./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 eb692b52 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-?-eb692b5 [2022-07-19 21:26:15,733 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:26:15,736 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:26:15,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:26:15,765 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:26:15,766 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:26:15,769 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:26:15,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:26:15,773 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:26:15,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:26:15,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:26:15,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:26:15,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:26:15,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:26:15,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:26:15,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:26:15,795 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:26:15,796 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:26:15,798 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:26:15,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:26:15,815 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:26:15,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:26:15,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:26:15,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:26:15,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:26:15,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:26:15,824 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:26:15,825 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:26:15,826 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:26:15,826 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:26:15,827 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:26:15,827 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:26:15,828 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:26:15,828 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:26:15,829 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:26:15,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:26:15,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:26:15,830 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:26:15,830 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:26:15,830 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:26:15,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:26:15,832 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:26:15,834 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:26:15,859 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:26:15,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:26:15,859 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:26:15,860 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:26:15,860 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:26:15,860 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:26:15,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:26:15,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:26:15,861 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:26:15,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:26:15,862 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:26:15,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:26:15,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:26:15,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:26:15,862 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:26:15,862 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:26:15,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:26:15,863 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:26:15,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:26:15,863 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:26:15,863 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:26:15,863 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:26:15,864 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:26:15,864 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:26:15,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:26:15,864 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:26:15,864 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:26:15,864 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:26:15,864 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:26:15,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:26:15,865 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:26:15,865 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:26:15,865 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:26:15,865 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 [2022-07-19 21:26:16,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:26:16,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:26:16,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:26:16,073 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:26:16,074 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:26:16,075 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2022-07-19 21:26:16,131 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06caaf17b/31549066d52341b080f4cf55b101825f/FLAG90328dcb9 [2022-07-19 21:26:16,497 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:26:16,497 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2022-07-19 21:26:16,502 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06caaf17b/31549066d52341b080f4cf55b101825f/FLAG90328dcb9 [2022-07-19 21:26:16,912 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06caaf17b/31549066d52341b080f4cf55b101825f [2022-07-19 21:26:16,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:26:16,915 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:26:16,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:26:16,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:26:16,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:26:16,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:26:16" (1/1) ... [2022-07-19 21:26:16,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e5560a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:26:16, skipping insertion in model container [2022-07-19 21:26:16,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:26:16" (1/1) ... [2022-07-19 21:26:16,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:26:16,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:26:17,082 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] [2022-07-19 21:26:17,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:26:17,094 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:26:17,116 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] [2022-07-19 21:26:17,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:26:17,127 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:26:17,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:26:17 WrapperNode [2022-07-19 21:26:17,128 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:26:17,128 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:26:17,128 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:26:17,128 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:26:17,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:26:17" (1/1) ... [2022-07-19 21:26:17,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:26:17" (1/1) ... [2022-07-19 21:26:17,162 INFO L137 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 278 [2022-07-19 21:26:17,167 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:26:17,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:26:17,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:26:17,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:26:17,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:26:17" (1/1) ... [2022-07-19 21:26:17,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:26:17" (1/1) ... [2022-07-19 21:26:17,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:26:17" (1/1) ... [2022-07-19 21:26:17,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:26:17" (1/1) ... [2022-07-19 21:26:17,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:26:17" (1/1) ... [2022-07-19 21:26:17,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:26:17" (1/1) ... [2022-07-19 21:26:17,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:26:17" (1/1) ... [2022-07-19 21:26:17,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:26:17,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:26:17,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:26:17,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:26:17,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:26:17" (1/1) ... [2022-07-19 21:26:17,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:26:17,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:26:17,229 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) [2022-07-19 21:26:17,237 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 [2022-07-19 21:26:17,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:26:17,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:26:17,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:26:17,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:26:17,260 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:26:17,260 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:26:17,260 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:26:17,260 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:26:17,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:26:17,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 21:26:17,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:26:17,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:26:17,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:26:17,262 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:26:17,355 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:26:17,356 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:26:17,662 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:26:17,671 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:26:17,671 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 21:26:17,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:26:17 BoogieIcfgContainer [2022-07-19 21:26:17,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:26:17,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:26:17,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:26:17,676 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:26:17,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:26:16" (1/3) ... [2022-07-19 21:26:17,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21472c0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:26:17, skipping insertion in model container [2022-07-19 21:26:17,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:26:17" (2/3) ... [2022-07-19 21:26:17,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21472c0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:26:17, skipping insertion in model container [2022-07-19 21:26:17,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:26:17" (3/3) ... [2022-07-19 21:26:17,679 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2022-07-19 21:26:17,682 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:26:17,688 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:26:17,691 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:26:17,691 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:26:17,769 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:26:17,806 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 325 places, 353 transitions, 722 flow [2022-07-19 21:26:17,903 INFO L129 PetriNetUnfolder]: 35/351 cut-off events. [2022-07-19 21:26:17,903 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:26:17,914 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. [2022-07-19 21:26:17,915 INFO L82 GeneralOperation]: Start removeDead. Operand has 325 places, 353 transitions, 722 flow [2022-07-19 21:26:17,925 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 314 places, 342 transitions, 696 flow [2022-07-19 21:26:17,939 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:26:17,944 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@55eb79da, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@388a6e7e [2022-07-19 21:26:17,945 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:26:17,991 INFO L129 PetriNetUnfolder]: 35/341 cut-off events. [2022-07-19 21:26:17,993 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:26:17,993 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:26:17,994 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] [2022-07-19 21:26:17,994 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:26:17,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:26:17,999 INFO L85 PathProgramCache]: Analyzing trace with hash 400884361, now seen corresponding path program 1 times [2022-07-19 21:26:18,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:26:18,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822897088] [2022-07-19 21:26:18,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:26:18,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:26:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:26:18,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:26:18,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:26:18,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822897088] [2022-07-19 21:26:18,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822897088] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:26:18,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:26:18,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:26:18,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846450530] [2022-07-19 21:26:18,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:26:18,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:26:18,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:26:18,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:26:18,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:26:18,261 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 353 [2022-07-19 21:26:18,264 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) [2022-07-19 21:26:18,264 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:26:18,264 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 353 [2022-07-19 21:26:18,265 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:26:18,316 INFO L129 PetriNetUnfolder]: 21/328 cut-off events. [2022-07-19 21:26:18,316 INFO L130 PetriNetUnfolder]: For 8/9 co-relation queries the response was YES. [2022-07-19 21:26:18,320 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. [2022-07-19 21:26:18,322 INFO L132 encePairwiseOnDemand]: 339/353 looper letters, 4 selfloop transitions, 0 changer transitions 3/328 dead transitions. [2022-07-19 21:26:18,322 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 328 transitions, 676 flow [2022-07-19 21:26:18,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:26:18,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:26:18,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 686 transitions. [2022-07-19 21:26:18,339 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9716713881019831 [2022-07-19 21:26:18,340 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 686 transitions. [2022-07-19 21:26:18,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 686 transitions. [2022-07-19 21:26:18,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:26:18,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 686 transitions. [2022-07-19 21:26:18,349 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) [2022-07-19 21:26:18,356 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) [2022-07-19 21:26:18,357 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) [2022-07-19 21:26:18,358 INFO L186 Difference]: Start difference. First operand has 314 places, 342 transitions, 696 flow. Second operand 2 states and 686 transitions. [2022-07-19 21:26:18,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 328 transitions, 676 flow [2022-07-19 21:26:18,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 328 transitions, 668 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:26:18,371 INFO L242 Difference]: Finished difference. Result has 311 places, 325 transitions, 654 flow [2022-07-19 21:26:18,373 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} [2022-07-19 21:26:18,377 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, -3 predicate places. [2022-07-19 21:26:18,377 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 325 transitions, 654 flow [2022-07-19 21:26:18,378 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) [2022-07-19 21:26:18,378 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:26:18,378 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] [2022-07-19 21:26:18,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:26:18,379 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:26:18,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:26:18,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1831147785, now seen corresponding path program 1 times [2022-07-19 21:26:18,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:26:18,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295976018] [2022-07-19 21:26:18,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:26:18,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:26:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:26:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:26:18,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:26:18,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295976018] [2022-07-19 21:26:18,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295976018] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:26:18,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:26:18,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:26:18,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151529072] [2022-07-19 21:26:18,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:26:18,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:26:18,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:26:18,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:26:18,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:26:18,544 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 353 [2022-07-19 21:26:18,546 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) [2022-07-19 21:26:18,546 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:26:18,546 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 353 [2022-07-19 21:26:18,546 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:26:18,676 INFO L129 PetriNetUnfolder]: 61/565 cut-off events. [2022-07-19 21:26:18,676 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:26:18,680 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. [2022-07-19 21:26:18,684 INFO L132 encePairwiseOnDemand]: 341/353 looper letters, 27 selfloop transitions, 11 changer transitions 0/340 dead transitions. [2022-07-19 21:26:18,684 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 340 transitions, 764 flow [2022-07-19 21:26:18,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:26:18,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:26:18,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1299 transitions. [2022-07-19 21:26:18,688 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.919971671388102 [2022-07-19 21:26:18,689 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1299 transitions. [2022-07-19 21:26:18,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1299 transitions. [2022-07-19 21:26:18,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:26:18,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1299 transitions. [2022-07-19 21:26:18,692 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) [2022-07-19 21:26:18,695 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) [2022-07-19 21:26:18,696 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) [2022-07-19 21:26:18,696 INFO L186 Difference]: Start difference. First operand has 311 places, 325 transitions, 654 flow. Second operand 4 states and 1299 transitions. [2022-07-19 21:26:18,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 340 transitions, 764 flow [2022-07-19 21:26:18,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 340 transitions, 764 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:26:18,713 INFO L242 Difference]: Finished difference. Result has 314 places, 331 transitions, 724 flow [2022-07-19 21:26:18,714 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} [2022-07-19 21:26:18,714 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 0 predicate places. [2022-07-19 21:26:18,715 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 331 transitions, 724 flow [2022-07-19 21:26:18,715 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) [2022-07-19 21:26:18,716 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:26:18,716 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] [2022-07-19 21:26:18,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:26:18,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:26:18,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:26:18,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1892940965, now seen corresponding path program 1 times [2022-07-19 21:26:18,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:26:18,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897661878] [2022-07-19 21:26:18,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:26:18,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:26:18,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:26:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:26:18,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:26:18,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897661878] [2022-07-19 21:26:18,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897661878] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:26:18,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:26:18,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:26:18,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765350608] [2022-07-19 21:26:18,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:26:18,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:26:18,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:26:18,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:26:18,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:26:18,800 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 353 [2022-07-19 21:26:18,801 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) [2022-07-19 21:26:18,801 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:26:18,801 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 353 [2022-07-19 21:26:18,802 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:26:19,324 INFO L129 PetriNetUnfolder]: 848/4653 cut-off events. [2022-07-19 21:26:19,324 INFO L130 PetriNetUnfolder]: For 362/374 co-relation queries the response was YES. [2022-07-19 21:26:19,337 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. [2022-07-19 21:26:19,349 INFO L132 encePairwiseOnDemand]: 345/353 looper letters, 57 selfloop transitions, 4 changer transitions 0/357 dead transitions. [2022-07-19 21:26:19,350 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 357 transitions, 911 flow [2022-07-19 21:26:19,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:26:19,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:26:19,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 975 transitions. [2022-07-19 21:26:19,352 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9206798866855525 [2022-07-19 21:26:19,352 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 975 transitions. [2022-07-19 21:26:19,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 975 transitions. [2022-07-19 21:26:19,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:26:19,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 975 transitions. [2022-07-19 21:26:19,354 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) [2022-07-19 21:26:19,356 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) [2022-07-19 21:26:19,358 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) [2022-07-19 21:26:19,358 INFO L186 Difference]: Start difference. First operand has 314 places, 331 transitions, 724 flow. Second operand 3 states and 975 transitions. [2022-07-19 21:26:19,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 357 transitions, 911 flow [2022-07-19 21:26:19,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 357 transitions, 911 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:26:19,398 INFO L242 Difference]: Finished difference. Result has 318 places, 335 transitions, 764 flow [2022-07-19 21:26:19,399 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} [2022-07-19 21:26:19,399 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 4 predicate places. [2022-07-19 21:26:19,400 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 335 transitions, 764 flow [2022-07-19 21:26:19,400 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) [2022-07-19 21:26:19,400 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:26:19,400 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] [2022-07-19 21:26:19,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:26:19,401 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:26:19,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:26:19,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1952454215, now seen corresponding path program 1 times [2022-07-19 21:26:19,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:26:19,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711230968] [2022-07-19 21:26:19,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:26:19,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:26:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:26:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:26:19,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:26:19,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711230968] [2022-07-19 21:26:19,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711230968] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:26:19,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:26:19,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:26:19,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747076912] [2022-07-19 21:26:19,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:26:19,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:26:19,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:26:19,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:26:19,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:26:19,481 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 353 [2022-07-19 21:26:19,482 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) [2022-07-19 21:26:19,482 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:26:19,482 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 353 [2022-07-19 21:26:19,482 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:26:19,917 INFO L129 PetriNetUnfolder]: 648/4102 cut-off events. [2022-07-19 21:26:19,918 INFO L130 PetriNetUnfolder]: For 527/541 co-relation queries the response was YES. [2022-07-19 21:26:19,927 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. [2022-07-19 21:26:19,935 INFO L132 encePairwiseOnDemand]: 347/353 looper letters, 59 selfloop transitions, 2 changer transitions 0/357 dead transitions. [2022-07-19 21:26:19,936 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 357 transitions, 939 flow [2022-07-19 21:26:19,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:26:19,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:26:19,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 973 transitions. [2022-07-19 21:26:19,938 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9187913125590179 [2022-07-19 21:26:19,938 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 973 transitions. [2022-07-19 21:26:19,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 973 transitions. [2022-07-19 21:26:19,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:26:19,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 973 transitions. [2022-07-19 21:26:19,940 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) [2022-07-19 21:26:19,942 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) [2022-07-19 21:26:19,945 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) [2022-07-19 21:26:19,945 INFO L186 Difference]: Start difference. First operand has 318 places, 335 transitions, 764 flow. Second operand 3 states and 973 transitions. [2022-07-19 21:26:19,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 357 transitions, 939 flow [2022-07-19 21:26:19,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 357 transitions, 937 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:26:19,951 INFO L242 Difference]: Finished difference. Result has 321 places, 335 transitions, 774 flow [2022-07-19 21:26:19,951 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} [2022-07-19 21:26:19,952 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 7 predicate places. [2022-07-19 21:26:19,952 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 335 transitions, 774 flow [2022-07-19 21:26:19,953 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) [2022-07-19 21:26:19,955 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:26:19,955 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] [2022-07-19 21:26:19,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:26:19,955 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:26:19,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:26:19,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1351251233, now seen corresponding path program 1 times [2022-07-19 21:26:19,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:26:19,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262060592] [2022-07-19 21:26:19,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:26:19,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:26:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:26:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:26:20,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:26:20,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262060592] [2022-07-19 21:26:20,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262060592] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:26:20,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:26:20,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:26:20,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127131341] [2022-07-19 21:26:20,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:26:20,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:26:20,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:26:20,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:26:20,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:26:20,055 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 353 [2022-07-19 21:26:20,057 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) [2022-07-19 21:26:20,057 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:26:20,057 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 353 [2022-07-19 21:26:20,057 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:26:20,243 INFO L129 PetriNetUnfolder]: 132/1424 cut-off events. [2022-07-19 21:26:20,243 INFO L130 PetriNetUnfolder]: For 49/62 co-relation queries the response was YES. [2022-07-19 21:26:20,251 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. [2022-07-19 21:26:20,255 INFO L132 encePairwiseOnDemand]: 342/353 looper letters, 30 selfloop transitions, 9 changer transitions 0/352 dead transitions. [2022-07-19 21:26:20,255 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 352 transitions, 892 flow [2022-07-19 21:26:20,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:26:20,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:26:20,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1937 transitions. [2022-07-19 21:26:20,259 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9145420207743153 [2022-07-19 21:26:20,259 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1937 transitions. [2022-07-19 21:26:20,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1937 transitions. [2022-07-19 21:26:20,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:26:20,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1937 transitions. [2022-07-19 21:26:20,264 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) [2022-07-19 21:26:20,267 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) [2022-07-19 21:26:20,268 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) [2022-07-19 21:26:20,268 INFO L186 Difference]: Start difference. First operand has 321 places, 335 transitions, 774 flow. Second operand 6 states and 1937 transitions. [2022-07-19 21:26:20,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 352 transitions, 892 flow [2022-07-19 21:26:20,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 352 transitions, 890 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:26:20,277 INFO L242 Difference]: Finished difference. Result has 329 places, 341 transitions, 831 flow [2022-07-19 21:26:20,278 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} [2022-07-19 21:26:20,279 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 15 predicate places. [2022-07-19 21:26:20,279 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 341 transitions, 831 flow [2022-07-19 21:26:20,280 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) [2022-07-19 21:26:20,281 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:26:20,281 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] [2022-07-19 21:26:20,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:26:20,281 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:26:20,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:26:20,282 INFO L85 PathProgramCache]: Analyzing trace with hash -544975579, now seen corresponding path program 1 times [2022-07-19 21:26:20,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:26:20,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700819216] [2022-07-19 21:26:20,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:26:20,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:26:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:26:20,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:26:20,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:26:20,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700819216] [2022-07-19 21:26:20,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700819216] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:26:20,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:26:20,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:26:20,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432009883] [2022-07-19 21:26:20,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:26:20,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:26:20,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:26:20,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:26:20,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:26:20,350 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 353 [2022-07-19 21:26:20,352 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) [2022-07-19 21:26:20,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:26:20,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 353 [2022-07-19 21:26:20,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:26:20,643 INFO L129 PetriNetUnfolder]: 211/2381 cut-off events. [2022-07-19 21:26:20,643 INFO L130 PetriNetUnfolder]: For 132/143 co-relation queries the response was YES. [2022-07-19 21:26:20,654 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. [2022-07-19 21:26:20,660 INFO L132 encePairwiseOnDemand]: 342/353 looper letters, 29 selfloop transitions, 9 changer transitions 0/357 dead transitions. [2022-07-19 21:26:20,660 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 357 transitions, 944 flow [2022-07-19 21:26:20,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:26:20,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:26:20,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1936 transitions. [2022-07-19 21:26:20,663 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9140698772426817 [2022-07-19 21:26:20,663 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1936 transitions. [2022-07-19 21:26:20,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1936 transitions. [2022-07-19 21:26:20,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:26:20,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1936 transitions. [2022-07-19 21:26:20,667 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) [2022-07-19 21:26:20,669 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) [2022-07-19 21:26:20,669 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) [2022-07-19 21:26:20,670 INFO L186 Difference]: Start difference. First operand has 329 places, 341 transitions, 831 flow. Second operand 6 states and 1936 transitions. [2022-07-19 21:26:20,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 357 transitions, 944 flow [2022-07-19 21:26:20,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 357 transitions, 939 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:26:20,675 INFO L242 Difference]: Finished difference. Result has 337 places, 347 transitions, 885 flow [2022-07-19 21:26:20,675 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} [2022-07-19 21:26:20,676 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 23 predicate places. [2022-07-19 21:26:20,676 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 347 transitions, 885 flow [2022-07-19 21:26:20,677 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) [2022-07-19 21:26:20,677 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:26:20,677 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] [2022-07-19 21:26:20,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:26:20,677 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:26:20,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:26:20,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1786217094, now seen corresponding path program 1 times [2022-07-19 21:26:20,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:26:20,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774114061] [2022-07-19 21:26:20,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:26:20,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:26:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:26:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:26:20,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:26:20,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774114061] [2022-07-19 21:26:20,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774114061] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:26:20,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:26:20,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:26:20,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229493486] [2022-07-19 21:26:20,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:26:20,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:26:20,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:26:20,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:26:20,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:26:20,733 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 353 [2022-07-19 21:26:20,734 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) [2022-07-19 21:26:20,734 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:26:20,735 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 353 [2022-07-19 21:26:20,735 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:26:20,949 INFO L129 PetriNetUnfolder]: 110/1717 cut-off events. [2022-07-19 21:26:20,950 INFO L130 PetriNetUnfolder]: For 75/87 co-relation queries the response was YES. [2022-07-19 21:26:20,959 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. [2022-07-19 21:26:20,964 INFO L132 encePairwiseOnDemand]: 348/353 looper letters, 16 selfloop transitions, 4 changer transitions 0/351 dead transitions. [2022-07-19 21:26:20,964 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 351 transitions, 933 flow [2022-07-19 21:26:20,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:26:20,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:26:20,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1631 transitions. [2022-07-19 21:26:20,967 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9240793201133144 [2022-07-19 21:26:20,968 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1631 transitions. [2022-07-19 21:26:20,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1631 transitions. [2022-07-19 21:26:20,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:26:20,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1631 transitions. [2022-07-19 21:26:20,971 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) [2022-07-19 21:26:20,974 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) [2022-07-19 21:26:20,976 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) [2022-07-19 21:26:20,976 INFO L186 Difference]: Start difference. First operand has 337 places, 347 transitions, 885 flow. Second operand 5 states and 1631 transitions. [2022-07-19 21:26:20,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 351 transitions, 933 flow [2022-07-19 21:26:20,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 351 transitions, 928 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:26:20,981 INFO L242 Difference]: Finished difference. Result has 341 places, 348 transitions, 896 flow [2022-07-19 21:26:20,982 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} [2022-07-19 21:26:20,982 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 27 predicate places. [2022-07-19 21:26:20,983 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 348 transitions, 896 flow [2022-07-19 21:26:20,983 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) [2022-07-19 21:26:20,983 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:26:20,984 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] [2022-07-19 21:26:20,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:26:20,984 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:26:20,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:26:20,984 INFO L85 PathProgramCache]: Analyzing trace with hash 20910411, now seen corresponding path program 1 times [2022-07-19 21:26:20,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:26:20,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366674394] [2022-07-19 21:26:20,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:26:20,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:26:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:26:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:26:21,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:26:21,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366674394] [2022-07-19 21:26:21,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366674394] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:26:21,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766679903] [2022-07-19 21:26:21,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:26:21,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:26:21,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:26:21,045 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) [2022-07-19 21:26:21,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:26:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:26:21,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 21:26:21,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:26:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:26:21,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:26:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:26:21,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766679903] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:26:21,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:26:21,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-07-19 21:26:21,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922833379] [2022-07-19 21:26:21,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:26:21,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:26:21,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:26:21,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:26:21,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:26:21,354 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 353 [2022-07-19 21:26:21,357 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) [2022-07-19 21:26:21,357 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:26:21,357 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 353 [2022-07-19 21:26:21,357 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:26:21,613 INFO L129 PetriNetUnfolder]: 110/1726 cut-off events. [2022-07-19 21:26:21,613 INFO L130 PetriNetUnfolder]: For 76/88 co-relation queries the response was YES. [2022-07-19 21:26:21,625 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. [2022-07-19 21:26:21,629 INFO L132 encePairwiseOnDemand]: 345/353 looper letters, 17 selfloop transitions, 11 changer transitions 0/358 dead transitions. [2022-07-19 21:26:21,629 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 358 transitions, 974 flow [2022-07-19 21:26:21,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:26:21,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:26:21,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3561 transitions. [2022-07-19 21:26:21,635 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9170744269894412 [2022-07-19 21:26:21,635 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3561 transitions. [2022-07-19 21:26:21,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3561 transitions. [2022-07-19 21:26:21,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:26:21,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3561 transitions. [2022-07-19 21:26:21,641 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) [2022-07-19 21:26:21,675 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) [2022-07-19 21:26:21,676 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) [2022-07-19 21:26:21,677 INFO L186 Difference]: Start difference. First operand has 341 places, 348 transitions, 896 flow. Second operand 11 states and 3561 transitions. [2022-07-19 21:26:21,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 358 transitions, 974 flow [2022-07-19 21:26:21,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 358 transitions, 968 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:26:21,682 INFO L242 Difference]: Finished difference. Result has 351 places, 354 transitions, 945 flow [2022-07-19 21:26:21,683 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} [2022-07-19 21:26:21,683 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 37 predicate places. [2022-07-19 21:26:21,683 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 354 transitions, 945 flow [2022-07-19 21:26:21,685 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) [2022-07-19 21:26:21,685 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:26:21,685 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] [2022-07-19 21:26:21,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:26:21,899 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 [2022-07-19 21:26:21,900 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:26:21,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:26:21,900 INFO L85 PathProgramCache]: Analyzing trace with hash -523708949, now seen corresponding path program 2 times [2022-07-19 21:26:21,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:26:21,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465708790] [2022-07-19 21:26:21,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:26:21,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:26:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:26:21,981 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 21:26:21,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:26:21,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465708790] [2022-07-19 21:26:21,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465708790] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:26:21,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:26:21,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:26:21,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866252959] [2022-07-19 21:26:21,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:26:21,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:26:21,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:26:21,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:26:21,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:26:21,985 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 353 [2022-07-19 21:26:21,987 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) [2022-07-19 21:26:21,987 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:26:21,987 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 353 [2022-07-19 21:26:21,987 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:26:22,244 INFO L129 PetriNetUnfolder]: 111/1830 cut-off events. [2022-07-19 21:26:22,245 INFO L130 PetriNetUnfolder]: For 78/90 co-relation queries the response was YES. [2022-07-19 21:26:22,258 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. [2022-07-19 21:26:22,262 INFO L132 encePairwiseOnDemand]: 344/353 looper letters, 35 selfloop transitions, 4 changer transitions 5/369 dead transitions. [2022-07-19 21:26:22,262 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 369 transitions, 1063 flow [2022-07-19 21:26:22,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:26:22,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:26:22,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2493 transitions. [2022-07-19 21:26:22,266 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8827903682719547 [2022-07-19 21:26:22,266 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2493 transitions. [2022-07-19 21:26:22,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2493 transitions. [2022-07-19 21:26:22,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:26:22,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2493 transitions. [2022-07-19 21:26:22,270 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) [2022-07-19 21:26:22,273 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) [2022-07-19 21:26:22,274 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) [2022-07-19 21:26:22,274 INFO L186 Difference]: Start difference. First operand has 351 places, 354 transitions, 945 flow. Second operand 8 states and 2493 transitions. [2022-07-19 21:26:22,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 369 transitions, 1063 flow [2022-07-19 21:26:22,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 369 transitions, 1054 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-19 21:26:22,281 INFO L242 Difference]: Finished difference. Result has 361 places, 357 transitions, 972 flow [2022-07-19 21:26:22,282 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} [2022-07-19 21:26:22,282 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 47 predicate places. [2022-07-19 21:26:22,282 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 357 transitions, 972 flow [2022-07-19 21:26:22,283 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) [2022-07-19 21:26:22,283 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:26:22,283 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] [2022-07-19 21:26:22,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 21:26:22,284 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:26:22,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:26:22,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1163854113, now seen corresponding path program 1 times [2022-07-19 21:26:22,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:26:22,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461426078] [2022-07-19 21:26:22,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:26:22,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:26:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:26:22,325 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 21:26:22,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:26:22,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461426078] [2022-07-19 21:26:22,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461426078] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:26:22,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:26:22,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:26:22,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558533] [2022-07-19 21:26:22,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:26:22,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:26:22,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:26:22,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:26:22,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:26:22,331 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 353 [2022-07-19 21:26:22,332 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) [2022-07-19 21:26:22,332 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:26:22,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 353 [2022-07-19 21:26:22,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:26:22,709 INFO L129 PetriNetUnfolder]: 293/2938 cut-off events. [2022-07-19 21:26:22,710 INFO L130 PetriNetUnfolder]: For 213/224 co-relation queries the response was YES. [2022-07-19 21:26:22,731 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. [2022-07-19 21:26:22,738 INFO L132 encePairwiseOnDemand]: 341/353 looper letters, 26 selfloop transitions, 11 changer transitions 0/371 dead transitions. [2022-07-19 21:26:22,739 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 371 transitions, 1077 flow [2022-07-19 21:26:22,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:26:22,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:26:22,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1298 transitions. [2022-07-19 21:26:22,741 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9192634560906515 [2022-07-19 21:26:22,741 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1298 transitions. [2022-07-19 21:26:22,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1298 transitions. [2022-07-19 21:26:22,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:26:22,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1298 transitions. [2022-07-19 21:26:22,744 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) [2022-07-19 21:26:22,746 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) [2022-07-19 21:26:22,746 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) [2022-07-19 21:26:22,746 INFO L186 Difference]: Start difference. First operand has 361 places, 357 transitions, 972 flow. Second operand 4 states and 1298 transitions. [2022-07-19 21:26:22,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 371 transitions, 1077 flow [2022-07-19 21:26:22,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 371 transitions, 1067 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-07-19 21:26:22,754 INFO L242 Difference]: Finished difference. Result has 358 places, 363 transitions, 1032 flow [2022-07-19 21:26:22,754 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} [2022-07-19 21:26:22,755 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 44 predicate places. [2022-07-19 21:26:22,755 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 363 transitions, 1032 flow [2022-07-19 21:26:22,755 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) [2022-07-19 21:26:22,755 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:26:22,756 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] [2022-07-19 21:26:22,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 21:26:22,756 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:26:22,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:26:22,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1467056166, now seen corresponding path program 1 times [2022-07-19 21:26:22,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:26:22,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486795687] [2022-07-19 21:26:22,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:26:22,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:26:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:26:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 21:26:22,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:26:22,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486795687] [2022-07-19 21:26:22,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486795687] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:26:22,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:26:22,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:26:22,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339396697] [2022-07-19 21:26:22,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:26:22,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:26:22,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:26:22,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:26:22,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:26:22,796 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 353 [2022-07-19 21:26:22,797 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) [2022-07-19 21:26:22,797 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:26:22,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 353 [2022-07-19 21:26:22,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:26:23,085 INFO L129 PetriNetUnfolder]: 176/2079 cut-off events. [2022-07-19 21:26:23,085 INFO L130 PetriNetUnfolder]: For 171/302 co-relation queries the response was YES. [2022-07-19 21:26:23,106 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. [2022-07-19 21:26:23,113 INFO L132 encePairwiseOnDemand]: 348/353 looper letters, 35 selfloop transitions, 4 changer transitions 0/372 dead transitions. [2022-07-19 21:26:23,113 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 372 transitions, 1135 flow [2022-07-19 21:26:23,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:26:23,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:26:23,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1611 transitions. [2022-07-19 21:26:23,117 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9127478753541076 [2022-07-19 21:26:23,117 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1611 transitions. [2022-07-19 21:26:23,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1611 transitions. [2022-07-19 21:26:23,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:26:23,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1611 transitions. [2022-07-19 21:26:23,121 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) [2022-07-19 21:26:23,124 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) [2022-07-19 21:26:23,124 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) [2022-07-19 21:26:23,124 INFO L186 Difference]: Start difference. First operand has 358 places, 363 transitions, 1032 flow. Second operand 5 states and 1611 transitions. [2022-07-19 21:26:23,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 372 transitions, 1135 flow [2022-07-19 21:26:23,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 372 transitions, 1133 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-19 21:26:23,133 INFO L242 Difference]: Finished difference. Result has 363 places, 363 transitions, 1044 flow [2022-07-19 21:26:23,134 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} [2022-07-19 21:26:23,134 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 49 predicate places. [2022-07-19 21:26:23,135 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 363 transitions, 1044 flow [2022-07-19 21:26:23,135 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) [2022-07-19 21:26:23,135 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:26:23,136 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] [2022-07-19 21:26:23,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 21:26:23,136 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:26:23,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:26:23,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1559069933, now seen corresponding path program 1 times [2022-07-19 21:26:23,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:26:23,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471065530] [2022-07-19 21:26:23,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:26:23,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:26:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:26:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 21:26:23,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:26:23,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471065530] [2022-07-19 21:26:23,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471065530] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:26:23,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:26:23,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:26:23,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701785411] [2022-07-19 21:26:23,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:26:23,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:26:23,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:26:23,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:26:23,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:26:23,184 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 353 [2022-07-19 21:26:23,186 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) [2022-07-19 21:26:23,186 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:26:23,186 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 353 [2022-07-19 21:26:23,186 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:26:24,382 INFO L129 PetriNetUnfolder]: 1757/9306 cut-off events. [2022-07-19 21:26:24,382 INFO L130 PetriNetUnfolder]: For 3062/3087 co-relation queries the response was YES. [2022-07-19 21:26:24,416 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. [2022-07-19 21:26:24,438 INFO L132 encePairwiseOnDemand]: 343/353 looper letters, 184 selfloop transitions, 36 changer transitions 0/527 dead transitions. [2022-07-19 21:26:24,438 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 527 transitions, 2115 flow [2022-07-19 21:26:24,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 21:26:24,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-19 21:26:24,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 5234 transitions. [2022-07-19 21:26:24,445 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.872187968671888 [2022-07-19 21:26:24,446 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 5234 transitions. [2022-07-19 21:26:24,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 5234 transitions. [2022-07-19 21:26:24,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:26:24,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 5234 transitions. [2022-07-19 21:26:24,454 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) [2022-07-19 21:26:24,460 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) [2022-07-19 21:26:24,461 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) [2022-07-19 21:26:24,461 INFO L186 Difference]: Start difference. First operand has 363 places, 363 transitions, 1044 flow. Second operand 17 states and 5234 transitions. [2022-07-19 21:26:24,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 527 transitions, 2115 flow [2022-07-19 21:26:24,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 527 transitions, 2093 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-07-19 21:26:24,477 INFO L242 Difference]: Finished difference. Result has 385 places, 391 transitions, 1302 flow [2022-07-19 21:26:24,477 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} [2022-07-19 21:26:24,478 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 71 predicate places. [2022-07-19 21:26:24,478 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 391 transitions, 1302 flow [2022-07-19 21:26:24,478 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) [2022-07-19 21:26:24,479 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:26:24,479 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] [2022-07-19 21:26:24,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 21:26:24,479 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:26:24,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:26:24,480 INFO L85 PathProgramCache]: Analyzing trace with hash 446122812, now seen corresponding path program 1 times [2022-07-19 21:26:24,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:26:24,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312318234] [2022-07-19 21:26:24,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:26:24,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:26:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:26:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 21:26:24,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:26:24,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312318234] [2022-07-19 21:26:24,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312318234] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:26:24,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:26:24,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:26:24,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404124323] [2022-07-19 21:26:24,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:26:24,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:26:24,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:26:24,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:26:24,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:26:24,513 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 353 [2022-07-19 21:26:24,514 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) [2022-07-19 21:26:24,514 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:26:24,514 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 353 [2022-07-19 21:26:24,514 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:26:25,699 INFO L129 PetriNetUnfolder]: 1134/9270 cut-off events. [2022-07-19 21:26:25,699 INFO L130 PetriNetUnfolder]: For 2880/2898 co-relation queries the response was YES. [2022-07-19 21:26:25,744 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. [2022-07-19 21:26:25,763 INFO L132 encePairwiseOnDemand]: 349/353 looper letters, 55 selfloop transitions, 3 changer transitions 0/412 dead transitions. [2022-07-19 21:26:25,764 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 412 transitions, 1493 flow [2022-07-19 21:26:25,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:26:25,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:26:25,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 972 transitions. [2022-07-19 21:26:25,766 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9178470254957507 [2022-07-19 21:26:25,766 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 972 transitions. [2022-07-19 21:26:25,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 972 transitions. [2022-07-19 21:26:25,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:26:25,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 972 transitions. [2022-07-19 21:26:25,768 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) [2022-07-19 21:26:25,769 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) [2022-07-19 21:26:25,769 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) [2022-07-19 21:26:25,770 INFO L186 Difference]: Start difference. First operand has 385 places, 391 transitions, 1302 flow. Second operand 3 states and 972 transitions. [2022-07-19 21:26:25,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 412 transitions, 1493 flow [2022-07-19 21:26:25,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 412 transitions, 1459 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-07-19 21:26:25,792 INFO L242 Difference]: Finished difference. Result has 385 places, 393 transitions, 1290 flow [2022-07-19 21:26:25,792 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} [2022-07-19 21:26:25,793 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 71 predicate places. [2022-07-19 21:26:25,793 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 393 transitions, 1290 flow [2022-07-19 21:26:25,793 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) [2022-07-19 21:26:25,793 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:26:25,794 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] [2022-07-19 21:26:25,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 21:26:25,794 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:26:25,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:26:25,795 INFO L85 PathProgramCache]: Analyzing trace with hash 2055578978, now seen corresponding path program 1 times [2022-07-19 21:26:25,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:26:25,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279259091] [2022-07-19 21:26:25,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:26:25,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:26:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:26:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 21:26:25,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:26:25,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279259091] [2022-07-19 21:26:25,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279259091] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:26:25,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:26:25,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:26:25,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047111840] [2022-07-19 21:26:25,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:26:25,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:26:25,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:26:25,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:26:25,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:26:25,840 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 353 [2022-07-19 21:26:25,841 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) [2022-07-19 21:26:25,841 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:26:25,841 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 353 [2022-07-19 21:26:25,841 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:26:26,307 INFO L129 PetriNetUnfolder]: 296/3307 cut-off events. [2022-07-19 21:26:26,307 INFO L130 PetriNetUnfolder]: For 740/946 co-relation queries the response was YES. [2022-07-19 21:26:26,330 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. [2022-07-19 21:26:26,337 INFO L132 encePairwiseOnDemand]: 343/353 looper letters, 44 selfloop transitions, 19 changer transitions 0/412 dead transitions. [2022-07-19 21:26:26,337 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 412 transitions, 1473 flow [2022-07-19 21:26:26,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:26:26,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:26:26,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2239 transitions. [2022-07-19 21:26:26,341 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9061108862808579 [2022-07-19 21:26:26,341 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2239 transitions. [2022-07-19 21:26:26,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2239 transitions. [2022-07-19 21:26:26,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:26:26,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2239 transitions. [2022-07-19 21:26:26,345 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) [2022-07-19 21:26:26,347 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) [2022-07-19 21:26:26,348 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) [2022-07-19 21:26:26,348 INFO L186 Difference]: Start difference. First operand has 385 places, 393 transitions, 1290 flow. Second operand 7 states and 2239 transitions. [2022-07-19 21:26:26,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 412 transitions, 1473 flow [2022-07-19 21:26:26,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 412 transitions, 1467 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:26:26,359 INFO L242 Difference]: Finished difference. Result has 392 places, 399 transitions, 1374 flow [2022-07-19 21:26:26,359 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} [2022-07-19 21:26:26,360 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 78 predicate places. [2022-07-19 21:26:26,360 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 399 transitions, 1374 flow [2022-07-19 21:26:26,360 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) [2022-07-19 21:26:26,360 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:26:26,361 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] [2022-07-19 21:26:26,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 21:26:26,361 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:26:26,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:26:26,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1907405474, now seen corresponding path program 1 times [2022-07-19 21:26:26,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:26:26,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620282379] [2022-07-19 21:26:26,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:26:26,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:26:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:26:26,389 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 21:26:26,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:26:26,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620282379] [2022-07-19 21:26:26,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620282379] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:26:26,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:26:26,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:26:26,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457110872] [2022-07-19 21:26:26,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:26:26,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:26:26,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:26:26,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:26:26,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:26:26,391 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 353 [2022-07-19 21:26:26,392 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) [2022-07-19 21:26:26,392 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:26:26,392 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 353 [2022-07-19 21:26:26,392 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:26:27,570 INFO L129 PetriNetUnfolder]: 1050/9717 cut-off events. [2022-07-19 21:26:27,570 INFO L130 PetriNetUnfolder]: For 3278/3323 co-relation queries the response was YES. [2022-07-19 21:26:27,611 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. [2022-07-19 21:26:27,702 INFO L132 encePairwiseOnDemand]: 350/353 looper letters, 53 selfloop transitions, 2 changer transitions 0/415 dead transitions. [2022-07-19 21:26:27,702 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 415 transitions, 1539 flow [2022-07-19 21:26:27,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:26:27,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:26:27,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 969 transitions. [2022-07-19 21:26:27,704 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9150141643059491 [2022-07-19 21:26:27,704 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 969 transitions. [2022-07-19 21:26:27,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 969 transitions. [2022-07-19 21:26:27,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:26:27,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 969 transitions. [2022-07-19 21:26:27,709 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) [2022-07-19 21:26:27,713 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) [2022-07-19 21:26:27,713 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) [2022-07-19 21:26:27,714 INFO L186 Difference]: Start difference. First operand has 392 places, 399 transitions, 1374 flow. Second operand 3 states and 969 transitions. [2022-07-19 21:26:27,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 415 transitions, 1539 flow [2022-07-19 21:26:27,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 415 transitions, 1521 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-07-19 21:26:27,737 INFO L242 Difference]: Finished difference. Result has 393 places, 399 transitions, 1364 flow [2022-07-19 21:26:27,738 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} [2022-07-19 21:26:27,739 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 79 predicate places. [2022-07-19 21:26:27,739 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 399 transitions, 1364 flow [2022-07-19 21:26:27,740 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) [2022-07-19 21:26:27,740 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:26:27,740 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] [2022-07-19 21:26:27,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 21:26:27,740 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:26:27,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:26:27,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1289922524, now seen corresponding path program 1 times [2022-07-19 21:26:27,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:26:27,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120438488] [2022-07-19 21:26:27,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:26:27,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:26:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:26:27,790 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 21:26:27,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:26:27,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120438488] [2022-07-19 21:26:27,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120438488] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:26:27,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:26:27,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:26:27,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359462290] [2022-07-19 21:26:27,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:26:27,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:26:27,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:26:27,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:26:27,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:26:27,794 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 353 [2022-07-19 21:26:27,795 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) [2022-07-19 21:26:27,795 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:26:27,795 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 353 [2022-07-19 21:26:27,795 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:26:28,435 INFO L129 PetriNetUnfolder]: 338/3933 cut-off events. [2022-07-19 21:26:28,435 INFO L130 PetriNetUnfolder]: For 813/1024 co-relation queries the response was YES. [2022-07-19 21:26:28,456 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. [2022-07-19 21:26:28,474 INFO L132 encePairwiseOnDemand]: 341/353 looper letters, 41 selfloop transitions, 12 changer transitions 0/424 dead transitions. [2022-07-19 21:26:28,475 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 424 transitions, 1539 flow [2022-07-19 21:26:28,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:26:28,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:26:28,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2248 transitions. [2022-07-19 21:26:28,478 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9097531363820316 [2022-07-19 21:26:28,478 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2248 transitions. [2022-07-19 21:26:28,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2248 transitions. [2022-07-19 21:26:28,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:26:28,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2248 transitions. [2022-07-19 21:26:28,482 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) [2022-07-19 21:26:28,484 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) [2022-07-19 21:26:28,485 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) [2022-07-19 21:26:28,486 INFO L186 Difference]: Start difference. First operand has 393 places, 399 transitions, 1364 flow. Second operand 7 states and 2248 transitions. [2022-07-19 21:26:28,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 424 transitions, 1539 flow [2022-07-19 21:26:28,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 424 transitions, 1537 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:26:28,497 INFO L242 Difference]: Finished difference. Result has 403 places, 410 transitions, 1461 flow [2022-07-19 21:26:28,498 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} [2022-07-19 21:26:28,498 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 89 predicate places. [2022-07-19 21:26:28,498 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 410 transitions, 1461 flow [2022-07-19 21:26:28,499 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) [2022-07-19 21:26:28,499 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:26:28,499 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] [2022-07-19 21:26:28,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 21:26:28,499 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:26:28,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:26:28,500 INFO L85 PathProgramCache]: Analyzing trace with hash 743740860, now seen corresponding path program 1 times [2022-07-19 21:26:28,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:26:28,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91087804] [2022-07-19 21:26:28,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:26:28,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:26:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:26:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 21:26:28,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:26:28,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91087804] [2022-07-19 21:26:28,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91087804] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:26:28,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:26:28,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:26:28,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135169048] [2022-07-19 21:26:28,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:26:28,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:26:28,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:26:28,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:26:28,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:26:28,564 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 353 [2022-07-19 21:26:28,565 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) [2022-07-19 21:26:28,565 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:26:28,566 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 353 [2022-07-19 21:26:28,566 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:26:29,345 INFO L129 PetriNetUnfolder]: 401/5034 cut-off events. [2022-07-19 21:26:29,345 INFO L130 PetriNetUnfolder]: For 1430/1843 co-relation queries the response was YES. [2022-07-19 21:26:29,376 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. [2022-07-19 21:26:29,385 INFO L132 encePairwiseOnDemand]: 337/353 looper letters, 50 selfloop transitions, 17 changer transitions 0/435 dead transitions. [2022-07-19 21:26:29,385 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 435 transitions, 1692 flow [2022-07-19 21:26:29,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:26:29,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:26:29,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2551 transitions. [2022-07-19 21:26:29,390 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9033286118980169 [2022-07-19 21:26:29,390 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2551 transitions. [2022-07-19 21:26:29,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2551 transitions. [2022-07-19 21:26:29,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:26:29,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2551 transitions. [2022-07-19 21:26:29,394 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) [2022-07-19 21:26:29,397 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) [2022-07-19 21:26:29,398 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) [2022-07-19 21:26:29,398 INFO L186 Difference]: Start difference. First operand has 403 places, 410 transitions, 1461 flow. Second operand 8 states and 2551 transitions. [2022-07-19 21:26:29,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 435 transitions, 1692 flow [2022-07-19 21:26:29,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 435 transitions, 1690 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-19 21:26:29,413 INFO L242 Difference]: Finished difference. Result has 414 places, 419 transitions, 1582 flow [2022-07-19 21:26:29,413 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} [2022-07-19 21:26:29,413 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 100 predicate places. [2022-07-19 21:26:29,413 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 419 transitions, 1582 flow [2022-07-19 21:26:29,414 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) [2022-07-19 21:26:29,414 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:26:29,414 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] [2022-07-19 21:26:29,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 21:26:29,415 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:26:29,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:26:29,415 INFO L85 PathProgramCache]: Analyzing trace with hash -2031545637, now seen corresponding path program 1 times [2022-07-19 21:26:29,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:26:29,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447427305] [2022-07-19 21:26:29,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:26:29,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:26:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:26:29,450 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 21:26:29,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:26:29,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447427305] [2022-07-19 21:26:29,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447427305] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:26:29,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:26:29,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:26:29,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754083326] [2022-07-19 21:26:29,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:26:29,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:26:29,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:26:29,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:26:29,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:26:29,453 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 353 [2022-07-19 21:26:29,455 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) [2022-07-19 21:26:29,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:26:29,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 353 [2022-07-19 21:26:29,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:26:30,493 INFO L129 PetriNetUnfolder]: 742/6727 cut-off events. [2022-07-19 21:26:30,493 INFO L130 PetriNetUnfolder]: For 2958/2985 co-relation queries the response was YES. [2022-07-19 21:26:30,558 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. [2022-07-19 21:26:30,574 INFO L132 encePairwiseOnDemand]: 343/353 looper letters, 46 selfloop transitions, 19 changer transitions 0/436 dead transitions. [2022-07-19 21:26:30,574 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 436 transitions, 1768 flow [2022-07-19 21:26:30,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:26:30,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:26:30,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2238 transitions. [2022-07-19 21:26:30,579 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.905706191825172 [2022-07-19 21:26:30,579 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2238 transitions. [2022-07-19 21:26:30,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2238 transitions. [2022-07-19 21:26:30,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:26:30,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2238 transitions. [2022-07-19 21:26:30,583 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) [2022-07-19 21:26:30,586 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) [2022-07-19 21:26:30,586 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) [2022-07-19 21:26:30,586 INFO L186 Difference]: Start difference. First operand has 414 places, 419 transitions, 1582 flow. Second operand 7 states and 2238 transitions. [2022-07-19 21:26:30,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 436 transitions, 1768 flow [2022-07-19 21:26:30,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 436 transitions, 1749 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-07-19 21:26:30,607 INFO L242 Difference]: Finished difference. Result has 420 places, 425 transitions, 1659 flow [2022-07-19 21:26:30,608 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} [2022-07-19 21:26:30,608 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 106 predicate places. [2022-07-19 21:26:30,608 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 425 transitions, 1659 flow [2022-07-19 21:26:30,609 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) [2022-07-19 21:26:30,609 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:26:30,609 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] [2022-07-19 21:26:30,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 21:26:30,610 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:26:30,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:26:30,610 INFO L85 PathProgramCache]: Analyzing trace with hash -353053735, now seen corresponding path program 1 times [2022-07-19 21:26:30,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:26:30,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372933891] [2022-07-19 21:26:30,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:26:30,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:26:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:26:30,664 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 21:26:30,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:26:30,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372933891] [2022-07-19 21:26:30,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372933891] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:26:30,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:26:30,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:26:30,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766542379] [2022-07-19 21:26:30,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:26:30,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:26:30,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:26:30,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:26:30,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:26:30,668 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 353 [2022-07-19 21:26:30,669 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) [2022-07-19 21:26:30,669 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:26:30,669 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 353 [2022-07-19 21:26:30,670 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:26:32,170 INFO L129 PetriNetUnfolder]: 918/8177 cut-off events. [2022-07-19 21:26:32,171 INFO L130 PetriNetUnfolder]: For 3841/3874 co-relation queries the response was YES. [2022-07-19 21:26:32,236 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. [2022-07-19 21:26:32,256 INFO L132 encePairwiseOnDemand]: 337/353 looper letters, 39 selfloop transitions, 17 changer transitions 0/450 dead transitions. [2022-07-19 21:26:32,256 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 450 transitions, 1838 flow [2022-07-19 21:26:32,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:26:32,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:26:32,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2550 transitions. [2022-07-19 21:26:32,259 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9029745042492918 [2022-07-19 21:26:32,259 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2550 transitions. [2022-07-19 21:26:32,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2550 transitions. [2022-07-19 21:26:32,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:26:32,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2550 transitions. [2022-07-19 21:26:32,263 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) [2022-07-19 21:26:32,267 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) [2022-07-19 21:26:32,267 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) [2022-07-19 21:26:32,267 INFO L186 Difference]: Start difference. First operand has 420 places, 425 transitions, 1659 flow. Second operand 8 states and 2550 transitions. [2022-07-19 21:26:32,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 450 transitions, 1838 flow [2022-07-19 21:26:32,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 450 transitions, 1814 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-07-19 21:26:32,305 INFO L242 Difference]: Finished difference. Result has 429 places, 435 transitions, 1744 flow [2022-07-19 21:26:32,306 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} [2022-07-19 21:26:32,306 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 115 predicate places. [2022-07-19 21:26:32,306 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 435 transitions, 1744 flow [2022-07-19 21:26:32,307 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) [2022-07-19 21:26:32,307 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:26:32,307 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] [2022-07-19 21:26:32,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 21:26:32,308 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:26:32,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:26:32,308 INFO L85 PathProgramCache]: Analyzing trace with hash -845106151, now seen corresponding path program 1 times [2022-07-19 21:26:32,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:26:32,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148757123] [2022-07-19 21:26:32,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:26:32,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:26:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:26:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 21:26:32,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:26:32,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148757123] [2022-07-19 21:26:32,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148757123] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:26:32,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:26:32,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:26:32,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025117012] [2022-07-19 21:26:32,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:26:32,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:26:32,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:26:32,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:26:32,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:26:32,342 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 353 [2022-07-19 21:26:32,343 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) [2022-07-19 21:26:32,343 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:26:32,343 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 353 [2022-07-19 21:26:32,343 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:26:36,408 INFO L129 PetriNetUnfolder]: 2636/22931 cut-off events. [2022-07-19 21:26:36,408 INFO L130 PetriNetUnfolder]: For 13048/13767 co-relation queries the response was YES. [2022-07-19 21:26:36,597 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. [2022-07-19 21:26:36,641 INFO L132 encePairwiseOnDemand]: 349/353 looper letters, 51 selfloop transitions, 3 changer transitions 0/452 dead transitions. [2022-07-19 21:26:36,641 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 452 transitions, 1912 flow [2022-07-19 21:26:36,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:26:36,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:26:36,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 969 transitions. [2022-07-19 21:26:36,642 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9150141643059491 [2022-07-19 21:26:36,643 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 969 transitions. [2022-07-19 21:26:36,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 969 transitions. [2022-07-19 21:26:36,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:26:36,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 969 transitions. [2022-07-19 21:26:36,644 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) [2022-07-19 21:26:36,646 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) [2022-07-19 21:26:36,647 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) [2022-07-19 21:26:36,647 INFO L186 Difference]: Start difference. First operand has 429 places, 435 transitions, 1744 flow. Second operand 3 states and 969 transitions. [2022-07-19 21:26:36,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 452 transitions, 1912 flow [2022-07-19 21:26:36,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 452 transitions, 1899 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-07-19 21:26:36,791 INFO L242 Difference]: Finished difference. Result has 430 places, 437 transitions, 1753 flow [2022-07-19 21:26:36,792 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} [2022-07-19 21:26:36,792 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 116 predicate places. [2022-07-19 21:26:36,793 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 437 transitions, 1753 flow [2022-07-19 21:26:36,793 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) [2022-07-19 21:26:36,793 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:26:36,793 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] [2022-07-19 21:26:36,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 21:26:36,794 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:26:36,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:26:36,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1195815087, now seen corresponding path program 1 times [2022-07-19 21:26:36,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:26:36,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832714785] [2022-07-19 21:26:36,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:26:36,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:26:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:26:36,959 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 21:26:36,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:26:36,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832714785] [2022-07-19 21:26:36,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832714785] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:26:36,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:26:36,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:26:36,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599407775] [2022-07-19 21:26:36,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:26:36,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:26:36,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:26:36,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:26:36,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:26:36,962 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 353 [2022-07-19 21:26:36,964 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) [2022-07-19 21:26:36,964 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:26:36,964 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 353 [2022-07-19 21:26:36,964 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:26:40,127 INFO L129 PetriNetUnfolder]: 1584/15283 cut-off events. [2022-07-19 21:26:40,128 INFO L130 PetriNetUnfolder]: For 7548/7612 co-relation queries the response was YES. [2022-07-19 21:26:40,279 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. [2022-07-19 21:26:40,309 INFO L132 encePairwiseOnDemand]: 341/353 looper letters, 48 selfloop transitions, 13 changer transitions 0/460 dead transitions. [2022-07-19 21:26:40,309 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 460 transitions, 1961 flow [2022-07-19 21:26:40,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:26:40,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:26:40,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2247 transitions. [2022-07-19 21:26:40,311 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9093484419263456 [2022-07-19 21:26:40,312 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2247 transitions. [2022-07-19 21:26:40,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2247 transitions. [2022-07-19 21:26:40,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:26:40,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2247 transitions. [2022-07-19 21:26:40,315 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) [2022-07-19 21:26:40,317 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) [2022-07-19 21:26:40,318 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) [2022-07-19 21:26:40,318 INFO L186 Difference]: Start difference. First operand has 430 places, 437 transitions, 1753 flow. Second operand 7 states and 2247 transitions. [2022-07-19 21:26:40,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 460 transitions, 1961 flow [2022-07-19 21:26:40,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 460 transitions, 1955 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:26:40,375 INFO L242 Difference]: Finished difference. Result has 439 places, 447 transitions, 1860 flow [2022-07-19 21:26:40,376 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} [2022-07-19 21:26:40,376 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 125 predicate places. [2022-07-19 21:26:40,376 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 447 transitions, 1860 flow [2022-07-19 21:26:40,377 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) [2022-07-19 21:26:40,377 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:26:40,377 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] [2022-07-19 21:26:40,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-19 21:26:40,377 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:26:40,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:26:40,378 INFO L85 PathProgramCache]: Analyzing trace with hash 315906300, now seen corresponding path program 1 times [2022-07-19 21:26:40,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:26:40,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298472003] [2022-07-19 21:26:40,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:26:40,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:26:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:26:40,433 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 21:26:40,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:26:40,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298472003] [2022-07-19 21:26:40,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298472003] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:26:40,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:26:40,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:26:40,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295665591] [2022-07-19 21:26:40,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:26:40,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:26:40,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:26:40,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:26:40,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:26:40,436 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 353 [2022-07-19 21:26:40,437 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) [2022-07-19 21:26:40,437 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:26:40,437 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 353 [2022-07-19 21:26:40,437 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:26:50,914 INFO L129 PetriNetUnfolder]: 9963/57728 cut-off events. [2022-07-19 21:26:50,914 INFO L130 PetriNetUnfolder]: For 51109/51720 co-relation queries the response was YES. [2022-07-19 21:26:51,943 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. [2022-07-19 21:26:52,085 INFO L132 encePairwiseOnDemand]: 332/353 looper letters, 286 selfloop transitions, 86 changer transitions 20/717 dead transitions. [2022-07-19 21:26:52,085 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 717 transitions, 3922 flow [2022-07-19 21:26:52,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 21:26:52,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-19 21:26:52,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 5607 transitions. [2022-07-19 21:26:52,099 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8359922469062174 [2022-07-19 21:26:52,099 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 5607 transitions. [2022-07-19 21:26:52,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 5607 transitions. [2022-07-19 21:26:52,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:26:52,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 5607 transitions. [2022-07-19 21:26:52,108 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) [2022-07-19 21:26:52,115 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) [2022-07-19 21:26:52,116 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) [2022-07-19 21:26:52,116 INFO L186 Difference]: Start difference. First operand has 439 places, 447 transitions, 1860 flow. Second operand 19 states and 5607 transitions. [2022-07-19 21:26:52,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 717 transitions, 3922 flow [2022-07-19 21:26:52,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 717 transitions, 3868 flow, removed 18 selfloop flow, removed 6 redundant places. [2022-07-19 21:26:52,764 INFO L242 Difference]: Finished difference. Result has 455 places, 487 transitions, 2271 flow [2022-07-19 21:26:52,764 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} [2022-07-19 21:26:52,764 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 141 predicate places. [2022-07-19 21:26:52,764 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 487 transitions, 2271 flow [2022-07-19 21:26:52,765 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) [2022-07-19 21:26:52,765 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:26:52,765 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] [2022-07-19 21:26:52,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-19 21:26:52,765 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:26:52,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:26:52,766 INFO L85 PathProgramCache]: Analyzing trace with hash 899792024, now seen corresponding path program 1 times [2022-07-19 21:26:52,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:26:52,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308640124] [2022-07-19 21:26:52,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:26:52,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:26:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:26:52,830 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 21:26:52,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:26:52,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308640124] [2022-07-19 21:26:52,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308640124] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:26:52,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:26:52,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:26:52,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845448683] [2022-07-19 21:26:52,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:26:52,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:26:52,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:26:52,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:26:52,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:26:52,834 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 353 [2022-07-19 21:26:52,835 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) [2022-07-19 21:26:52,835 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:26:52,835 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 353 [2022-07-19 21:26:52,835 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:01,484 INFO L129 PetriNetUnfolder]: 9659/46053 cut-off events. [2022-07-19 21:27:01,484 INFO L130 PetriNetUnfolder]: For 41549/42545 co-relation queries the response was YES. [2022-07-19 21:27:02,477 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. [2022-07-19 21:27:02,588 INFO L132 encePairwiseOnDemand]: 331/353 looper letters, 205 selfloop transitions, 43 changer transitions 120/672 dead transitions. [2022-07-19 21:27:02,588 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 672 transitions, 3663 flow [2022-07-19 21:27:02,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 21:27:02,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-19 21:27:02,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 5723 transitions. [2022-07-19 21:27:02,594 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8106232294617564 [2022-07-19 21:27:02,595 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 5723 transitions. [2022-07-19 21:27:02,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 5723 transitions. [2022-07-19 21:27:02,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:02,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 5723 transitions. [2022-07-19 21:27:02,603 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) [2022-07-19 21:27:02,609 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) [2022-07-19 21:27:02,610 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) [2022-07-19 21:27:02,610 INFO L186 Difference]: Start difference. First operand has 455 places, 487 transitions, 2271 flow. Second operand 20 states and 5723 transitions. [2022-07-19 21:27:02,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 672 transitions, 3663 flow [2022-07-19 21:27:02,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 672 transitions, 3420 flow, removed 42 selfloop flow, removed 14 redundant places. [2022-07-19 21:27:02,967 INFO L242 Difference]: Finished difference. Result has 464 places, 417 transitions, 1603 flow [2022-07-19 21:27:02,967 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} [2022-07-19 21:27:02,968 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 150 predicate places. [2022-07-19 21:27:02,968 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 417 transitions, 1603 flow [2022-07-19 21:27:02,968 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) [2022-07-19 21:27:02,968 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:02,969 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] [2022-07-19 21:27:02,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-19 21:27:02,969 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:02,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:02,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1678379906, now seen corresponding path program 1 times [2022-07-19 21:27:02,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:02,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749151482] [2022-07-19 21:27:02,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:02,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:02,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 21:27:03,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:03,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749151482] [2022-07-19 21:27:03,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749151482] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:03,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:03,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-19 21:27:03,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610014488] [2022-07-19 21:27:03,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:03,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 21:27:03,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:03,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 21:27:03,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-07-19 21:27:03,132 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 353 [2022-07-19 21:27:03,134 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) [2022-07-19 21:27:03,134 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:03,134 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 353 [2022-07-19 21:27:03,134 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand