,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 02:31:55,411 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-30 02:31:55,412 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:31:55,412 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-30 02:31:55,423 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:31:55,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 109 transitions, 278 flow [2023-08-30 02:31:55,433 INFO L130 PetriNetUnfolder]: 13/209 cut-off events. [2023-08-30 02:31:55,434 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 02:31:55,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 209 events. 13/209 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 533 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 199. Up to 14 conditions per place. [2023-08-30 02:31:55,435 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 109 transitions, 278 flow [2023-08-30 02:31:55,435 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 109 transitions, 278 flow [2023-08-30 02:31:55,435 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:31:55,435 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 109 transitions, 278 flow [2023-08-30 02:31:55,436 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 109 transitions, 278 flow [2023-08-30 02:31:55,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 109 transitions, 278 flow [2023-08-30 02:31:55,444 INFO L130 PetriNetUnfolder]: 13/209 cut-off events. [2023-08-30 02:31:55,445 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 02:31:55,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 209 events. 13/209 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 533 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 199. Up to 14 conditions per place. [2023-08-30 02:31:55,449 INFO L119 LiptonReduction]: Number of co-enabled transitions 7272 [2023-08-30 02:31:56,576 INFO L134 LiptonReduction]: Checked pairs total: 31776 [2023-08-30 02:31:56,576 INFO L136 LiptonReduction]: Total number of compositions: 74 [2023-08-30 02:31:56,577 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:31:56,577 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;@19a9c22c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:31:56,577 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-30 02:31:56,578 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:31:56,578 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:31:56,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:31:56,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:31:56,578 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 02:31:56,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:31:56,578 INFO L85 PathProgramCache]: Analyzing trace with hash 32274, now seen corresponding path program 1 times [2023-08-30 02:31:56,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:31:56,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008229435] [2023-08-30 02:31:56,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:31:56,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:31:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:31:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:31:56,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:31:56,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008229435] [2023-08-30 02:31:56,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008229435] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:31:56,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:31:56,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:31:56,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528369504] [2023-08-30 02:31:56,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:31:56,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:31:56,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:31:56,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:31:56,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:31:56,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 183 [2023-08-30 02:31:56,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:31:56,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:31:56,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 183 [2023-08-30 02:31:56,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:32:03,865 INFO L130 PetriNetUnfolder]: 79106/112488 cut-off events. [2023-08-30 02:32:03,865 INFO L131 PetriNetUnfolder]: For 39518/39518 co-relation queries the response was YES. [2023-08-30 02:32:04,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226303 conditions, 112488 events. 79106/112488 cut-off events. For 39518/39518 co-relation queries the response was YES. Maximal size of possible extension queue 5897. Compared 938737 event pairs, 79106 based on Foata normal form. 23339/122922 useless extension candidates. Maximal degree in co-relation 49276. Up to 98561 conditions per place. [2023-08-30 02:32:04,614 INFO L137 encePairwiseOnDemand]: 174/183 looper letters, 27 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-08-30 02:32:04,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 50 transitions, 216 flow [2023-08-30 02:32:04,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:32:04,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:32:04,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 255 transitions. [2023-08-30 02:32:04,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4644808743169399 [2023-08-30 02:32:04,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 255 transitions. [2023-08-30 02:32:04,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 255 transitions. [2023-08-30 02:32:04,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:32:04,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 255 transitions. [2023-08-30 02:32:04,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:32:04,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:32:04,617 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:32:04,617 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 182 flow. Second operand 3 states and 255 transitions. [2023-08-30 02:32:04,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 50 transitions, 216 flow [2023-08-30 02:32:04,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 50 transitions, 186 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-08-30 02:32:04,659 INFO L231 Difference]: Finished difference. Result has 65 places, 50 transitions, 132 flow [2023-08-30 02:32:04,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=65, PETRI_TRANSITIONS=50} [2023-08-30 02:32:04,660 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -4 predicate places. [2023-08-30 02:32:04,660 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 50 transitions, 132 flow [2023-08-30 02:32:04,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:32:04,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:32:04,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:32:04,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-30 02:32:04,661 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 02:32:04,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:32:04,661 INFO L85 PathProgramCache]: Analyzing trace with hash 32276, now seen corresponding path program 1 times [2023-08-30 02:32:04,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:32:04,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776469868] [2023-08-30 02:32:04,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:32:04,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:32:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:32:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:32:04,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:32:04,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776469868] [2023-08-30 02:32:04,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776469868] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:32:04,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:32:04,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:32:04,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337249533] [2023-08-30 02:32:04,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:32:04,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:32:04,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:32:04,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:32:04,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:32:04,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 183 [2023-08-30 02:32:04,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 50 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:32:04,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:32:04,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 183 [2023-08-30 02:32:04,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:32:09,470 INFO L130 PetriNetUnfolder]: 51031/74537 cut-off events. [2023-08-30 02:32:09,470 INFO L131 PetriNetUnfolder]: For 3410/3410 co-relation queries the response was YES. [2023-08-30 02:32:09,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143666 conditions, 74537 events. 51031/74537 cut-off events. For 3410/3410 co-relation queries the response was YES. Maximal size of possible extension queue 3970. Compared 618878 event pairs, 51031 based on Foata normal form. 0/69461 useless extension candidates. Maximal degree in co-relation 143654. Up to 64001 conditions per place. [2023-08-30 02:32:09,916 INFO L137 encePairwiseOnDemand]: 181/183 looper letters, 26 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-08-30 02:32:09,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 49 transitions, 184 flow [2023-08-30 02:32:09,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:32:09,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:32:09,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 241 transitions. [2023-08-30 02:32:09,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43897996357012753 [2023-08-30 02:32:09,917 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 241 transitions. [2023-08-30 02:32:09,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 241 transitions. [2023-08-30 02:32:09,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:32:09,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 241 transitions. [2023-08-30 02:32:09,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:32:09,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:32:09,918 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:32:09,918 INFO L175 Difference]: Start difference. First operand has 65 places, 50 transitions, 132 flow. Second operand 3 states and 241 transitions. [2023-08-30 02:32:09,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 49 transitions, 184 flow [2023-08-30 02:32:09,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 49 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:32:09,929 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 131 flow [2023-08-30 02:32:09,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=65, PETRI_TRANSITIONS=49} [2023-08-30 02:32:09,929 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -4 predicate places. [2023-08-30 02:32:09,930 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 131 flow [2023-08-30 02:32:09,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:32:09,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:32:09,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:32:09,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-30 02:32:09,930 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 02:32:09,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:32:09,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1447023613, now seen corresponding path program 1 times [2023-08-30 02:32:09,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:32:09,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647995966] [2023-08-30 02:32:09,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:32:09,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:32:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:32:09,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:32:09,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:32:09,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647995966] [2023-08-30 02:32:09,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647995966] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:32:09,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:32:09,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:32:09,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859520484] [2023-08-30 02:32:09,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:32:09,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:32:09,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:32:09,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:32:09,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:32:09,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 183 [2023-08-30 02:32:09,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 49 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:32:09,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:32:09,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 183 [2023-08-30 02:32:09,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand