./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:24:11,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:24:11,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:24:11,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:24:11,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:24:11,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:24:11,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:24:11,775 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:24:11,776 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:24:11,781 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:24:11,781 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:24:11,783 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:24:11,783 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:24:11,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:24:11,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:24:11,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:24:11,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:24:11,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:24:11,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:24:11,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:24:11,796 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:24:11,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:24:11,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:24:11,798 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:24:11,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:24:11,803 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:24:11,803 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:24:11,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:24:11,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:24:11,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:24:11,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:24:11,805 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:24:11,807 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:24:11,807 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:24:11,807 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:24:11,808 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:24:11,808 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:24:11,809 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:24:11,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:24:11,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:24:11,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:24:11,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:24:11,812 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:24:11,836 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:24:11,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:24:11,837 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:24:11,837 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:24:11,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:24:11,838 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:24:11,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:24:11,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:24:11,839 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:24:11,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:24:11,840 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:24:11,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:24:11,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:24:11,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:24:11,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:24:11,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:24:11,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:24:11,841 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:24:11,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:24:11,842 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:24:11,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:24:11,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:24:11,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:24:11,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:24:11,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:24:11,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:24:11,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:24:11,843 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:24:11,843 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:24:11,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:24:11,844 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:24:11,844 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:24:11,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:24:11,844 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 [2022-07-12 10:24:12,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:24:12,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:24:12,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:24:12,061 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:24:12,062 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:24:12,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2022-07-12 10:24:12,106 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f4e2de21/c5a2cc5214774bc89e19e17805770d18/FLAG8c49612e9 [2022-07-12 10:24:12,457 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:24:12,457 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2022-07-12 10:24:12,462 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f4e2de21/c5a2cc5214774bc89e19e17805770d18/FLAG8c49612e9 [2022-07-12 10:24:12,474 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f4e2de21/c5a2cc5214774bc89e19e17805770d18 [2022-07-12 10:24:12,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:24:12,477 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:24:12,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:24:12,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:24:12,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:24:12,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:24:12" (1/1) ... [2022-07-12 10:24:12,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37ec04ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:24:12, skipping insertion in model container [2022-07-12 10:24:12,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:24:12" (1/1) ... [2022-07-12 10:24:12,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:24:12,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:24:12,710 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2022-07-12 10:24:12,722 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:24:12,729 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:24:12,761 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2022-07-12 10:24:12,768 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:24:12,782 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:24:12,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:24:12 WrapperNode [2022-07-12 10:24:12,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:24:12,784 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:24:12,784 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:24:12,784 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:24:12,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:24:12" (1/1) ... [2022-07-12 10:24:12,807 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:24:12" (1/1) ... [2022-07-12 10:24:12,837 INFO L137 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 278 [2022-07-12 10:24:12,838 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:24:12,838 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:24:12,838 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:24:12,838 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:24:12,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:24:12" (1/1) ... [2022-07-12 10:24:12,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:24:12" (1/1) ... [2022-07-12 10:24:12,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:24:12" (1/1) ... [2022-07-12 10:24:12,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:24:12" (1/1) ... [2022-07-12 10:24:12,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:24:12" (1/1) ... [2022-07-12 10:24:12,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:24:12" (1/1) ... [2022-07-12 10:24:12,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:24:12" (1/1) ... [2022-07-12 10:24:12,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:24:12,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:24:12,884 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:24:12,884 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:24:12,885 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:24:12" (1/1) ... [2022-07-12 10:24:12,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:24:12,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:24:12,906 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) [2022-07-12 10:24:12,912 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 [2022-07-12 10:24:12,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:24:12,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:24:12,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:24:12,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:24:12,935 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:24:12,935 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:24:12,935 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:24:12,935 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:24:12,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:24:12,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 10:24:12,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:24:12,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:24:12,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:24:12,937 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:24:13,002 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:24:13,003 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:24:13,381 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:24:13,389 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:24:13,390 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 10:24:13,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:24:13 BoogieIcfgContainer [2022-07-12 10:24:13,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:24:13,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:24:13,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:24:13,402 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:24:13,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:24:12" (1/3) ... [2022-07-12 10:24:13,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56c93ffb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:24:13, skipping insertion in model container [2022-07-12 10:24:13,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:24:12" (2/3) ... [2022-07-12 10:24:13,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56c93ffb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:24:13, skipping insertion in model container [2022-07-12 10:24:13,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:24:13" (3/3) ... [2022-07-12 10:24:13,404 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2022-07-12 10:24:13,408 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:24:13,414 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:24:13,415 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:24:13,415 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:24:13,500 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 10:24:13,570 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 325 places, 353 transitions, 722 flow [2022-07-12 10:24:13,678 INFO L129 PetriNetUnfolder]: 35/351 cut-off events. [2022-07-12 10:24:13,678 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:24:13,685 INFO L84 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 351 events. 35/351 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 735 event pairs, 0 based on Foata normal form. 0/315 useless extension candidates. Maximal degree in co-relation 211. Up to 2 conditions per place. [2022-07-12 10:24:13,686 INFO L82 GeneralOperation]: Start removeDead. Operand has 325 places, 353 transitions, 722 flow [2022-07-12 10:24:13,692 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 314 places, 342 transitions, 696 flow [2022-07-12 10:24:13,700 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:24:13,708 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1370e271, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@9d4d6c8 [2022-07-12 10:24:13,709 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-12 10:24:13,780 INFO L129 PetriNetUnfolder]: 35/341 cut-off events. [2022-07-12 10:24:13,780 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:24:13,781 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:24:13,781 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:24:13,782 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:24:13,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:24:13,785 INFO L85 PathProgramCache]: Analyzing trace with hash 400884361, now seen corresponding path program 1 times [2022-07-12 10:24:13,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:24:13,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213057632] [2022-07-12 10:24:13,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:13,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:24:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:24:14,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:24:14,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213057632] [2022-07-12 10:24:14,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213057632] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:24:14,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:24:14,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:24:14,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390036006] [2022-07-12 10:24:14,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:24:14,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:24:14,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:24:14,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:24:14,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:24:14,064 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 353 [2022-07-12 10:24:14,069 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 342 transitions, 696 flow. Second operand has 2 states, 2 states have (on average 337.0) internal successors, (674), 2 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:14,069 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:24:14,070 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 353 [2022-07-12 10:24:14,071 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:24:14,152 INFO L129 PetriNetUnfolder]: 21/328 cut-off events. [2022-07-12 10:24:14,152 INFO L130 PetriNetUnfolder]: For 8/9 co-relation queries the response was YES. [2022-07-12 10:24:14,156 INFO L84 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 328 events. 21/328 cut-off events. For 8/9 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 709 event pairs, 0 based on Foata normal form. 17/313 useless extension candidates. Maximal degree in co-relation 202. Up to 5 conditions per place. [2022-07-12 10:24:14,158 INFO L132 encePairwiseOnDemand]: 339/353 looper letters, 4 selfloop transitions, 0 changer transitions 3/328 dead transitions. [2022-07-12 10:24:14,158 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 328 transitions, 676 flow [2022-07-12 10:24:14,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:24:14,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:24:14,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 686 transitions. [2022-07-12 10:24:14,179 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9716713881019831 [2022-07-12 10:24:14,180 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 686 transitions. [2022-07-12 10:24:14,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 686 transitions. [2022-07-12 10:24:14,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:24:14,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 686 transitions. [2022-07-12 10:24:14,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 343.0) internal successors, (686), 2 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:14,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 353.0) internal successors, (1059), 3 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:14,198 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 353.0) internal successors, (1059), 3 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:14,199 INFO L186 Difference]: Start difference. First operand has 314 places, 342 transitions, 696 flow. Second operand 2 states and 686 transitions. [2022-07-12 10:24:14,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 328 transitions, 676 flow [2022-07-12 10:24:14,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 328 transitions, 668 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:24:14,212 INFO L242 Difference]: Finished difference. Result has 311 places, 325 transitions, 654 flow [2022-07-12 10:24:14,213 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=654, PETRI_PLACES=311, PETRI_TRANSITIONS=325} [2022-07-12 10:24:14,219 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, -3 predicate places. [2022-07-12 10:24:14,219 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 325 transitions, 654 flow [2022-07-12 10:24:14,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 337.0) internal successors, (674), 2 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:14,220 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:24:14,220 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:24:14,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:24:14,221 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:24:14,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:24:14,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1831147785, now seen corresponding path program 1 times [2022-07-12 10:24:14,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:24:14,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828439219] [2022-07-12 10:24:14,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:14,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:24:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:24:14,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:24:14,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828439219] [2022-07-12 10:24:14,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828439219] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:24:14,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:24:14,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:24:14,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086903380] [2022-07-12 10:24:14,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:24:14,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:24:14,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:24:14,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:24:14,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:24:14,368 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 353 [2022-07-12 10:24:14,369 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 325 transitions, 654 flow. Second operand has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:14,370 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:24:14,370 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 353 [2022-07-12 10:24:14,370 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:24:14,509 INFO L129 PetriNetUnfolder]: 61/565 cut-off events. [2022-07-12 10:24:14,509 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-12 10:24:14,512 INFO L84 FinitePrefix]: Finished finitePrefix Result has 678 conditions, 565 events. 61/565 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2319 event pairs, 10 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 675. Up to 42 conditions per place. [2022-07-12 10:24:14,514 INFO L132 encePairwiseOnDemand]: 341/353 looper letters, 27 selfloop transitions, 11 changer transitions 0/340 dead transitions. [2022-07-12 10:24:14,514 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 340 transitions, 764 flow [2022-07-12 10:24:14,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 10:24:14,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-12 10:24:14,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1299 transitions. [2022-07-12 10:24:14,517 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.919971671388102 [2022-07-12 10:24:14,518 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1299 transitions. [2022-07-12 10:24:14,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1299 transitions. [2022-07-12 10:24:14,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:24:14,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1299 transitions. [2022-07-12 10:24:14,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 324.75) internal successors, (1299), 4 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:14,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 353.0) internal successors, (1765), 5 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:14,525 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 353.0) internal successors, (1765), 5 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:14,525 INFO L186 Difference]: Start difference. First operand has 311 places, 325 transitions, 654 flow. Second operand 4 states and 1299 transitions. [2022-07-12 10:24:14,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 340 transitions, 764 flow [2022-07-12 10:24:14,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 340 transitions, 764 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:24:14,532 INFO L242 Difference]: Finished difference. Result has 314 places, 331 transitions, 724 flow [2022-07-12 10:24:14,533 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=724, PETRI_PLACES=314, PETRI_TRANSITIONS=331} [2022-07-12 10:24:14,534 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 0 predicate places. [2022-07-12 10:24:14,534 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 331 transitions, 724 flow [2022-07-12 10:24:14,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:14,535 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:24:14,535 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:24:14,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:24:14,536 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:24:14,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:24:14,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1892940965, now seen corresponding path program 1 times [2022-07-12 10:24:14,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:24:14,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420689958] [2022-07-12 10:24:14,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:14,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:24:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:14,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:24:14,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:24:14,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420689958] [2022-07-12 10:24:14,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420689958] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:24:14,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:24:14,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:24:14,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770737266] [2022-07-12 10:24:14,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:24:14,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:24:14,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:24:14,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:24:14,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:24:14,636 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 353 [2022-07-12 10:24:14,637 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 331 transitions, 724 flow. Second operand has 3 states, 3 states have (on average 308.0) internal successors, (924), 3 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:14,637 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:24:14,637 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 353 [2022-07-12 10:24:14,637 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:24:15,144 INFO L129 PetriNetUnfolder]: 848/4653 cut-off events. [2022-07-12 10:24:15,144 INFO L130 PetriNetUnfolder]: For 362/374 co-relation queries the response was YES. [2022-07-12 10:24:15,156 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6143 conditions, 4653 events. 848/4653 cut-off events. For 362/374 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 46818 event pairs, 363 based on Foata normal form. 0/4073 useless extension candidates. Maximal degree in co-relation 6137. Up to 732 conditions per place. [2022-07-12 10:24:15,167 INFO L132 encePairwiseOnDemand]: 345/353 looper letters, 57 selfloop transitions, 4 changer transitions 0/357 dead transitions. [2022-07-12 10:24:15,168 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 357 transitions, 911 flow [2022-07-12 10:24:15,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:24:15,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:24:15,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 975 transitions. [2022-07-12 10:24:15,170 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9206798866855525 [2022-07-12 10:24:15,170 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 975 transitions. [2022-07-12 10:24:15,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 975 transitions. [2022-07-12 10:24:15,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:24:15,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 975 transitions. [2022-07-12 10:24:15,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:15,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:15,175 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:15,175 INFO L186 Difference]: Start difference. First operand has 314 places, 331 transitions, 724 flow. Second operand 3 states and 975 transitions. [2022-07-12 10:24:15,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 357 transitions, 911 flow [2022-07-12 10:24:15,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 357 transitions, 911 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:24:15,182 INFO L242 Difference]: Finished difference. Result has 318 places, 335 transitions, 764 flow [2022-07-12 10:24:15,182 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=764, PETRI_PLACES=318, PETRI_TRANSITIONS=335} [2022-07-12 10:24:15,183 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 4 predicate places. [2022-07-12 10:24:15,183 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 335 transitions, 764 flow [2022-07-12 10:24:15,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 308.0) internal successors, (924), 3 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:15,184 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:24:15,184 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:24:15,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:24:15,184 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:24:15,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:24:15,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1952454215, now seen corresponding path program 1 times [2022-07-12 10:24:15,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:24:15,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099401989] [2022-07-12 10:24:15,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:15,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:24:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:24:15,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:24:15,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099401989] [2022-07-12 10:24:15,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099401989] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:24:15,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:24:15,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:24:15,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168857667] [2022-07-12 10:24:15,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:24:15,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:24:15,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:24:15,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:24:15,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:24:15,222 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 353 [2022-07-12 10:24:15,223 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 335 transitions, 764 flow. Second operand has 3 states, 3 states have (on average 308.0) internal successors, (924), 3 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:15,223 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:24:15,223 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 353 [2022-07-12 10:24:15,224 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:24:15,635 INFO L129 PetriNetUnfolder]: 648/4102 cut-off events. [2022-07-12 10:24:15,635 INFO L130 PetriNetUnfolder]: For 527/541 co-relation queries the response was YES. [2022-07-12 10:24:15,645 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5289 conditions, 4102 events. 648/4102 cut-off events. For 527/541 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 40003 event pairs, 357 based on Foata normal form. 53/3664 useless extension candidates. Maximal degree in co-relation 5281. Up to 479 conditions per place. [2022-07-12 10:24:15,655 INFO L132 encePairwiseOnDemand]: 347/353 looper letters, 59 selfloop transitions, 2 changer transitions 0/357 dead transitions. [2022-07-12 10:24:15,655 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 357 transitions, 939 flow [2022-07-12 10:24:15,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:24:15,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:24:15,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 973 transitions. [2022-07-12 10:24:15,657 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9187913125590179 [2022-07-12 10:24:15,658 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 973 transitions. [2022-07-12 10:24:15,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 973 transitions. [2022-07-12 10:24:15,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:24:15,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 973 transitions. [2022-07-12 10:24:15,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 324.3333333333333) internal successors, (973), 3 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:15,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:15,665 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:15,665 INFO L186 Difference]: Start difference. First operand has 318 places, 335 transitions, 764 flow. Second operand 3 states and 973 transitions. [2022-07-12 10:24:15,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 357 transitions, 939 flow [2022-07-12 10:24:15,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 357 transitions, 937 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:24:15,672 INFO L242 Difference]: Finished difference. Result has 321 places, 335 transitions, 774 flow [2022-07-12 10:24:15,673 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=774, PETRI_PLACES=321, PETRI_TRANSITIONS=335} [2022-07-12 10:24:15,674 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 7 predicate places. [2022-07-12 10:24:15,674 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 335 transitions, 774 flow [2022-07-12 10:24:15,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 308.0) internal successors, (924), 3 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:15,676 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:24:15,676 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:24:15,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:24:15,676 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:24:15,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:24:15,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1351251233, now seen corresponding path program 1 times [2022-07-12 10:24:15,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:24:15,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367606680] [2022-07-12 10:24:15,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:15,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:24:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:15,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:24:15,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:24:15,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367606680] [2022-07-12 10:24:15,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367606680] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:24:15,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:24:15,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:24:15,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724723658] [2022-07-12 10:24:15,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:24:15,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:24:15,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:24:15,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:24:15,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:24:15,754 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 353 [2022-07-12 10:24:15,756 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 335 transitions, 774 flow. Second operand has 5 states, 5 states have (on average 318.6) internal successors, (1593), 5 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:15,756 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:24:15,756 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 353 [2022-07-12 10:24:15,756 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:24:15,935 INFO L129 PetriNetUnfolder]: 132/1424 cut-off events. [2022-07-12 10:24:15,935 INFO L130 PetriNetUnfolder]: For 49/62 co-relation queries the response was YES. [2022-07-12 10:24:15,943 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1731 conditions, 1424 events. 132/1424 cut-off events. For 49/62 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 9462 event pairs, 31 based on Foata normal form. 2/1295 useless extension candidates. Maximal degree in co-relation 1722. Up to 113 conditions per place. [2022-07-12 10:24:15,947 INFO L132 encePairwiseOnDemand]: 342/353 looper letters, 30 selfloop transitions, 9 changer transitions 0/352 dead transitions. [2022-07-12 10:24:15,947 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 352 transitions, 892 flow [2022-07-12 10:24:15,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:24:15,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:24:15,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1937 transitions. [2022-07-12 10:24:15,951 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9145420207743153 [2022-07-12 10:24:15,951 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1937 transitions. [2022-07-12 10:24:15,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1937 transitions. [2022-07-12 10:24:15,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:24:15,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1937 transitions. [2022-07-12 10:24:15,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 322.8333333333333) internal successors, (1937), 6 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:15,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 353.0) internal successors, (2471), 7 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:15,960 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 353.0) internal successors, (2471), 7 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:15,960 INFO L186 Difference]: Start difference. First operand has 321 places, 335 transitions, 774 flow. Second operand 6 states and 1937 transitions. [2022-07-12 10:24:15,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 352 transitions, 892 flow [2022-07-12 10:24:15,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 352 transitions, 890 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:24:15,986 INFO L242 Difference]: Finished difference. Result has 329 places, 341 transitions, 831 flow [2022-07-12 10:24:15,987 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=831, PETRI_PLACES=329, PETRI_TRANSITIONS=341} [2022-07-12 10:24:15,987 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 15 predicate places. [2022-07-12 10:24:15,987 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 341 transitions, 831 flow [2022-07-12 10:24:15,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 318.6) internal successors, (1593), 5 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:15,988 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:24:15,988 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:24:15,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:24:15,989 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:24:15,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:24:15,989 INFO L85 PathProgramCache]: Analyzing trace with hash -544975579, now seen corresponding path program 1 times [2022-07-12 10:24:15,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:24:15,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442100980] [2022-07-12 10:24:15,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:15,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:24:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:24:16,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:24:16,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442100980] [2022-07-12 10:24:16,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442100980] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:24:16,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:24:16,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:24:16,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345692916] [2022-07-12 10:24:16,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:24:16,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:24:16,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:24:16,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:24:16,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:24:16,057 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 353 [2022-07-12 10:24:16,059 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 341 transitions, 831 flow. Second operand has 5 states, 5 states have (on average 318.6) internal successors, (1593), 5 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:16,059 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:24:16,060 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 353 [2022-07-12 10:24:16,060 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:24:16,357 INFO L129 PetriNetUnfolder]: 211/2381 cut-off events. [2022-07-12 10:24:16,357 INFO L130 PetriNetUnfolder]: For 132/143 co-relation queries the response was YES. [2022-07-12 10:24:16,366 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2892 conditions, 2381 events. 211/2381 cut-off events. For 132/143 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 18196 event pairs, 42 based on Foata normal form. 0/2127 useless extension candidates. Maximal degree in co-relation 2879. Up to 171 conditions per place. [2022-07-12 10:24:16,373 INFO L132 encePairwiseOnDemand]: 342/353 looper letters, 29 selfloop transitions, 9 changer transitions 0/357 dead transitions. [2022-07-12 10:24:16,374 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 357 transitions, 944 flow [2022-07-12 10:24:16,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:24:16,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:24:16,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1936 transitions. [2022-07-12 10:24:16,377 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9140698772426817 [2022-07-12 10:24:16,377 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1936 transitions. [2022-07-12 10:24:16,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1936 transitions. [2022-07-12 10:24:16,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:24:16,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1936 transitions. [2022-07-12 10:24:16,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 322.6666666666667) internal successors, (1936), 6 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:16,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 353.0) internal successors, (2471), 7 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:16,384 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 353.0) internal successors, (2471), 7 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:16,384 INFO L186 Difference]: Start difference. First operand has 329 places, 341 transitions, 831 flow. Second operand 6 states and 1936 transitions. [2022-07-12 10:24:16,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 357 transitions, 944 flow [2022-07-12 10:24:16,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 357 transitions, 939 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:24:16,390 INFO L242 Difference]: Finished difference. Result has 337 places, 347 transitions, 885 flow [2022-07-12 10:24:16,391 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=885, PETRI_PLACES=337, PETRI_TRANSITIONS=347} [2022-07-12 10:24:16,393 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 23 predicate places. [2022-07-12 10:24:16,393 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 347 transitions, 885 flow [2022-07-12 10:24:16,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 318.6) internal successors, (1593), 5 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:16,394 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:24:16,394 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:24:16,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:24:16,395 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:24:16,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:24:16,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1786217094, now seen corresponding path program 1 times [2022-07-12 10:24:16,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:24:16,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100858086] [2022-07-12 10:24:16,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:16,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:24:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:24:16,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:24:16,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100858086] [2022-07-12 10:24:16,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100858086] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:24:16,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:24:16,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:24:16,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060288502] [2022-07-12 10:24:16,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:24:16,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:24:16,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:24:16,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:24:16,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:24:16,461 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 353 [2022-07-12 10:24:16,462 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 347 transitions, 885 flow. Second operand has 5 states, 5 states have (on average 324.4) internal successors, (1622), 5 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:16,463 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:24:16,463 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 353 [2022-07-12 10:24:16,463 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:24:16,649 INFO L129 PetriNetUnfolder]: 110/1717 cut-off events. [2022-07-12 10:24:16,649 INFO L130 PetriNetUnfolder]: For 75/87 co-relation queries the response was YES. [2022-07-12 10:24:16,659 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2075 conditions, 1717 events. 110/1717 cut-off events. For 75/87 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 11598 event pairs, 4 based on Foata normal form. 0/1581 useless extension candidates. Maximal degree in co-relation 2058. Up to 53 conditions per place. [2022-07-12 10:24:16,662 INFO L132 encePairwiseOnDemand]: 348/353 looper letters, 16 selfloop transitions, 4 changer transitions 0/351 dead transitions. [2022-07-12 10:24:16,662 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 351 transitions, 933 flow [2022-07-12 10:24:16,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:24:16,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-12 10:24:16,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1631 transitions. [2022-07-12 10:24:16,665 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9240793201133144 [2022-07-12 10:24:16,665 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1631 transitions. [2022-07-12 10:24:16,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1631 transitions. [2022-07-12 10:24:16,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:24:16,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1631 transitions. [2022-07-12 10:24:16,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 326.2) internal successors, (1631), 5 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:16,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 353.0) internal successors, (2118), 6 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:16,670 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 353.0) internal successors, (2118), 6 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:16,670 INFO L186 Difference]: Start difference. First operand has 337 places, 347 transitions, 885 flow. Second operand 5 states and 1631 transitions. [2022-07-12 10:24:16,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 351 transitions, 933 flow [2022-07-12 10:24:16,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 351 transitions, 928 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:24:16,675 INFO L242 Difference]: Finished difference. Result has 341 places, 348 transitions, 896 flow [2022-07-12 10:24:16,676 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=896, PETRI_PLACES=341, PETRI_TRANSITIONS=348} [2022-07-12 10:24:16,676 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 27 predicate places. [2022-07-12 10:24:16,676 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 348 transitions, 896 flow [2022-07-12 10:24:16,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 324.4) internal successors, (1622), 5 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:16,677 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:24:16,677 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:24:16,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:24:16,677 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:24:16,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:24:16,678 INFO L85 PathProgramCache]: Analyzing trace with hash 20910411, now seen corresponding path program 1 times [2022-07-12 10:24:16,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:24:16,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297937363] [2022-07-12 10:24:16,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:16,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:24:16,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:24:16,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:24:16,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297937363] [2022-07-12 10:24:16,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297937363] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:24:16,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417907688] [2022-07-12 10:24:16,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:16,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:24:16,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:24:16,744 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:24:16,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:24:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:16,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 10:24:16,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:24:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:24:16,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:24:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:24:17,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417907688] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:24:17,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:24:17,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-07-12 10:24:17,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005028137] [2022-07-12 10:24:17,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:24:17,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:24:17,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:24:17,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:24:17,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:24:17,051 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 353 [2022-07-12 10:24:17,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 348 transitions, 896 flow. Second operand has 14 states, 14 states have (on average 323.64285714285717) internal successors, (4531), 14 states have internal predecessors, (4531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:17,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:24:17,055 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 353 [2022-07-12 10:24:17,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:24:17,310 INFO L129 PetriNetUnfolder]: 110/1726 cut-off events. [2022-07-12 10:24:17,311 INFO L130 PetriNetUnfolder]: For 76/88 co-relation queries the response was YES. [2022-07-12 10:24:17,322 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2096 conditions, 1726 events. 110/1726 cut-off events. For 76/88 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 11564 event pairs, 4 based on Foata normal form. 2/1593 useless extension candidates. Maximal degree in co-relation 2078. Up to 53 conditions per place. [2022-07-12 10:24:17,325 INFO L132 encePairwiseOnDemand]: 345/353 looper letters, 17 selfloop transitions, 11 changer transitions 0/358 dead transitions. [2022-07-12 10:24:17,326 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 358 transitions, 974 flow [2022-07-12 10:24:17,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:24:17,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-12 10:24:17,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3561 transitions. [2022-07-12 10:24:17,331 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9170744269894412 [2022-07-12 10:24:17,331 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3561 transitions. [2022-07-12 10:24:17,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3561 transitions. [2022-07-12 10:24:17,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:24:17,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3561 transitions. [2022-07-12 10:24:17,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 323.72727272727275) internal successors, (3561), 11 states have internal predecessors, (3561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:17,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 353.0) internal successors, (4236), 12 states have internal predecessors, (4236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:17,353 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 353.0) internal successors, (4236), 12 states have internal predecessors, (4236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:17,353 INFO L186 Difference]: Start difference. First operand has 341 places, 348 transitions, 896 flow. Second operand 11 states and 3561 transitions. [2022-07-12 10:24:17,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 358 transitions, 974 flow [2022-07-12 10:24:17,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 358 transitions, 968 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-12 10:24:17,359 INFO L242 Difference]: Finished difference. Result has 351 places, 354 transitions, 945 flow [2022-07-12 10:24:17,359 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=945, PETRI_PLACES=351, PETRI_TRANSITIONS=354} [2022-07-12 10:24:17,361 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 37 predicate places. [2022-07-12 10:24:17,361 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 354 transitions, 945 flow [2022-07-12 10:24:17,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 323.64285714285717) internal successors, (4531), 14 states have internal predecessors, (4531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:17,362 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:24:17,362 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:24:17,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:24:17,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:24:17,572 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:24:17,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:24:17,572 INFO L85 PathProgramCache]: Analyzing trace with hash -523708949, now seen corresponding path program 2 times [2022-07-12 10:24:17,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:24:17,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879470034] [2022-07-12 10:24:17,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:17,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:24:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:17,638 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 10:24:17,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:24:17,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879470034] [2022-07-12 10:24:17,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879470034] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:24:17,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:24:17,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:24:17,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700149131] [2022-07-12 10:24:17,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:24:17,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:24:17,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:24:17,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:24:17,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:24:17,642 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 353 [2022-07-12 10:24:17,643 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 354 transitions, 945 flow. Second operand has 8 states, 8 states have (on average 309.125) internal successors, (2473), 8 states have internal predecessors, (2473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:17,643 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:24:17,643 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 353 [2022-07-12 10:24:17,644 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:24:17,914 INFO L129 PetriNetUnfolder]: 111/1830 cut-off events. [2022-07-12 10:24:17,914 INFO L130 PetriNetUnfolder]: For 78/90 co-relation queries the response was YES. [2022-07-12 10:24:17,926 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2404 conditions, 1830 events. 111/1830 cut-off events. For 78/90 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 12295 event pairs, 4 based on Foata normal form. 8/1703 useless extension candidates. Maximal degree in co-relation 2383. Up to 128 conditions per place. [2022-07-12 10:24:17,930 INFO L132 encePairwiseOnDemand]: 344/353 looper letters, 35 selfloop transitions, 4 changer transitions 5/369 dead transitions. [2022-07-12 10:24:17,930 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 369 transitions, 1063 flow [2022-07-12 10:24:17,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:24:17,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:24:17,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2493 transitions. [2022-07-12 10:24:17,934 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8827903682719547 [2022-07-12 10:24:17,934 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2493 transitions. [2022-07-12 10:24:17,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2493 transitions. [2022-07-12 10:24:17,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:24:17,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2493 transitions. [2022-07-12 10:24:17,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 311.625) internal successors, (2493), 8 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:17,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 353.0) internal successors, (3177), 9 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:17,942 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 353.0) internal successors, (3177), 9 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:17,942 INFO L186 Difference]: Start difference. First operand has 351 places, 354 transitions, 945 flow. Second operand 8 states and 2493 transitions. [2022-07-12 10:24:17,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 369 transitions, 1063 flow [2022-07-12 10:24:17,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 369 transitions, 1054 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-12 10:24:17,948 INFO L242 Difference]: Finished difference. Result has 361 places, 357 transitions, 972 flow [2022-07-12 10:24:17,949 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=972, PETRI_PLACES=361, PETRI_TRANSITIONS=357} [2022-07-12 10:24:17,949 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 47 predicate places. [2022-07-12 10:24:17,949 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 357 transitions, 972 flow [2022-07-12 10:24:17,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 309.125) internal successors, (2473), 8 states have internal predecessors, (2473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:17,950 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:24:17,950 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:24:17,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 10:24:17,951 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:24:17,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:24:17,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1163854113, now seen corresponding path program 1 times [2022-07-12 10:24:17,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:24:17,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339679129] [2022-07-12 10:24:17,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:17,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:24:17,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:18,013 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 10:24:18,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:24:18,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339679129] [2022-07-12 10:24:18,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339679129] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:24:18,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:24:18,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:24:18,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382593539] [2022-07-12 10:24:18,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:24:18,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:24:18,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:24:18,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:24:18,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:24:18,019 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 353 [2022-07-12 10:24:18,019 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 357 transitions, 972 flow. Second operand has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:18,020 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:24:18,020 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 353 [2022-07-12 10:24:18,020 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:24:18,393 INFO L129 PetriNetUnfolder]: 293/2938 cut-off events. [2022-07-12 10:24:18,394 INFO L130 PetriNetUnfolder]: For 213/224 co-relation queries the response was YES. [2022-07-12 10:24:18,413 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3963 conditions, 2938 events. 293/2938 cut-off events. For 213/224 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 24033 event pairs, 64 based on Foata normal form. 0/2626 useless extension candidates. Maximal degree in co-relation 3936. Up to 196 conditions per place. [2022-07-12 10:24:18,420 INFO L132 encePairwiseOnDemand]: 341/353 looper letters, 26 selfloop transitions, 11 changer transitions 0/371 dead transitions. [2022-07-12 10:24:18,420 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 371 transitions, 1077 flow [2022-07-12 10:24:18,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 10:24:18,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-12 10:24:18,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1298 transitions. [2022-07-12 10:24:18,422 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9192634560906515 [2022-07-12 10:24:18,423 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1298 transitions. [2022-07-12 10:24:18,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1298 transitions. [2022-07-12 10:24:18,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:24:18,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1298 transitions. [2022-07-12 10:24:18,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 324.5) internal successors, (1298), 4 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:18,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 353.0) internal successors, (1765), 5 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:18,427 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 353.0) internal successors, (1765), 5 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:18,427 INFO L186 Difference]: Start difference. First operand has 361 places, 357 transitions, 972 flow. Second operand 4 states and 1298 transitions. [2022-07-12 10:24:18,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 371 transitions, 1077 flow [2022-07-12 10:24:18,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 371 transitions, 1067 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-07-12 10:24:18,435 INFO L242 Difference]: Finished difference. Result has 358 places, 363 transitions, 1032 flow [2022-07-12 10:24:18,436 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1032, PETRI_PLACES=358, PETRI_TRANSITIONS=363} [2022-07-12 10:24:18,436 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 44 predicate places. [2022-07-12 10:24:18,436 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 363 transitions, 1032 flow [2022-07-12 10:24:18,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:18,437 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:24:18,437 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:24:18,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 10:24:18,438 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:24:18,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:24:18,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1467056166, now seen corresponding path program 1 times [2022-07-12 10:24:18,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:24:18,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566652920] [2022-07-12 10:24:18,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:18,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:24:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:18,469 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 10:24:18,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:24:18,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566652920] [2022-07-12 10:24:18,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566652920] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:24:18,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:24:18,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:24:18,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824524367] [2022-07-12 10:24:18,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:24:18,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:24:18,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:24:18,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:24:18,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:24:18,472 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 353 [2022-07-12 10:24:18,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 363 transitions, 1032 flow. Second operand has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:18,473 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:24:18,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 353 [2022-07-12 10:24:18,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:24:18,715 INFO L129 PetriNetUnfolder]: 176/2079 cut-off events. [2022-07-12 10:24:18,715 INFO L130 PetriNetUnfolder]: For 171/302 co-relation queries the response was YES. [2022-07-12 10:24:18,729 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2873 conditions, 2079 events. 176/2079 cut-off events. For 171/302 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 14269 event pairs, 36 based on Foata normal form. 10/1958 useless extension candidates. Maximal degree in co-relation 2848. Up to 135 conditions per place. [2022-07-12 10:24:18,734 INFO L132 encePairwiseOnDemand]: 348/353 looper letters, 35 selfloop transitions, 4 changer transitions 0/372 dead transitions. [2022-07-12 10:24:18,734 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 372 transitions, 1135 flow [2022-07-12 10:24:18,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:24:18,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-12 10:24:18,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1611 transitions. [2022-07-12 10:24:18,737 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9127478753541076 [2022-07-12 10:24:18,737 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1611 transitions. [2022-07-12 10:24:18,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1611 transitions. [2022-07-12 10:24:18,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:24:18,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1611 transitions. [2022-07-12 10:24:18,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 322.2) internal successors, (1611), 5 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:18,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 353.0) internal successors, (2118), 6 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:18,742 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 353.0) internal successors, (2118), 6 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:18,742 INFO L186 Difference]: Start difference. First operand has 358 places, 363 transitions, 1032 flow. Second operand 5 states and 1611 transitions. [2022-07-12 10:24:18,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 372 transitions, 1135 flow [2022-07-12 10:24:18,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 372 transitions, 1133 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-12 10:24:18,749 INFO L242 Difference]: Finished difference. Result has 363 places, 363 transitions, 1044 flow [2022-07-12 10:24:18,750 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1044, PETRI_PLACES=363, PETRI_TRANSITIONS=363} [2022-07-12 10:24:18,751 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 49 predicate places. [2022-07-12 10:24:18,751 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 363 transitions, 1044 flow [2022-07-12 10:24:18,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:18,751 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:24:18,752 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:24:18,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 10:24:18,752 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:24:18,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:24:18,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1559069933, now seen corresponding path program 1 times [2022-07-12 10:24:18,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:24:18,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662578481] [2022-07-12 10:24:18,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:18,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:24:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 10:24:18,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:24:18,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662578481] [2022-07-12 10:24:18,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662578481] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:24:18,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:24:18,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:24:18,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811443913] [2022-07-12 10:24:18,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:24:18,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:24:18,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:24:18,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:24:18,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:24:18,795 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 353 [2022-07-12 10:24:18,797 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 363 transitions, 1044 flow. Second operand has 6 states, 6 states have (on average 299.3333333333333) internal successors, (1796), 6 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:18,797 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:24:18,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 353 [2022-07-12 10:24:18,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:24:19,954 INFO L129 PetriNetUnfolder]: 1757/9306 cut-off events. [2022-07-12 10:24:19,955 INFO L130 PetriNetUnfolder]: For 3062/3087 co-relation queries the response was YES. [2022-07-12 10:24:19,983 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15312 conditions, 9306 events. 1757/9306 cut-off events. For 3062/3087 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 95603 event pairs, 685 based on Foata normal form. 31/8489 useless extension candidates. Maximal degree in co-relation 15285. Up to 1894 conditions per place. [2022-07-12 10:24:20,003 INFO L132 encePairwiseOnDemand]: 343/353 looper letters, 184 selfloop transitions, 36 changer transitions 0/527 dead transitions. [2022-07-12 10:24:20,003 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 527 transitions, 2115 flow [2022-07-12 10:24:20,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 10:24:20,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-12 10:24:20,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 5234 transitions. [2022-07-12 10:24:20,011 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.872187968671888 [2022-07-12 10:24:20,011 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 5234 transitions. [2022-07-12 10:24:20,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 5234 transitions. [2022-07-12 10:24:20,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:24:20,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 5234 transitions. [2022-07-12 10:24:20,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 307.88235294117646) internal successors, (5234), 17 states have internal predecessors, (5234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:20,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 353.0) internal successors, (6354), 18 states have internal predecessors, (6354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:20,026 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 353.0) internal successors, (6354), 18 states have internal predecessors, (6354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:20,026 INFO L186 Difference]: Start difference. First operand has 363 places, 363 transitions, 1044 flow. Second operand 17 states and 5234 transitions. [2022-07-12 10:24:20,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 527 transitions, 2115 flow [2022-07-12 10:24:20,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 527 transitions, 2093 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-07-12 10:24:20,043 INFO L242 Difference]: Finished difference. Result has 385 places, 391 transitions, 1302 flow [2022-07-12 10:24:20,044 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1302, PETRI_PLACES=385, PETRI_TRANSITIONS=391} [2022-07-12 10:24:20,044 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 71 predicate places. [2022-07-12 10:24:20,044 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 391 transitions, 1302 flow [2022-07-12 10:24:20,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 299.3333333333333) internal successors, (1796), 6 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:20,045 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:24:20,045 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:24:20,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 10:24:20,045 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:24:20,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:24:20,046 INFO L85 PathProgramCache]: Analyzing trace with hash 446122812, now seen corresponding path program 1 times [2022-07-12 10:24:20,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:24:20,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758718232] [2022-07-12 10:24:20,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:20,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:24:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 10:24:20,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:24:20,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758718232] [2022-07-12 10:24:20,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758718232] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:24:20,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:24:20,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:24:20,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342268402] [2022-07-12 10:24:20,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:24:20,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:24:20,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:24:20,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:24:20,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:24:20,079 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 353 [2022-07-12 10:24:20,079 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 391 transitions, 1302 flow. Second operand has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:20,079 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:24:20,080 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 353 [2022-07-12 10:24:20,080 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:24:21,259 INFO L129 PetriNetUnfolder]: 1134/9270 cut-off events. [2022-07-12 10:24:21,259 INFO L130 PetriNetUnfolder]: For 2880/2898 co-relation queries the response was YES. [2022-07-12 10:24:21,314 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13766 conditions, 9270 events. 1134/9270 cut-off events. For 2880/2898 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 99047 event pairs, 278 based on Foata normal form. 2/8509 useless extension candidates. Maximal degree in co-relation 13733. Up to 739 conditions per place. [2022-07-12 10:24:21,336 INFO L132 encePairwiseOnDemand]: 349/353 looper letters, 55 selfloop transitions, 3 changer transitions 0/412 dead transitions. [2022-07-12 10:24:21,336 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 412 transitions, 1493 flow [2022-07-12 10:24:21,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:24:21,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:24:21,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 972 transitions. [2022-07-12 10:24:21,338 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9178470254957507 [2022-07-12 10:24:21,339 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 972 transitions. [2022-07-12 10:24:21,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 972 transitions. [2022-07-12 10:24:21,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:24:21,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 972 transitions. [2022-07-12 10:24:21,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:21,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:21,342 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:21,342 INFO L186 Difference]: Start difference. First operand has 385 places, 391 transitions, 1302 flow. Second operand 3 states and 972 transitions. [2022-07-12 10:24:21,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 412 transitions, 1493 flow [2022-07-12 10:24:21,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 412 transitions, 1459 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-07-12 10:24:21,362 INFO L242 Difference]: Finished difference. Result has 385 places, 393 transitions, 1290 flow [2022-07-12 10:24:21,363 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1290, PETRI_PLACES=385, PETRI_TRANSITIONS=393} [2022-07-12 10:24:21,363 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 71 predicate places. [2022-07-12 10:24:21,364 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 393 transitions, 1290 flow [2022-07-12 10:24:21,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:21,364 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:24:21,364 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:24:21,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 10:24:21,365 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:24:21,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:24:21,365 INFO L85 PathProgramCache]: Analyzing trace with hash 2055578978, now seen corresponding path program 1 times [2022-07-12 10:24:21,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:24:21,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506349752] [2022-07-12 10:24:21,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:21,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:24:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:21,403 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 10:24:21,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:24:21,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506349752] [2022-07-12 10:24:21,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506349752] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:24:21,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:24:21,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:24:21,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198124357] [2022-07-12 10:24:21,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:24:21,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:24:21,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:24:21,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:24:21,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:24:21,406 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 353 [2022-07-12 10:24:21,407 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 393 transitions, 1290 flow. Second operand has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:21,408 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:24:21,408 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 353 [2022-07-12 10:24:21,408 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:24:21,815 INFO L129 PetriNetUnfolder]: 296/3307 cut-off events. [2022-07-12 10:24:21,816 INFO L130 PetriNetUnfolder]: For 740/946 co-relation queries the response was YES. [2022-07-12 10:24:21,838 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4918 conditions, 3307 events. 296/3307 cut-off events. For 740/946 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 26267 event pairs, 53 based on Foata normal form. 30/3163 useless extension candidates. Maximal degree in co-relation 4884. Up to 215 conditions per place. [2022-07-12 10:24:21,845 INFO L132 encePairwiseOnDemand]: 343/353 looper letters, 44 selfloop transitions, 19 changer transitions 0/412 dead transitions. [2022-07-12 10:24:21,845 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 412 transitions, 1473 flow [2022-07-12 10:24:21,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:24:21,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:24:21,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2239 transitions. [2022-07-12 10:24:21,848 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9061108862808579 [2022-07-12 10:24:21,848 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2239 transitions. [2022-07-12 10:24:21,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2239 transitions. [2022-07-12 10:24:21,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:24:21,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2239 transitions. [2022-07-12 10:24:21,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 319.85714285714283) internal successors, (2239), 7 states have internal predecessors, (2239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:21,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 353.0) internal successors, (2824), 8 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:21,855 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 353.0) internal successors, (2824), 8 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:21,855 INFO L186 Difference]: Start difference. First operand has 385 places, 393 transitions, 1290 flow. Second operand 7 states and 2239 transitions. [2022-07-12 10:24:21,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 412 transitions, 1473 flow [2022-07-12 10:24:21,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 412 transitions, 1467 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-12 10:24:21,865 INFO L242 Difference]: Finished difference. Result has 392 places, 399 transitions, 1374 flow [2022-07-12 10:24:21,865 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1284, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1374, PETRI_PLACES=392, PETRI_TRANSITIONS=399} [2022-07-12 10:24:21,866 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 78 predicate places. [2022-07-12 10:24:21,866 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 399 transitions, 1374 flow [2022-07-12 10:24:21,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:21,866 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:24:21,866 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:24:21,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 10:24:21,867 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:24:21,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:24:21,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1907405474, now seen corresponding path program 1 times [2022-07-12 10:24:21,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:24:21,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990571185] [2022-07-12 10:24:21,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:21,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:24:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 10:24:21,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:24:21,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990571185] [2022-07-12 10:24:21,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990571185] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:24:21,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:24:21,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:24:21,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569512464] [2022-07-12 10:24:21,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:24:21,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:24:21,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:24:21,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:24:21,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:24:21,899 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 353 [2022-07-12 10:24:21,900 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 399 transitions, 1374 flow. Second operand has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:21,900 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:24:21,900 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 353 [2022-07-12 10:24:21,900 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:24:23,104 INFO L129 PetriNetUnfolder]: 1050/9717 cut-off events. [2022-07-12 10:24:23,105 INFO L130 PetriNetUnfolder]: For 3278/3323 co-relation queries the response was YES. [2022-07-12 10:24:23,148 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14556 conditions, 9717 events. 1050/9717 cut-off events. For 3278/3323 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 105447 event pairs, 313 based on Foata normal form. 9/9002 useless extension candidates. Maximal degree in co-relation 14519. Up to 819 conditions per place. [2022-07-12 10:24:23,165 INFO L132 encePairwiseOnDemand]: 350/353 looper letters, 53 selfloop transitions, 2 changer transitions 0/415 dead transitions. [2022-07-12 10:24:23,165 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 415 transitions, 1539 flow [2022-07-12 10:24:23,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:24:23,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:24:23,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 969 transitions. [2022-07-12 10:24:23,167 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9150141643059491 [2022-07-12 10:24:23,167 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 969 transitions. [2022-07-12 10:24:23,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 969 transitions. [2022-07-12 10:24:23,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:24:23,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 969 transitions. [2022-07-12 10:24:23,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:23,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:23,170 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:23,170 INFO L186 Difference]: Start difference. First operand has 392 places, 399 transitions, 1374 flow. Second operand 3 states and 969 transitions. [2022-07-12 10:24:23,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 415 transitions, 1539 flow [2022-07-12 10:24:23,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 415 transitions, 1521 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-07-12 10:24:23,191 INFO L242 Difference]: Finished difference. Result has 393 places, 399 transitions, 1364 flow [2022-07-12 10:24:23,192 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1352, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1364, PETRI_PLACES=393, PETRI_TRANSITIONS=399} [2022-07-12 10:24:23,192 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 79 predicate places. [2022-07-12 10:24:23,193 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 399 transitions, 1364 flow [2022-07-12 10:24:23,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:23,193 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:24:23,193 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:24:23,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 10:24:23,194 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:24:23,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:24:23,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1289922524, now seen corresponding path program 1 times [2022-07-12 10:24:23,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:24:23,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854963865] [2022-07-12 10:24:23,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:23,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:24:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 10:24:23,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:24:23,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854963865] [2022-07-12 10:24:23,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854963865] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:24:23,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:24:23,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:24:23,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740873536] [2022-07-12 10:24:23,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:24:23,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:24:23,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:24:23,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:24:23,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:24:23,243 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 353 [2022-07-12 10:24:23,244 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 399 transitions, 1364 flow. Second operand has 6 states, 6 states have (on average 316.8333333333333) internal successors, (1901), 6 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:23,244 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:24:23,244 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 353 [2022-07-12 10:24:23,244 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:24:23,784 INFO L129 PetriNetUnfolder]: 338/3933 cut-off events. [2022-07-12 10:24:23,784 INFO L130 PetriNetUnfolder]: For 813/1024 co-relation queries the response was YES. [2022-07-12 10:24:23,818 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5999 conditions, 3933 events. 338/3933 cut-off events. For 813/1024 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 32917 event pairs, 58 based on Foata normal form. 42/3769 useless extension candidates. Maximal degree in co-relation 5960. Up to 303 conditions per place. [2022-07-12 10:24:23,826 INFO L132 encePairwiseOnDemand]: 341/353 looper letters, 41 selfloop transitions, 12 changer transitions 0/424 dead transitions. [2022-07-12 10:24:23,826 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 424 transitions, 1539 flow [2022-07-12 10:24:23,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:24:23,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:24:23,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2248 transitions. [2022-07-12 10:24:23,830 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9097531363820316 [2022-07-12 10:24:23,830 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2248 transitions. [2022-07-12 10:24:23,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2248 transitions. [2022-07-12 10:24:23,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:24:23,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2248 transitions. [2022-07-12 10:24:23,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 321.14285714285717) internal successors, (2248), 7 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:23,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 353.0) internal successors, (2824), 8 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:23,836 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 353.0) internal successors, (2824), 8 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:23,836 INFO L186 Difference]: Start difference. First operand has 393 places, 399 transitions, 1364 flow. Second operand 7 states and 2248 transitions. [2022-07-12 10:24:23,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 424 transitions, 1539 flow [2022-07-12 10:24:23,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 424 transitions, 1537 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:24:23,848 INFO L242 Difference]: Finished difference. Result has 403 places, 410 transitions, 1461 flow [2022-07-12 10:24:23,848 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1362, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1461, PETRI_PLACES=403, PETRI_TRANSITIONS=410} [2022-07-12 10:24:23,849 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 89 predicate places. [2022-07-12 10:24:23,849 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 410 transitions, 1461 flow [2022-07-12 10:24:23,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 316.8333333333333) internal successors, (1901), 6 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:23,849 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:24:23,850 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:24:23,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-12 10:24:23,850 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:24:23,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:24:23,850 INFO L85 PathProgramCache]: Analyzing trace with hash 743740860, now seen corresponding path program 1 times [2022-07-12 10:24:23,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:24:23,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548931827] [2022-07-12 10:24:23,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:23,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:24:23,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-12 10:24:23,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:24:23,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548931827] [2022-07-12 10:24:23,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548931827] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:24:23,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:24:23,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:24:23,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241349757] [2022-07-12 10:24:23,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:24:23,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:24:23,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:24:23,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:24:23,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:24:23,904 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 353 [2022-07-12 10:24:23,905 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 410 transitions, 1461 flow. Second operand has 7 states, 7 states have (on average 314.7142857142857) internal successors, (2203), 7 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:23,906 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:24:23,906 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 353 [2022-07-12 10:24:23,906 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:24:24,566 INFO L129 PetriNetUnfolder]: 401/5034 cut-off events. [2022-07-12 10:24:24,566 INFO L130 PetriNetUnfolder]: For 1430/1843 co-relation queries the response was YES. [2022-07-12 10:24:24,610 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8147 conditions, 5034 events. 401/5034 cut-off events. For 1430/1843 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 45526 event pairs, 57 based on Foata normal form. 21/4778 useless extension candidates. Maximal degree in co-relation 8103. Up to 530 conditions per place. [2022-07-12 10:24:24,620 INFO L132 encePairwiseOnDemand]: 337/353 looper letters, 50 selfloop transitions, 17 changer transitions 0/435 dead transitions. [2022-07-12 10:24:24,620 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 435 transitions, 1692 flow [2022-07-12 10:24:24,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:24:24,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:24:24,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2551 transitions. [2022-07-12 10:24:24,623 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9033286118980169 [2022-07-12 10:24:24,623 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2551 transitions. [2022-07-12 10:24:24,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2551 transitions. [2022-07-12 10:24:24,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:24:24,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2551 transitions. [2022-07-12 10:24:24,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 318.875) internal successors, (2551), 8 states have internal predecessors, (2551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:24,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 353.0) internal successors, (3177), 9 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:24,630 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 353.0) internal successors, (3177), 9 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:24,631 INFO L186 Difference]: Start difference. First operand has 403 places, 410 transitions, 1461 flow. Second operand 8 states and 2551 transitions. [2022-07-12 10:24:24,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 435 transitions, 1692 flow [2022-07-12 10:24:24,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 435 transitions, 1690 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-12 10:24:24,646 INFO L242 Difference]: Finished difference. Result has 414 places, 419 transitions, 1582 flow [2022-07-12 10:24:24,646 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1459, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1582, PETRI_PLACES=414, PETRI_TRANSITIONS=419} [2022-07-12 10:24:24,646 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 100 predicate places. [2022-07-12 10:24:24,647 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 419 transitions, 1582 flow [2022-07-12 10:24:24,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 314.7142857142857) internal successors, (2203), 7 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:24,647 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:24:24,647 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:24:24,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-12 10:24:24,648 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:24:24,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:24:24,648 INFO L85 PathProgramCache]: Analyzing trace with hash -2031545637, now seen corresponding path program 1 times [2022-07-12 10:24:24,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:24:24,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926224947] [2022-07-12 10:24:24,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:24,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:24:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 10:24:24,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:24:24,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926224947] [2022-07-12 10:24:24,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926224947] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:24:24,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:24:24,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:24:24,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106940423] [2022-07-12 10:24:24,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:24:24,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:24:24,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:24:24,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:24:24,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:24:24,691 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 353 [2022-07-12 10:24:24,692 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 419 transitions, 1582 flow. Second operand has 5 states, 5 states have (on average 316.8) internal successors, (1584), 5 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:24,692 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:24:24,692 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 353 [2022-07-12 10:24:24,693 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:24:25,704 INFO L129 PetriNetUnfolder]: 742/6727 cut-off events. [2022-07-12 10:24:25,705 INFO L130 PetriNetUnfolder]: For 2958/2985 co-relation queries the response was YES. [2022-07-12 10:24:25,759 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10927 conditions, 6727 events. 742/6727 cut-off events. For 2958/2985 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 69585 event pairs, 252 based on Foata normal form. 39/6121 useless extension candidates. Maximal degree in co-relation 10878. Up to 724 conditions per place. [2022-07-12 10:24:25,771 INFO L132 encePairwiseOnDemand]: 343/353 looper letters, 46 selfloop transitions, 19 changer transitions 0/436 dead transitions. [2022-07-12 10:24:25,772 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 436 transitions, 1768 flow [2022-07-12 10:24:25,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:24:25,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:24:25,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2238 transitions. [2022-07-12 10:24:25,774 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.905706191825172 [2022-07-12 10:24:25,774 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2238 transitions. [2022-07-12 10:24:25,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2238 transitions. [2022-07-12 10:24:25,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:24:25,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2238 transitions. [2022-07-12 10:24:25,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 319.7142857142857) internal successors, (2238), 7 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:25,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 353.0) internal successors, (2824), 8 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:25,780 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 353.0) internal successors, (2824), 8 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:25,780 INFO L186 Difference]: Start difference. First operand has 414 places, 419 transitions, 1582 flow. Second operand 7 states and 2238 transitions. [2022-07-12 10:24:25,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 436 transitions, 1768 flow [2022-07-12 10:24:25,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 436 transitions, 1749 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-07-12 10:24:25,800 INFO L242 Difference]: Finished difference. Result has 420 places, 425 transitions, 1659 flow [2022-07-12 10:24:25,801 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1563, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1659, PETRI_PLACES=420, PETRI_TRANSITIONS=425} [2022-07-12 10:24:25,801 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 106 predicate places. [2022-07-12 10:24:25,801 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 425 transitions, 1659 flow [2022-07-12 10:24:25,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 316.8) internal successors, (1584), 5 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:25,802 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:24:25,802 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:24:25,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-12 10:24:25,802 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:24:25,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:24:25,803 INFO L85 PathProgramCache]: Analyzing trace with hash -353053735, now seen corresponding path program 1 times [2022-07-12 10:24:25,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:24:25,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019672558] [2022-07-12 10:24:25,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:25,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:24:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:25,855 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-12 10:24:25,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:24:25,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019672558] [2022-07-12 10:24:25,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019672558] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:24:25,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:24:25,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:24:25,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751950415] [2022-07-12 10:24:25,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:24:25,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:24:25,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:24:25,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:24:25,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:24:25,858 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 353 [2022-07-12 10:24:25,860 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 425 transitions, 1659 flow. Second operand has 7 states, 7 states have (on average 314.7142857142857) internal successors, (2203), 7 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:25,860 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:24:25,860 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 353 [2022-07-12 10:24:25,860 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:24:27,336 INFO L129 PetriNetUnfolder]: 918/8177 cut-off events. [2022-07-12 10:24:27,337 INFO L130 PetriNetUnfolder]: For 3841/3874 co-relation queries the response was YES. [2022-07-12 10:24:27,430 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13872 conditions, 8177 events. 918/8177 cut-off events. For 3841/3874 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 91020 event pairs, 303 based on Foata normal form. 22/7405 useless extension candidates. Maximal degree in co-relation 13820. Up to 994 conditions per place. [2022-07-12 10:24:27,450 INFO L132 encePairwiseOnDemand]: 337/353 looper letters, 39 selfloop transitions, 17 changer transitions 0/450 dead transitions. [2022-07-12 10:24:27,450 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 450 transitions, 1838 flow [2022-07-12 10:24:27,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:24:27,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:24:27,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2550 transitions. [2022-07-12 10:24:27,453 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9029745042492918 [2022-07-12 10:24:27,453 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2550 transitions. [2022-07-12 10:24:27,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2550 transitions. [2022-07-12 10:24:27,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:24:27,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2550 transitions. [2022-07-12 10:24:27,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 318.75) internal successors, (2550), 8 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:27,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 353.0) internal successors, (3177), 9 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:27,460 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 353.0) internal successors, (3177), 9 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:27,460 INFO L186 Difference]: Start difference. First operand has 420 places, 425 transitions, 1659 flow. Second operand 8 states and 2550 transitions. [2022-07-12 10:24:27,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 450 transitions, 1838 flow [2022-07-12 10:24:27,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 450 transitions, 1814 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-07-12 10:24:27,492 INFO L242 Difference]: Finished difference. Result has 429 places, 435 transitions, 1744 flow [2022-07-12 10:24:27,492 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1635, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1744, PETRI_PLACES=429, PETRI_TRANSITIONS=435} [2022-07-12 10:24:27,493 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 115 predicate places. [2022-07-12 10:24:27,493 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 435 transitions, 1744 flow [2022-07-12 10:24:27,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 314.7142857142857) internal successors, (2203), 7 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:27,494 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:24:27,494 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:24:27,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-12 10:24:27,494 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:24:27,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:24:27,494 INFO L85 PathProgramCache]: Analyzing trace with hash -845106151, now seen corresponding path program 1 times [2022-07-12 10:24:27,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:24:27,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607538468] [2022-07-12 10:24:27,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:27,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:24:27,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 10:24:27,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:24:27,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607538468] [2022-07-12 10:24:27,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607538468] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:24:27,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:24:27,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:24:27,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492580467] [2022-07-12 10:24:27,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:24:27,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:24:27,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:24:27,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:24:27,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:24:27,525 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 353 [2022-07-12 10:24:27,526 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 435 transitions, 1744 flow. Second operand has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:27,526 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:24:27,526 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 353 [2022-07-12 10:24:27,526 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:24:31,204 INFO L129 PetriNetUnfolder]: 2636/22931 cut-off events. [2022-07-12 10:24:31,210 INFO L130 PetriNetUnfolder]: For 13048/13767 co-relation queries the response was YES. [2022-07-12 10:24:31,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40167 conditions, 22931 events. 2636/22931 cut-off events. For 13048/13767 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 311580 event pairs, 1057 based on Foata normal form. 42/21332 useless extension candidates. Maximal degree in co-relation 40110. Up to 2503 conditions per place. [2022-07-12 10:24:31,422 INFO L132 encePairwiseOnDemand]: 349/353 looper letters, 51 selfloop transitions, 3 changer transitions 0/452 dead transitions. [2022-07-12 10:24:31,422 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 452 transitions, 1912 flow [2022-07-12 10:24:31,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:24:31,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:24:31,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 969 transitions. [2022-07-12 10:24:31,423 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9150141643059491 [2022-07-12 10:24:31,423 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 969 transitions. [2022-07-12 10:24:31,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 969 transitions. [2022-07-12 10:24:31,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:24:31,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 969 transitions. [2022-07-12 10:24:31,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:31,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:31,425 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:31,425 INFO L186 Difference]: Start difference. First operand has 429 places, 435 transitions, 1744 flow. Second operand 3 states and 969 transitions. [2022-07-12 10:24:31,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 452 transitions, 1912 flow [2022-07-12 10:24:31,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 452 transitions, 1899 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-07-12 10:24:31,720 INFO L242 Difference]: Finished difference. Result has 430 places, 437 transitions, 1753 flow [2022-07-12 10:24:31,720 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1731, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1753, PETRI_PLACES=430, PETRI_TRANSITIONS=437} [2022-07-12 10:24:31,721 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 116 predicate places. [2022-07-12 10:24:31,721 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 437 transitions, 1753 flow [2022-07-12 10:24:31,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:31,721 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:24:31,721 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:24:31,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-12 10:24:31,722 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:24:31,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:24:31,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1195815087, now seen corresponding path program 1 times [2022-07-12 10:24:31,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:24:31,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799548238] [2022-07-12 10:24:31,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:31,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:24:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 10:24:31,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:24:31,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799548238] [2022-07-12 10:24:31,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799548238] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:24:31,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:24:31,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:24:31,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427620922] [2022-07-12 10:24:31,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:24:31,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:24:31,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:24:31,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:24:31,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:24:31,777 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 353 [2022-07-12 10:24:31,778 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 437 transitions, 1753 flow. Second operand has 6 states, 6 states have (on average 316.8333333333333) internal successors, (1901), 6 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:31,779 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:24:31,779 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 353 [2022-07-12 10:24:31,779 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:24:34,546 INFO L129 PetriNetUnfolder]: 1584/15283 cut-off events. [2022-07-12 10:24:34,546 INFO L130 PetriNetUnfolder]: For 7548/7612 co-relation queries the response was YES. [2022-07-12 10:24:34,675 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26643 conditions, 15283 events. 1584/15283 cut-off events. For 7548/7612 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 196709 event pairs, 565 based on Foata normal form. 93/14094 useless extension candidates. Maximal degree in co-relation 26585. Up to 1983 conditions per place. [2022-07-12 10:24:34,702 INFO L132 encePairwiseOnDemand]: 341/353 looper letters, 48 selfloop transitions, 13 changer transitions 0/460 dead transitions. [2022-07-12 10:24:34,702 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 460 transitions, 1961 flow [2022-07-12 10:24:34,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:24:34,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:24:34,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2247 transitions. [2022-07-12 10:24:34,704 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9093484419263456 [2022-07-12 10:24:34,704 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2247 transitions. [2022-07-12 10:24:34,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2247 transitions. [2022-07-12 10:24:34,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:24:34,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2247 transitions. [2022-07-12 10:24:34,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 321.0) internal successors, (2247), 7 states have internal predecessors, (2247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:34,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 353.0) internal successors, (2824), 8 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:34,708 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 353.0) internal successors, (2824), 8 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:34,708 INFO L186 Difference]: Start difference. First operand has 430 places, 437 transitions, 1753 flow. Second operand 7 states and 2247 transitions. [2022-07-12 10:24:34,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 460 transitions, 1961 flow [2022-07-12 10:24:34,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 460 transitions, 1955 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-12 10:24:34,754 INFO L242 Difference]: Finished difference. Result has 439 places, 447 transitions, 1860 flow [2022-07-12 10:24:34,755 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1747, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1860, PETRI_PLACES=439, PETRI_TRANSITIONS=447} [2022-07-12 10:24:34,755 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 125 predicate places. [2022-07-12 10:24:34,755 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 447 transitions, 1860 flow [2022-07-12 10:24:34,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 316.8333333333333) internal successors, (1901), 6 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:34,755 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:24:34,756 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:24:34,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-12 10:24:34,756 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:24:34,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:24:34,756 INFO L85 PathProgramCache]: Analyzing trace with hash 315906300, now seen corresponding path program 1 times [2022-07-12 10:24:34,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:24:34,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623686764] [2022-07-12 10:24:34,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:34,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:24:34,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 10:24:34,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:24:34,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623686764] [2022-07-12 10:24:34,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623686764] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:24:34,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:24:34,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:24:34,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260930560] [2022-07-12 10:24:34,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:24:34,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:24:34,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:24:34,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:24:34,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:24:34,830 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 353 [2022-07-12 10:24:34,831 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 447 transitions, 1860 flow. Second operand has 8 states, 8 states have (on average 282.0) internal successors, (2256), 8 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:34,831 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:24:34,831 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 353 [2022-07-12 10:24:34,831 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:24:44,515 INFO L129 PetriNetUnfolder]: 9963/57728 cut-off events. [2022-07-12 10:24:44,515 INFO L130 PetriNetUnfolder]: For 51109/51720 co-relation queries the response was YES. [2022-07-12 10:24:45,593 INFO L84 FinitePrefix]: Finished finitePrefix Result has 113426 conditions, 57728 events. 9963/57728 cut-off events. For 51109/51720 co-relation queries the response was YES. Maximal size of possible extension queue 821. Compared 821789 event pairs, 3671 based on Foata normal form. 485/53816 useless extension candidates. Maximal degree in co-relation 113363. Up to 8820 conditions per place. [2022-07-12 10:24:45,714 INFO L132 encePairwiseOnDemand]: 332/353 looper letters, 286 selfloop transitions, 86 changer transitions 20/717 dead transitions. [2022-07-12 10:24:45,714 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 717 transitions, 3922 flow [2022-07-12 10:24:45,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 10:24:45,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-12 10:24:45,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 5607 transitions. [2022-07-12 10:24:45,718 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8359922469062174 [2022-07-12 10:24:45,718 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 5607 transitions. [2022-07-12 10:24:45,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 5607 transitions. [2022-07-12 10:24:45,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:24:45,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 5607 transitions. [2022-07-12 10:24:45,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 295.10526315789474) internal successors, (5607), 19 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:45,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 353.0) internal successors, (7060), 20 states have internal predecessors, (7060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:45,728 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 353.0) internal successors, (7060), 20 states have internal predecessors, (7060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:45,729 INFO L186 Difference]: Start difference. First operand has 439 places, 447 transitions, 1860 flow. Second operand 19 states and 5607 transitions. [2022-07-12 10:24:45,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 717 transitions, 3922 flow [2022-07-12 10:24:46,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 717 transitions, 3868 flow, removed 18 selfloop flow, removed 6 redundant places. [2022-07-12 10:24:46,178 INFO L242 Difference]: Finished difference. Result has 455 places, 487 transitions, 2271 flow [2022-07-12 10:24:46,178 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2271, PETRI_PLACES=455, PETRI_TRANSITIONS=487} [2022-07-12 10:24:46,179 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 141 predicate places. [2022-07-12 10:24:46,179 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 487 transitions, 2271 flow [2022-07-12 10:24:46,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 282.0) internal successors, (2256), 8 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:46,179 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:24:46,180 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:24:46,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-12 10:24:46,180 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:24:46,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:24:46,180 INFO L85 PathProgramCache]: Analyzing trace with hash 899792024, now seen corresponding path program 1 times [2022-07-12 10:24:46,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:24:46,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654031097] [2022-07-12 10:24:46,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:46,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:24:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 10:24:46,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:24:46,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654031097] [2022-07-12 10:24:46,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654031097] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:24:46,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:24:46,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:24:46,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624243898] [2022-07-12 10:24:46,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:24:46,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:24:46,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:24:46,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:24:46,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:24:46,239 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 353 [2022-07-12 10:24:46,240 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 487 transitions, 2271 flow. Second operand has 8 states, 8 states have (on average 276.75) internal successors, (2214), 8 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:46,240 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:24:46,240 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 353 [2022-07-12 10:24:46,240 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:24:54,402 INFO L129 PetriNetUnfolder]: 9659/46053 cut-off events. [2022-07-12 10:24:54,403 INFO L130 PetriNetUnfolder]: For 41549/42545 co-relation queries the response was YES. [2022-07-12 10:24:55,250 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93411 conditions, 46053 events. 9659/46053 cut-off events. For 41549/42545 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 632056 event pairs, 4078 based on Foata normal form. 550/44778 useless extension candidates. Maximal degree in co-relation 93345. Up to 8620 conditions per place. [2022-07-12 10:24:55,346 INFO L132 encePairwiseOnDemand]: 331/353 looper letters, 205 selfloop transitions, 43 changer transitions 120/672 dead transitions. [2022-07-12 10:24:55,346 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 672 transitions, 3663 flow [2022-07-12 10:24:55,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 10:24:55,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-12 10:24:55,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 5723 transitions. [2022-07-12 10:24:55,350 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8106232294617564 [2022-07-12 10:24:55,350 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 5723 transitions. [2022-07-12 10:24:55,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 5723 transitions. [2022-07-12 10:24:55,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:24:55,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 5723 transitions. [2022-07-12 10:24:55,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 286.15) internal successors, (5723), 20 states have internal predecessors, (5723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:55,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 353.0) internal successors, (7413), 21 states have internal predecessors, (7413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:55,362 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 353.0) internal successors, (7413), 21 states have internal predecessors, (7413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:55,362 INFO L186 Difference]: Start difference. First operand has 455 places, 487 transitions, 2271 flow. Second operand 20 states and 5723 transitions. [2022-07-12 10:24:55,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 672 transitions, 3663 flow [2022-07-12 10:24:55,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 672 transitions, 3420 flow, removed 42 selfloop flow, removed 14 redundant places. [2022-07-12 10:24:55,628 INFO L242 Difference]: Finished difference. Result has 464 places, 417 transitions, 1603 flow [2022-07-12 10:24:55,629 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1733, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1603, PETRI_PLACES=464, PETRI_TRANSITIONS=417} [2022-07-12 10:24:55,629 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 150 predicate places. [2022-07-12 10:24:55,629 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 417 transitions, 1603 flow [2022-07-12 10:24:55,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 276.75) internal successors, (2214), 8 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:55,630 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:24:55,630 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:24:55,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-12 10:24:55,630 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:24:55,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:24:55,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1678379906, now seen corresponding path program 1 times [2022-07-12 10:24:55,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:24:55,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380008831] [2022-07-12 10:24:55,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:24:55,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:24:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:24:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 10:24:55,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:24:55,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380008831] [2022-07-12 10:24:55,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380008831] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:24:55,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:24:55,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-12 10:24:55,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348320540] [2022-07-12 10:24:55,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:24:55,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 10:24:55,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:24:55,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 10:24:55,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-07-12 10:24:55,805 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 353 [2022-07-12 10:24:55,807 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 417 transitions, 1603 flow. Second operand has 17 states, 17 states have (on average 254.94117647058823) internal successors, (4334), 17 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:24:55,807 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:24:55,807 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 353 [2022-07-12 10:24:55,807 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand