./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 791161d1 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-?-791161d [2022-07-22 21:41:10,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:41:10,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:41:10,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:41:10,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:41:10,730 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:41:10,731 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:41:10,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:41:10,734 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:41:10,734 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:41:10,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:41:10,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:41:10,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:41:10,737 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:41:10,737 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:41:10,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:41:10,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:41:10,739 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:41:10,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:41:10,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:41:10,742 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:41:10,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:41:10,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:41:10,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:41:10,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:41:10,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:41:10,747 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:41:10,747 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:41:10,748 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:41:10,748 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:41:10,749 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:41:10,749 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:41:10,750 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:41:10,750 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:41:10,751 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:41:10,751 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:41:10,752 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:41:10,752 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:41:10,752 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:41:10,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:41:10,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:41:10,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:41:10,755 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:41:10,768 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:41:10,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:41:10,769 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:41:10,769 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:41:10,770 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:41:10,770 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:41:10,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:41:10,771 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:41:10,771 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:41:10,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:41:10,771 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:41:10,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:41:10,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:41:10,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:41:10,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:41:10,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:41:10,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:41:10,773 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:41:10,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:41:10,773 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:41:10,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:41:10,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:41:10,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:41:10,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:41:10,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:41:10,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:41:10,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:41:10,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:41:10,775 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:41:10,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:41:10,775 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:41:10,775 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:41:10,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:41:10,776 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 [2022-07-22 21:41:10,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:41:10,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:41:10,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:41:10,985 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:41:10,986 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:41:10,987 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2022-07-22 21:41:11,044 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8e373892/a103c9dde8514583bc5e64594e1b3ddc/FLAG41f30def0 [2022-07-22 21:41:11,369 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:41:11,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2022-07-22 21:41:11,377 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8e373892/a103c9dde8514583bc5e64594e1b3ddc/FLAG41f30def0 [2022-07-22 21:41:11,775 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8e373892/a103c9dde8514583bc5e64594e1b3ddc [2022-07-22 21:41:11,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:41:11,778 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:41:11,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:41:11,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:41:11,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:41:11,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:41:11" (1/1) ... [2022-07-22 21:41:11,785 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c9e5e50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:11, skipping insertion in model container [2022-07-22 21:41:11,786 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:41:11" (1/1) ... [2022-07-22 21:41:11,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:41:11,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:41:11,961 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] [2022-07-22 21:41:11,971 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:41:11,977 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:41:12,000 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] [2022-07-22 21:41:12,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:41:12,013 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:41:12,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:12 WrapperNode [2022-07-22 21:41:12,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:41:12,014 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:41:12,014 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:41:12,014 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:41:12,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:12" (1/1) ... [2022-07-22 21:41:12,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:12" (1/1) ... [2022-07-22 21:41:12,057 INFO L137 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 278 [2022-07-22 21:41:12,058 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:41:12,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:41:12,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:41:12,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:41:12,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:12" (1/1) ... [2022-07-22 21:41:12,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:12" (1/1) ... [2022-07-22 21:41:12,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:12" (1/1) ... [2022-07-22 21:41:12,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:12" (1/1) ... [2022-07-22 21:41:12,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:12" (1/1) ... [2022-07-22 21:41:12,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:12" (1/1) ... [2022-07-22 21:41:12,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:12" (1/1) ... [2022-07-22 21:41:12,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:41:12,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:41:12,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:41:12,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:41:12,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:12" (1/1) ... [2022-07-22 21:41:12,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:41:12,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:41:12,120 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) [2022-07-22 21:41:12,128 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 [2022-07-22 21:41:12,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:41:12,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:41:12,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:41:12,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:41:12,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:41:12,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:41:12,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:41:12,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:41:12,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:41:12,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:41:12,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:41:12,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:41:12,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:41:12,152 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:41:12,216 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:41:12,218 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:41:12,505 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:41:12,514 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:41:12,515 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 21:41:12,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:41:12 BoogieIcfgContainer [2022-07-22 21:41:12,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:41:12,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:41:12,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:41:12,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:41:12,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:41:11" (1/3) ... [2022-07-22 21:41:12,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@796de433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:41:12, skipping insertion in model container [2022-07-22 21:41:12,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:12" (2/3) ... [2022-07-22 21:41:12,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@796de433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:41:12, skipping insertion in model container [2022-07-22 21:41:12,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:41:12" (3/3) ... [2022-07-22 21:41:12,523 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2022-07-22 21:41:12,526 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:41:12,533 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:41:12,533 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:41:12,533 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:41:12,619 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:41:12,654 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 325 places, 353 transitions, 722 flow [2022-07-22 21:41:12,768 INFO L129 PetriNetUnfolder]: 35/351 cut-off events. [2022-07-22 21:41:12,769 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:41:12,776 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. [2022-07-22 21:41:12,777 INFO L82 GeneralOperation]: Start removeDead. Operand has 325 places, 353 transitions, 722 flow [2022-07-22 21:41:12,785 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 314 places, 342 transitions, 696 flow [2022-07-22 21:41:12,800 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:41:12,806 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@5f51e98, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2ad9acce [2022-07-22 21:41:12,806 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:41:12,863 INFO L129 PetriNetUnfolder]: 35/341 cut-off events. [2022-07-22 21:41:12,863 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:41:12,864 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:12,864 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] [2022-07-22 21:41:12,865 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:41:12,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:12,870 INFO L85 PathProgramCache]: Analyzing trace with hash 400884361, now seen corresponding path program 1 times [2022-07-22 21:41:12,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:12,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712889719] [2022-07-22 21:41:12,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:12,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:41:13,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:13,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712889719] [2022-07-22 21:41:13,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712889719] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:13,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:13,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:41:13,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404387373] [2022-07-22 21:41:13,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:13,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:41:13,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:13,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:41:13,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:41:13,153 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 353 [2022-07-22 21:41:13,159 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) [2022-07-22 21:41:13,159 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:13,159 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 353 [2022-07-22 21:41:13,160 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:13,236 INFO L129 PetriNetUnfolder]: 21/328 cut-off events. [2022-07-22 21:41:13,236 INFO L130 PetriNetUnfolder]: For 8/9 co-relation queries the response was YES. [2022-07-22 21:41:13,239 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. [2022-07-22 21:41:13,241 INFO L132 encePairwiseOnDemand]: 339/353 looper letters, 4 selfloop transitions, 0 changer transitions 3/328 dead transitions. [2022-07-22 21:41:13,242 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 328 transitions, 676 flow [2022-07-22 21:41:13,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:41:13,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:41:13,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 686 transitions. [2022-07-22 21:41:13,265 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9716713881019831 [2022-07-22 21:41:13,269 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 686 transitions. [2022-07-22 21:41:13,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 686 transitions. [2022-07-22 21:41:13,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:13,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 686 transitions. [2022-07-22 21:41:13,280 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) [2022-07-22 21:41:13,288 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) [2022-07-22 21:41:13,289 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) [2022-07-22 21:41:13,290 INFO L186 Difference]: Start difference. First operand has 314 places, 342 transitions, 696 flow. Second operand 2 states and 686 transitions. [2022-07-22 21:41:13,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 328 transitions, 676 flow [2022-07-22 21:41:13,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 328 transitions, 668 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:41:13,303 INFO L242 Difference]: Finished difference. Result has 311 places, 325 transitions, 654 flow [2022-07-22 21:41:13,305 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} [2022-07-22 21:41:13,310 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, -3 predicate places. [2022-07-22 21:41:13,310 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 325 transitions, 654 flow [2022-07-22 21:41:13,311 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) [2022-07-22 21:41:13,311 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:13,312 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] [2022-07-22 21:41:13,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:41:13,312 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:41:13,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:13,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1831147785, now seen corresponding path program 1 times [2022-07-22 21:41:13,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:13,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12711167] [2022-07-22 21:41:13,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:13,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:41:13,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:13,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12711167] [2022-07-22 21:41:13,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12711167] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:13,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:13,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:41:13,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014486766] [2022-07-22 21:41:13,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:13,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:41:13,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:13,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:41:13,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:41:13,479 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 353 [2022-07-22 21:41:13,480 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) [2022-07-22 21:41:13,481 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:13,481 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 353 [2022-07-22 21:41:13,481 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:13,640 INFO L129 PetriNetUnfolder]: 61/565 cut-off events. [2022-07-22 21:41:13,641 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-22 21:41:13,643 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. [2022-07-22 21:41:13,645 INFO L132 encePairwiseOnDemand]: 341/353 looper letters, 27 selfloop transitions, 11 changer transitions 0/340 dead transitions. [2022-07-22 21:41:13,645 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 340 transitions, 764 flow [2022-07-22 21:41:13,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:41:13,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:41:13,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1299 transitions. [2022-07-22 21:41:13,650 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.919971671388102 [2022-07-22 21:41:13,650 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1299 transitions. [2022-07-22 21:41:13,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1299 transitions. [2022-07-22 21:41:13,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:13,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1299 transitions. [2022-07-22 21:41:13,653 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) [2022-07-22 21:41:13,657 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) [2022-07-22 21:41:13,658 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) [2022-07-22 21:41:13,658 INFO L186 Difference]: Start difference. First operand has 311 places, 325 transitions, 654 flow. Second operand 4 states and 1299 transitions. [2022-07-22 21:41:13,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 340 transitions, 764 flow [2022-07-22 21:41:13,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 340 transitions, 764 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:41:13,666 INFO L242 Difference]: Finished difference. Result has 314 places, 331 transitions, 724 flow [2022-07-22 21:41:13,666 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} [2022-07-22 21:41:13,667 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 0 predicate places. [2022-07-22 21:41:13,667 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 331 transitions, 724 flow [2022-07-22 21:41:13,668 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) [2022-07-22 21:41:13,668 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:13,668 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] [2022-07-22 21:41:13,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:41:13,669 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:41:13,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:13,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1892940965, now seen corresponding path program 1 times [2022-07-22 21:41:13,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:13,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570073253] [2022-07-22 21:41:13,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:13,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:41:13,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:13,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570073253] [2022-07-22 21:41:13,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570073253] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:13,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:13,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:41:13,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696039682] [2022-07-22 21:41:13,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:13,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:41:13,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:13,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:41:13,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:41:13,766 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 353 [2022-07-22 21:41:13,767 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) [2022-07-22 21:41:13,767 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:13,767 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 353 [2022-07-22 21:41:13,767 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:14,342 INFO L129 PetriNetUnfolder]: 848/4653 cut-off events. [2022-07-22 21:41:14,342 INFO L130 PetriNetUnfolder]: For 362/374 co-relation queries the response was YES. [2022-07-22 21:41:14,355 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. [2022-07-22 21:41:14,370 INFO L132 encePairwiseOnDemand]: 345/353 looper letters, 57 selfloop transitions, 4 changer transitions 0/357 dead transitions. [2022-07-22 21:41:14,370 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 357 transitions, 911 flow [2022-07-22 21:41:14,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:41:14,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:41:14,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 975 transitions. [2022-07-22 21:41:14,373 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9206798866855525 [2022-07-22 21:41:14,374 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 975 transitions. [2022-07-22 21:41:14,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 975 transitions. [2022-07-22 21:41:14,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:14,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 975 transitions. [2022-07-22 21:41:14,377 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) [2022-07-22 21:41:14,379 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) [2022-07-22 21:41:14,379 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) [2022-07-22 21:41:14,380 INFO L186 Difference]: Start difference. First operand has 314 places, 331 transitions, 724 flow. Second operand 3 states and 975 transitions. [2022-07-22 21:41:14,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 357 transitions, 911 flow [2022-07-22 21:41:14,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 357 transitions, 911 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:41:14,389 INFO L242 Difference]: Finished difference. Result has 318 places, 335 transitions, 764 flow [2022-07-22 21:41:14,389 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} [2022-07-22 21:41:14,391 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 4 predicate places. [2022-07-22 21:41:14,391 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 335 transitions, 764 flow [2022-07-22 21:41:14,392 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) [2022-07-22 21:41:14,392 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:14,392 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] [2022-07-22 21:41:14,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:41:14,393 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:41:14,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:14,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1952454215, now seen corresponding path program 1 times [2022-07-22 21:41:14,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:14,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770891630] [2022-07-22 21:41:14,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:14,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:14,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:41:14,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:14,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770891630] [2022-07-22 21:41:14,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770891630] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:14,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:14,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:41:14,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137898977] [2022-07-22 21:41:14,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:14,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:41:14,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:14,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:41:14,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:41:14,458 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 353 [2022-07-22 21:41:14,459 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) [2022-07-22 21:41:14,459 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:14,459 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 353 [2022-07-22 21:41:14,459 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:14,941 INFO L129 PetriNetUnfolder]: 648/4102 cut-off events. [2022-07-22 21:41:14,942 INFO L130 PetriNetUnfolder]: For 527/541 co-relation queries the response was YES. [2022-07-22 21:41:14,951 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. [2022-07-22 21:41:14,961 INFO L132 encePairwiseOnDemand]: 347/353 looper letters, 59 selfloop transitions, 2 changer transitions 0/357 dead transitions. [2022-07-22 21:41:14,961 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 357 transitions, 939 flow [2022-07-22 21:41:14,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:41:14,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:41:14,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 973 transitions. [2022-07-22 21:41:14,964 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9187913125590179 [2022-07-22 21:41:14,964 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 973 transitions. [2022-07-22 21:41:14,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 973 transitions. [2022-07-22 21:41:14,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:14,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 973 transitions. [2022-07-22 21:41:14,967 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) [2022-07-22 21:41:14,971 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) [2022-07-22 21:41:14,972 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) [2022-07-22 21:41:14,972 INFO L186 Difference]: Start difference. First operand has 318 places, 335 transitions, 764 flow. Second operand 3 states and 973 transitions. [2022-07-22 21:41:14,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 357 transitions, 939 flow [2022-07-22 21:41:14,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 357 transitions, 937 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:41:14,978 INFO L242 Difference]: Finished difference. Result has 321 places, 335 transitions, 774 flow [2022-07-22 21:41:14,979 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} [2022-07-22 21:41:14,980 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 7 predicate places. [2022-07-22 21:41:14,980 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 335 transitions, 774 flow [2022-07-22 21:41:14,982 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) [2022-07-22 21:41:14,982 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:14,982 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] [2022-07-22 21:41:14,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:41:14,982 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:41:14,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:14,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1351251233, now seen corresponding path program 1 times [2022-07-22 21:41:14,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:14,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710445146] [2022-07-22 21:41:14,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:14,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:41:15,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:15,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710445146] [2022-07-22 21:41:15,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710445146] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:15,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:15,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:41:15,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32531874] [2022-07-22 21:41:15,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:15,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:41:15,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:15,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:41:15,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:41:15,065 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 353 [2022-07-22 21:41:15,067 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) [2022-07-22 21:41:15,067 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:15,067 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 353 [2022-07-22 21:41:15,067 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:15,280 INFO L129 PetriNetUnfolder]: 132/1424 cut-off events. [2022-07-22 21:41:15,281 INFO L130 PetriNetUnfolder]: For 49/62 co-relation queries the response was YES. [2022-07-22 21:41:15,286 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. [2022-07-22 21:41:15,290 INFO L132 encePairwiseOnDemand]: 342/353 looper letters, 30 selfloop transitions, 9 changer transitions 0/352 dead transitions. [2022-07-22 21:41:15,290 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 352 transitions, 892 flow [2022-07-22 21:41:15,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:41:15,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:41:15,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1937 transitions. [2022-07-22 21:41:15,294 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9145420207743153 [2022-07-22 21:41:15,294 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1937 transitions. [2022-07-22 21:41:15,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1937 transitions. [2022-07-22 21:41:15,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:15,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1937 transitions. [2022-07-22 21:41:15,298 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) [2022-07-22 21:41:15,301 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) [2022-07-22 21:41:15,303 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) [2022-07-22 21:41:15,303 INFO L186 Difference]: Start difference. First operand has 321 places, 335 transitions, 774 flow. Second operand 6 states and 1937 transitions. [2022-07-22 21:41:15,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 352 transitions, 892 flow [2022-07-22 21:41:15,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 352 transitions, 890 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:41:15,311 INFO L242 Difference]: Finished difference. Result has 329 places, 341 transitions, 831 flow [2022-07-22 21:41:15,312 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} [2022-07-22 21:41:15,313 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 15 predicate places. [2022-07-22 21:41:15,314 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 341 transitions, 831 flow [2022-07-22 21:41:15,314 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) [2022-07-22 21:41:15,315 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:15,315 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] [2022-07-22 21:41:15,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:41:15,315 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:41:15,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:15,316 INFO L85 PathProgramCache]: Analyzing trace with hash -544975579, now seen corresponding path program 1 times [2022-07-22 21:41:15,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:15,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651582243] [2022-07-22 21:41:15,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:15,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:15,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:41:15,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:15,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651582243] [2022-07-22 21:41:15,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651582243] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:15,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:15,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:41:15,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687004092] [2022-07-22 21:41:15,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:15,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:41:15,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:15,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:41:15,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:41:15,387 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 353 [2022-07-22 21:41:15,389 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) [2022-07-22 21:41:15,389 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:15,389 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 353 [2022-07-22 21:41:15,390 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:15,702 INFO L129 PetriNetUnfolder]: 211/2381 cut-off events. [2022-07-22 21:41:15,703 INFO L130 PetriNetUnfolder]: For 132/143 co-relation queries the response was YES. [2022-07-22 21:41:15,715 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. [2022-07-22 21:41:15,723 INFO L132 encePairwiseOnDemand]: 342/353 looper letters, 29 selfloop transitions, 9 changer transitions 0/357 dead transitions. [2022-07-22 21:41:15,723 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 357 transitions, 944 flow [2022-07-22 21:41:15,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:41:15,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:41:15,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1936 transitions. [2022-07-22 21:41:15,727 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9140698772426817 [2022-07-22 21:41:15,727 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1936 transitions. [2022-07-22 21:41:15,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1936 transitions. [2022-07-22 21:41:15,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:15,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1936 transitions. [2022-07-22 21:41:15,732 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) [2022-07-22 21:41:15,735 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) [2022-07-22 21:41:15,736 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) [2022-07-22 21:41:15,736 INFO L186 Difference]: Start difference. First operand has 329 places, 341 transitions, 831 flow. Second operand 6 states and 1936 transitions. [2022-07-22 21:41:15,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 357 transitions, 944 flow [2022-07-22 21:41:15,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 357 transitions, 939 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:41:15,742 INFO L242 Difference]: Finished difference. Result has 337 places, 347 transitions, 885 flow [2022-07-22 21:41:15,743 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} [2022-07-22 21:41:15,744 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 23 predicate places. [2022-07-22 21:41:15,745 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 347 transitions, 885 flow [2022-07-22 21:41:15,745 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) [2022-07-22 21:41:15,745 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:15,745 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] [2022-07-22 21:41:15,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:41:15,746 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:41:15,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:15,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1786217094, now seen corresponding path program 1 times [2022-07-22 21:41:15,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:15,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640681065] [2022-07-22 21:41:15,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:15,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:15,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:41:15,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:15,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640681065] [2022-07-22 21:41:15,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640681065] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:15,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:15,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:41:15,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044926822] [2022-07-22 21:41:15,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:15,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:41:15,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:15,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:41:15,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:41:15,801 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 353 [2022-07-22 21:41:15,802 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) [2022-07-22 21:41:15,803 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:15,803 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 353 [2022-07-22 21:41:15,803 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:15,993 INFO L129 PetriNetUnfolder]: 110/1717 cut-off events. [2022-07-22 21:41:15,993 INFO L130 PetriNetUnfolder]: For 75/87 co-relation queries the response was YES. [2022-07-22 21:41:16,003 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. [2022-07-22 21:41:16,007 INFO L132 encePairwiseOnDemand]: 348/353 looper letters, 16 selfloop transitions, 4 changer transitions 0/351 dead transitions. [2022-07-22 21:41:16,007 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 351 transitions, 933 flow [2022-07-22 21:41:16,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:41:16,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:41:16,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1631 transitions. [2022-07-22 21:41:16,010 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9240793201133144 [2022-07-22 21:41:16,011 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1631 transitions. [2022-07-22 21:41:16,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1631 transitions. [2022-07-22 21:41:16,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:16,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1631 transitions. [2022-07-22 21:41:16,014 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) [2022-07-22 21:41:16,016 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) [2022-07-22 21:41:16,017 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) [2022-07-22 21:41:16,017 INFO L186 Difference]: Start difference. First operand has 337 places, 347 transitions, 885 flow. Second operand 5 states and 1631 transitions. [2022-07-22 21:41:16,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 351 transitions, 933 flow [2022-07-22 21:41:16,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 351 transitions, 928 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:41:16,023 INFO L242 Difference]: Finished difference. Result has 341 places, 348 transitions, 896 flow [2022-07-22 21:41:16,023 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} [2022-07-22 21:41:16,024 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 27 predicate places. [2022-07-22 21:41:16,024 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 348 transitions, 896 flow [2022-07-22 21:41:16,025 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) [2022-07-22 21:41:16,025 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:16,025 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] [2022-07-22 21:41:16,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:41:16,025 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:41:16,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:16,026 INFO L85 PathProgramCache]: Analyzing trace with hash 20910411, now seen corresponding path program 1 times [2022-07-22 21:41:16,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:16,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109812536] [2022-07-22 21:41:16,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:16,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:16,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:41:16,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:16,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109812536] [2022-07-22 21:41:16,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109812536] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:41:16,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122226182] [2022-07-22 21:41:16,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:16,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:41:16,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:41:16,084 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) [2022-07-22 21:41:16,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:41:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:16,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:41:16,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:41:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:41:16,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:41:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:41:16,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122226182] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:41:16,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:41:16,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-07-22 21:41:16,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798596040] [2022-07-22 21:41:16,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:41:16,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:41:16,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:16,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:41:16,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:41:16,348 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 353 [2022-07-22 21:41:16,351 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) [2022-07-22 21:41:16,351 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:16,351 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 353 [2022-07-22 21:41:16,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:16,634 INFO L129 PetriNetUnfolder]: 110/1726 cut-off events. [2022-07-22 21:41:16,634 INFO L130 PetriNetUnfolder]: For 76/88 co-relation queries the response was YES. [2022-07-22 21:41:16,647 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. [2022-07-22 21:41:16,651 INFO L132 encePairwiseOnDemand]: 345/353 looper letters, 17 selfloop transitions, 11 changer transitions 0/358 dead transitions. [2022-07-22 21:41:16,651 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 358 transitions, 974 flow [2022-07-22 21:41:16,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:41:16,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:41:16,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3561 transitions. [2022-07-22 21:41:16,657 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9170744269894412 [2022-07-22 21:41:16,657 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3561 transitions. [2022-07-22 21:41:16,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3561 transitions. [2022-07-22 21:41:16,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:16,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3561 transitions. [2022-07-22 21:41:16,687 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) [2022-07-22 21:41:16,702 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) [2022-07-22 21:41:16,703 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) [2022-07-22 21:41:16,704 INFO L186 Difference]: Start difference. First operand has 341 places, 348 transitions, 896 flow. Second operand 11 states and 3561 transitions. [2022-07-22 21:41:16,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 358 transitions, 974 flow [2022-07-22 21:41:16,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 358 transitions, 968 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-22 21:41:16,710 INFO L242 Difference]: Finished difference. Result has 351 places, 354 transitions, 945 flow [2022-07-22 21:41:16,711 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} [2022-07-22 21:41:16,712 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 37 predicate places. [2022-07-22 21:41:16,713 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 354 transitions, 945 flow [2022-07-22 21:41:16,714 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) [2022-07-22 21:41:16,714 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:16,714 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] [2022-07-22 21:41:16,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:41:16,931 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 [2022-07-22 21:41:16,932 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:41:16,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:16,932 INFO L85 PathProgramCache]: Analyzing trace with hash -523708949, now seen corresponding path program 2 times [2022-07-22 21:41:16,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:16,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645518782] [2022-07-22 21:41:16,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:16,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 21:41:17,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:17,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645518782] [2022-07-22 21:41:17,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645518782] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:17,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:17,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:41:17,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161958995] [2022-07-22 21:41:17,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:17,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:41:17,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:17,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:41:17,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:41:17,011 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 353 [2022-07-22 21:41:17,012 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) [2022-07-22 21:41:17,012 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:17,013 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 353 [2022-07-22 21:41:17,013 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:17,276 INFO L129 PetriNetUnfolder]: 111/1830 cut-off events. [2022-07-22 21:41:17,277 INFO L130 PetriNetUnfolder]: For 78/90 co-relation queries the response was YES. [2022-07-22 21:41:17,289 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. [2022-07-22 21:41:17,294 INFO L132 encePairwiseOnDemand]: 344/353 looper letters, 35 selfloop transitions, 4 changer transitions 5/369 dead transitions. [2022-07-22 21:41:17,294 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 369 transitions, 1063 flow [2022-07-22 21:41:17,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:41:17,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:41:17,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2493 transitions. [2022-07-22 21:41:17,298 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8827903682719547 [2022-07-22 21:41:17,298 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2493 transitions. [2022-07-22 21:41:17,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2493 transitions. [2022-07-22 21:41:17,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:17,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2493 transitions. [2022-07-22 21:41:17,303 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) [2022-07-22 21:41:17,307 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) [2022-07-22 21:41:17,307 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) [2022-07-22 21:41:17,307 INFO L186 Difference]: Start difference. First operand has 351 places, 354 transitions, 945 flow. Second operand 8 states and 2493 transitions. [2022-07-22 21:41:17,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 369 transitions, 1063 flow [2022-07-22 21:41:17,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 369 transitions, 1054 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-22 21:41:17,315 INFO L242 Difference]: Finished difference. Result has 361 places, 357 transitions, 972 flow [2022-07-22 21:41:17,316 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} [2022-07-22 21:41:17,316 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 47 predicate places. [2022-07-22 21:41:17,317 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 357 transitions, 972 flow [2022-07-22 21:41:17,317 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) [2022-07-22 21:41:17,317 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:17,318 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] [2022-07-22 21:41:17,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 21:41:17,318 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:41:17,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:17,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1163854113, now seen corresponding path program 1 times [2022-07-22 21:41:17,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:17,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99249287] [2022-07-22 21:41:17,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:17,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:17,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:17,363 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 21:41:17,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:17,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99249287] [2022-07-22 21:41:17,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99249287] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:17,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:17,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:41:17,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065908090] [2022-07-22 21:41:17,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:17,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:41:17,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:17,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:41:17,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:41:17,367 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 353 [2022-07-22 21:41:17,368 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) [2022-07-22 21:41:17,368 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:17,368 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 353 [2022-07-22 21:41:17,368 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:17,812 INFO L129 PetriNetUnfolder]: 293/2938 cut-off events. [2022-07-22 21:41:17,813 INFO L130 PetriNetUnfolder]: For 213/224 co-relation queries the response was YES. [2022-07-22 21:41:17,830 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. [2022-07-22 21:41:17,836 INFO L132 encePairwiseOnDemand]: 341/353 looper letters, 26 selfloop transitions, 11 changer transitions 0/371 dead transitions. [2022-07-22 21:41:17,837 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 371 transitions, 1077 flow [2022-07-22 21:41:17,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:41:17,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:41:17,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1298 transitions. [2022-07-22 21:41:17,839 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9192634560906515 [2022-07-22 21:41:17,839 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1298 transitions. [2022-07-22 21:41:17,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1298 transitions. [2022-07-22 21:41:17,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:17,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1298 transitions. [2022-07-22 21:41:17,842 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) [2022-07-22 21:41:17,844 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) [2022-07-22 21:41:17,844 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) [2022-07-22 21:41:17,844 INFO L186 Difference]: Start difference. First operand has 361 places, 357 transitions, 972 flow. Second operand 4 states and 1298 transitions. [2022-07-22 21:41:17,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 371 transitions, 1077 flow [2022-07-22 21:41:17,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 371 transitions, 1067 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-07-22 21:41:17,852 INFO L242 Difference]: Finished difference. Result has 358 places, 363 transitions, 1032 flow [2022-07-22 21:41:17,853 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} [2022-07-22 21:41:17,853 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 44 predicate places. [2022-07-22 21:41:17,853 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 363 transitions, 1032 flow [2022-07-22 21:41:17,854 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) [2022-07-22 21:41:17,854 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:17,854 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] [2022-07-22 21:41:17,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 21:41:17,855 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:41:17,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:17,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1467056166, now seen corresponding path program 1 times [2022-07-22 21:41:17,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:17,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123470485] [2022-07-22 21:41:17,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:17,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:17,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 21:41:17,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:17,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123470485] [2022-07-22 21:41:17,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123470485] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:17,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:17,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:41:17,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484214343] [2022-07-22 21:41:17,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:17,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:41:17,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:17,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:41:17,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:41:17,893 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 353 [2022-07-22 21:41:17,894 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) [2022-07-22 21:41:17,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:17,894 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 353 [2022-07-22 21:41:17,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:18,197 INFO L129 PetriNetUnfolder]: 176/2079 cut-off events. [2022-07-22 21:41:18,198 INFO L130 PetriNetUnfolder]: For 171/302 co-relation queries the response was YES. [2022-07-22 21:41:18,210 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. [2022-07-22 21:41:18,215 INFO L132 encePairwiseOnDemand]: 348/353 looper letters, 35 selfloop transitions, 4 changer transitions 0/372 dead transitions. [2022-07-22 21:41:18,215 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 372 transitions, 1135 flow [2022-07-22 21:41:18,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:41:18,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:41:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1611 transitions. [2022-07-22 21:41:18,218 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9127478753541076 [2022-07-22 21:41:18,218 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1611 transitions. [2022-07-22 21:41:18,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1611 transitions. [2022-07-22 21:41:18,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:18,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1611 transitions. [2022-07-22 21:41:18,222 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) [2022-07-22 21:41:18,224 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) [2022-07-22 21:41:18,224 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) [2022-07-22 21:41:18,225 INFO L186 Difference]: Start difference. First operand has 358 places, 363 transitions, 1032 flow. Second operand 5 states and 1611 transitions. [2022-07-22 21:41:18,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 372 transitions, 1135 flow [2022-07-22 21:41:18,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 372 transitions, 1133 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-22 21:41:18,232 INFO L242 Difference]: Finished difference. Result has 363 places, 363 transitions, 1044 flow [2022-07-22 21:41:18,232 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} [2022-07-22 21:41:18,233 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 49 predicate places. [2022-07-22 21:41:18,233 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 363 transitions, 1044 flow [2022-07-22 21:41:18,233 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) [2022-07-22 21:41:18,234 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:18,234 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] [2022-07-22 21:41:18,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 21:41:18,234 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:41:18,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:18,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1559069933, now seen corresponding path program 1 times [2022-07-22 21:41:18,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:18,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347459891] [2022-07-22 21:41:18,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:18,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:18,281 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 21:41:18,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:18,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347459891] [2022-07-22 21:41:18,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347459891] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:18,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:18,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:41:18,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239303564] [2022-07-22 21:41:18,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:18,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:41:18,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:18,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:41:18,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:41:18,285 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 353 [2022-07-22 21:41:18,286 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) [2022-07-22 21:41:18,286 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:18,286 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 353 [2022-07-22 21:41:18,286 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:19,545 INFO L129 PetriNetUnfolder]: 1757/9306 cut-off events. [2022-07-22 21:41:19,545 INFO L130 PetriNetUnfolder]: For 3062/3087 co-relation queries the response was YES. [2022-07-22 21:41:19,590 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. [2022-07-22 21:41:19,618 INFO L132 encePairwiseOnDemand]: 343/353 looper letters, 184 selfloop transitions, 36 changer transitions 0/527 dead transitions. [2022-07-22 21:41:19,618 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 527 transitions, 2115 flow [2022-07-22 21:41:19,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 21:41:19,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-22 21:41:19,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 5234 transitions. [2022-07-22 21:41:19,626 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.872187968671888 [2022-07-22 21:41:19,626 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 5234 transitions. [2022-07-22 21:41:19,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 5234 transitions. [2022-07-22 21:41:19,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:19,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 5234 transitions. [2022-07-22 21:41:19,635 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) [2022-07-22 21:41:19,642 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) [2022-07-22 21:41:19,643 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) [2022-07-22 21:41:19,643 INFO L186 Difference]: Start difference. First operand has 363 places, 363 transitions, 1044 flow. Second operand 17 states and 5234 transitions. [2022-07-22 21:41:19,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 527 transitions, 2115 flow [2022-07-22 21:41:19,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 527 transitions, 2093 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-07-22 21:41:19,662 INFO L242 Difference]: Finished difference. Result has 385 places, 391 transitions, 1302 flow [2022-07-22 21:41:19,662 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} [2022-07-22 21:41:19,663 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 71 predicate places. [2022-07-22 21:41:19,663 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 391 transitions, 1302 flow [2022-07-22 21:41:19,664 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) [2022-07-22 21:41:19,664 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:19,665 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] [2022-07-22 21:41:19,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 21:41:19,666 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:41:19,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:19,666 INFO L85 PathProgramCache]: Analyzing trace with hash 446122812, now seen corresponding path program 1 times [2022-07-22 21:41:19,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:19,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902287358] [2022-07-22 21:41:19,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:19,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 21:41:19,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:19,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902287358] [2022-07-22 21:41:19,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902287358] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:19,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:19,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:41:19,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420709358] [2022-07-22 21:41:19,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:19,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:41:19,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:19,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:41:19,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:41:19,706 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 353 [2022-07-22 21:41:19,707 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) [2022-07-22 21:41:19,707 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:19,707 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 353 [2022-07-22 21:41:19,707 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:20,865 INFO L129 PetriNetUnfolder]: 1134/9270 cut-off events. [2022-07-22 21:41:20,866 INFO L130 PetriNetUnfolder]: For 2880/2898 co-relation queries the response was YES. [2022-07-22 21:41:20,911 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. [2022-07-22 21:41:20,931 INFO L132 encePairwiseOnDemand]: 349/353 looper letters, 55 selfloop transitions, 3 changer transitions 0/412 dead transitions. [2022-07-22 21:41:20,931 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 412 transitions, 1493 flow [2022-07-22 21:41:20,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:41:20,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:41:20,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 972 transitions. [2022-07-22 21:41:20,933 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9178470254957507 [2022-07-22 21:41:20,933 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 972 transitions. [2022-07-22 21:41:20,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 972 transitions. [2022-07-22 21:41:20,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:20,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 972 transitions. [2022-07-22 21:41:20,935 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) [2022-07-22 21:41:20,937 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) [2022-07-22 21:41:20,937 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) [2022-07-22 21:41:20,937 INFO L186 Difference]: Start difference. First operand has 385 places, 391 transitions, 1302 flow. Second operand 3 states and 972 transitions. [2022-07-22 21:41:20,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 412 transitions, 1493 flow [2022-07-22 21:41:20,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 412 transitions, 1459 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-07-22 21:41:20,958 INFO L242 Difference]: Finished difference. Result has 385 places, 393 transitions, 1290 flow [2022-07-22 21:41:20,958 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} [2022-07-22 21:41:20,959 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 71 predicate places. [2022-07-22 21:41:20,959 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 393 transitions, 1290 flow [2022-07-22 21:41:20,960 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) [2022-07-22 21:41:20,960 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:20,960 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] [2022-07-22 21:41:20,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 21:41:20,960 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:41:20,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:20,961 INFO L85 PathProgramCache]: Analyzing trace with hash 2055578978, now seen corresponding path program 1 times [2022-07-22 21:41:20,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:20,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363291141] [2022-07-22 21:41:20,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:20,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 21:41:21,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:21,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363291141] [2022-07-22 21:41:21,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363291141] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:21,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:21,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:41:21,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474935330] [2022-07-22 21:41:21,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:21,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:41:21,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:21,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:41:21,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:41:21,014 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 353 [2022-07-22 21:41:21,015 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) [2022-07-22 21:41:21,015 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:21,015 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 353 [2022-07-22 21:41:21,015 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:21,599 INFO L129 PetriNetUnfolder]: 296/3307 cut-off events. [2022-07-22 21:41:21,599 INFO L130 PetriNetUnfolder]: For 740/946 co-relation queries the response was YES. [2022-07-22 21:41:21,628 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. [2022-07-22 21:41:21,637 INFO L132 encePairwiseOnDemand]: 343/353 looper letters, 44 selfloop transitions, 19 changer transitions 0/412 dead transitions. [2022-07-22 21:41:21,637 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 412 transitions, 1473 flow [2022-07-22 21:41:21,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:41:21,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:41:21,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2239 transitions. [2022-07-22 21:41:21,641 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9061108862808579 [2022-07-22 21:41:21,641 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2239 transitions. [2022-07-22 21:41:21,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2239 transitions. [2022-07-22 21:41:21,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:21,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2239 transitions. [2022-07-22 21:41:21,645 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) [2022-07-22 21:41:21,648 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) [2022-07-22 21:41:21,649 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) [2022-07-22 21:41:21,649 INFO L186 Difference]: Start difference. First operand has 385 places, 393 transitions, 1290 flow. Second operand 7 states and 2239 transitions. [2022-07-22 21:41:21,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 412 transitions, 1473 flow [2022-07-22 21:41:21,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 412 transitions, 1467 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-22 21:41:21,661 INFO L242 Difference]: Finished difference. Result has 392 places, 399 transitions, 1374 flow [2022-07-22 21:41:21,662 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} [2022-07-22 21:41:21,662 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 78 predicate places. [2022-07-22 21:41:21,663 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 399 transitions, 1374 flow [2022-07-22 21:41:21,663 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) [2022-07-22 21:41:21,663 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:21,664 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] [2022-07-22 21:41:21,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 21:41:21,664 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:41:21,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:21,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1907405474, now seen corresponding path program 1 times [2022-07-22 21:41:21,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:21,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517061151] [2022-07-22 21:41:21,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:21,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:21,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 21:41:21,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:21,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517061151] [2022-07-22 21:41:21,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517061151] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:21,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:21,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:41:21,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888172388] [2022-07-22 21:41:21,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:21,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:41:21,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:21,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:41:21,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:41:21,706 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 353 [2022-07-22 21:41:21,707 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) [2022-07-22 21:41:21,707 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:21,707 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 353 [2022-07-22 21:41:21,707 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:22,931 INFO L129 PetriNetUnfolder]: 1050/9717 cut-off events. [2022-07-22 21:41:22,931 INFO L130 PetriNetUnfolder]: For 3278/3323 co-relation queries the response was YES. [2022-07-22 21:41:22,986 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. [2022-07-22 21:41:23,009 INFO L132 encePairwiseOnDemand]: 350/353 looper letters, 53 selfloop transitions, 2 changer transitions 0/415 dead transitions. [2022-07-22 21:41:23,009 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 415 transitions, 1539 flow [2022-07-22 21:41:23,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:41:23,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:41:23,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 969 transitions. [2022-07-22 21:41:23,011 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9150141643059491 [2022-07-22 21:41:23,011 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 969 transitions. [2022-07-22 21:41:23,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 969 transitions. [2022-07-22 21:41:23,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:23,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 969 transitions. [2022-07-22 21:41:23,013 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) [2022-07-22 21:41:23,014 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) [2022-07-22 21:41:23,014 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) [2022-07-22 21:41:23,014 INFO L186 Difference]: Start difference. First operand has 392 places, 399 transitions, 1374 flow. Second operand 3 states and 969 transitions. [2022-07-22 21:41:23,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 415 transitions, 1539 flow [2022-07-22 21:41:23,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 415 transitions, 1521 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-07-22 21:41:23,037 INFO L242 Difference]: Finished difference. Result has 393 places, 399 transitions, 1364 flow [2022-07-22 21:41:23,038 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} [2022-07-22 21:41:23,038 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 79 predicate places. [2022-07-22 21:41:23,038 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 399 transitions, 1364 flow [2022-07-22 21:41:23,038 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) [2022-07-22 21:41:23,039 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:23,039 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] [2022-07-22 21:41:23,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 21:41:23,039 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:41:23,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:23,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1289922524, now seen corresponding path program 1 times [2022-07-22 21:41:23,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:23,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072113745] [2022-07-22 21:41:23,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:23,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:23,087 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 21:41:23,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:23,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072113745] [2022-07-22 21:41:23,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072113745] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:23,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:23,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:41:23,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847834059] [2022-07-22 21:41:23,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:23,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:41:23,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:23,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:41:23,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:41:23,090 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 353 [2022-07-22 21:41:23,091 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) [2022-07-22 21:41:23,091 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:23,091 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 353 [2022-07-22 21:41:23,091 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:23,722 INFO L129 PetriNetUnfolder]: 338/3933 cut-off events. [2022-07-22 21:41:23,722 INFO L130 PetriNetUnfolder]: For 813/1024 co-relation queries the response was YES. [2022-07-22 21:41:23,757 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. [2022-07-22 21:41:23,767 INFO L132 encePairwiseOnDemand]: 341/353 looper letters, 41 selfloop transitions, 12 changer transitions 0/424 dead transitions. [2022-07-22 21:41:23,767 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 424 transitions, 1539 flow [2022-07-22 21:41:23,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:41:23,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:41:23,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2248 transitions. [2022-07-22 21:41:23,770 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9097531363820316 [2022-07-22 21:41:23,770 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2248 transitions. [2022-07-22 21:41:23,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2248 transitions. [2022-07-22 21:41:23,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:23,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2248 transitions. [2022-07-22 21:41:23,774 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) [2022-07-22 21:41:23,776 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) [2022-07-22 21:41:23,776 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) [2022-07-22 21:41:23,776 INFO L186 Difference]: Start difference. First operand has 393 places, 399 transitions, 1364 flow. Second operand 7 states and 2248 transitions. [2022-07-22 21:41:23,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 424 transitions, 1539 flow [2022-07-22 21:41:23,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 424 transitions, 1537 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:41:23,789 INFO L242 Difference]: Finished difference. Result has 403 places, 410 transitions, 1461 flow [2022-07-22 21:41:23,789 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} [2022-07-22 21:41:23,790 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 89 predicate places. [2022-07-22 21:41:23,790 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 410 transitions, 1461 flow [2022-07-22 21:41:23,790 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) [2022-07-22 21:41:23,790 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:23,791 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] [2022-07-22 21:41:23,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 21:41:23,791 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:41:23,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:23,791 INFO L85 PathProgramCache]: Analyzing trace with hash 743740860, now seen corresponding path program 1 times [2022-07-22 21:41:23,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:23,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136446736] [2022-07-22 21:41:23,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:23,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 21:41:23,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:23,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136446736] [2022-07-22 21:41:23,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136446736] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:23,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:23,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:41:23,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268833481] [2022-07-22 21:41:23,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:23,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:41:23,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:23,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:41:23,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:41:23,850 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 353 [2022-07-22 21:41:23,851 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) [2022-07-22 21:41:23,851 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:23,851 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 353 [2022-07-22 21:41:23,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:24,633 INFO L129 PetriNetUnfolder]: 401/5034 cut-off events. [2022-07-22 21:41:24,633 INFO L130 PetriNetUnfolder]: For 1430/1843 co-relation queries the response was YES. [2022-07-22 21:41:24,684 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. [2022-07-22 21:41:24,700 INFO L132 encePairwiseOnDemand]: 337/353 looper letters, 50 selfloop transitions, 17 changer transitions 0/435 dead transitions. [2022-07-22 21:41:24,700 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 435 transitions, 1692 flow [2022-07-22 21:41:24,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:41:24,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:41:24,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2551 transitions. [2022-07-22 21:41:24,706 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9033286118980169 [2022-07-22 21:41:24,706 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2551 transitions. [2022-07-22 21:41:24,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2551 transitions. [2022-07-22 21:41:24,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:24,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2551 transitions. [2022-07-22 21:41:24,710 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) [2022-07-22 21:41:24,713 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) [2022-07-22 21:41:24,713 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) [2022-07-22 21:41:24,713 INFO L186 Difference]: Start difference. First operand has 403 places, 410 transitions, 1461 flow. Second operand 8 states and 2551 transitions. [2022-07-22 21:41:24,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 435 transitions, 1692 flow [2022-07-22 21:41:24,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 435 transitions, 1690 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-22 21:41:24,731 INFO L242 Difference]: Finished difference. Result has 414 places, 419 transitions, 1582 flow [2022-07-22 21:41:24,732 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} [2022-07-22 21:41:24,732 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 100 predicate places. [2022-07-22 21:41:24,732 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 419 transitions, 1582 flow [2022-07-22 21:41:24,733 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) [2022-07-22 21:41:24,733 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:24,733 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] [2022-07-22 21:41:24,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 21:41:24,733 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:41:24,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:24,734 INFO L85 PathProgramCache]: Analyzing trace with hash -2031545637, now seen corresponding path program 1 times [2022-07-22 21:41:24,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:24,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508284579] [2022-07-22 21:41:24,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:24,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 21:41:24,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:24,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508284579] [2022-07-22 21:41:24,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508284579] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:24,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:24,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:41:24,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439198844] [2022-07-22 21:41:24,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:24,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:41:24,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:24,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:41:24,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:41:24,774 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 353 [2022-07-22 21:41:24,775 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) [2022-07-22 21:41:24,775 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:24,775 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 353 [2022-07-22 21:41:24,775 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:25,771 INFO L129 PetriNetUnfolder]: 742/6727 cut-off events. [2022-07-22 21:41:25,772 INFO L130 PetriNetUnfolder]: For 2958/2985 co-relation queries the response was YES. [2022-07-22 21:41:25,816 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. [2022-07-22 21:41:25,829 INFO L132 encePairwiseOnDemand]: 343/353 looper letters, 46 selfloop transitions, 19 changer transitions 0/436 dead transitions. [2022-07-22 21:41:25,829 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 436 transitions, 1768 flow [2022-07-22 21:41:25,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:41:25,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:41:25,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2238 transitions. [2022-07-22 21:41:25,831 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.905706191825172 [2022-07-22 21:41:25,831 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2238 transitions. [2022-07-22 21:41:25,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2238 transitions. [2022-07-22 21:41:25,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:25,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2238 transitions. [2022-07-22 21:41:25,834 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) [2022-07-22 21:41:25,836 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) [2022-07-22 21:41:25,836 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 353.0) internal successors, (2824), 8 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:25,836 INFO L186 Difference]: Start difference. First operand has 414 places, 419 transitions, 1582 flow. Second operand 7 states and 2238 transitions. [2022-07-22 21:41:25,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 436 transitions, 1768 flow [2022-07-22 21:41:25,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 436 transitions, 1749 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-07-22 21:41:25,856 INFO L242 Difference]: Finished difference. Result has 420 places, 425 transitions, 1659 flow [2022-07-22 21:41:25,857 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} [2022-07-22 21:41:25,857 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 106 predicate places. [2022-07-22 21:41:25,857 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 425 transitions, 1659 flow [2022-07-22 21:41:25,858 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) [2022-07-22 21:41:25,858 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:25,858 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] [2022-07-22 21:41:25,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 21:41:25,858 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:41:25,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:25,859 INFO L85 PathProgramCache]: Analyzing trace with hash -353053735, now seen corresponding path program 1 times [2022-07-22 21:41:25,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:25,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368041780] [2022-07-22 21:41:25,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:25,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 21:41:25,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:25,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368041780] [2022-07-22 21:41:25,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368041780] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:25,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:25,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:41:25,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627902128] [2022-07-22 21:41:25,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:25,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:41:25,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:25,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:41:25,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:41:25,913 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 353 [2022-07-22 21:41:25,914 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) [2022-07-22 21:41:25,914 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:25,914 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 353 [2022-07-22 21:41:25,914 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:27,252 INFO L129 PetriNetUnfolder]: 918/8177 cut-off events. [2022-07-22 21:41:27,253 INFO L130 PetriNetUnfolder]: For 3841/3874 co-relation queries the response was YES. [2022-07-22 21:41:27,310 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. [2022-07-22 21:41:27,325 INFO L132 encePairwiseOnDemand]: 337/353 looper letters, 39 selfloop transitions, 17 changer transitions 0/450 dead transitions. [2022-07-22 21:41:27,325 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 450 transitions, 1838 flow [2022-07-22 21:41:27,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:41:27,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:41:27,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2550 transitions. [2022-07-22 21:41:27,327 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9029745042492918 [2022-07-22 21:41:27,327 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2550 transitions. [2022-07-22 21:41:27,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2550 transitions. [2022-07-22 21:41:27,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:27,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2550 transitions. [2022-07-22 21:41:27,330 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) [2022-07-22 21:41:27,332 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) [2022-07-22 21:41:27,332 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) [2022-07-22 21:41:27,333 INFO L186 Difference]: Start difference. First operand has 420 places, 425 transitions, 1659 flow. Second operand 8 states and 2550 transitions. [2022-07-22 21:41:27,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 450 transitions, 1838 flow [2022-07-22 21:41:27,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 450 transitions, 1814 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-07-22 21:41:27,360 INFO L242 Difference]: Finished difference. Result has 429 places, 435 transitions, 1744 flow [2022-07-22 21:41:27,360 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} [2022-07-22 21:41:27,361 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 115 predicate places. [2022-07-22 21:41:27,361 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 435 transitions, 1744 flow [2022-07-22 21:41:27,361 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) [2022-07-22 21:41:27,361 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:27,362 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:41:27,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 21:41:27,362 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:41:27,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:27,362 INFO L85 PathProgramCache]: Analyzing trace with hash -845106151, now seen corresponding path program 1 times [2022-07-22 21:41:27,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:27,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360688972] [2022-07-22 21:41:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:27,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 21:41:27,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:27,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360688972] [2022-07-22 21:41:27,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360688972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:27,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:27,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:41:27,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531654168] [2022-07-22 21:41:27,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:27,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:41:27,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:27,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:41:27,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:41:27,391 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 353 [2022-07-22 21:41:27,392 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) [2022-07-22 21:41:27,392 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:27,392 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 353 [2022-07-22 21:41:27,392 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:31,214 INFO L129 PetriNetUnfolder]: 2636/22931 cut-off events. [2022-07-22 21:41:31,214 INFO L130 PetriNetUnfolder]: For 13048/13767 co-relation queries the response was YES. [2022-07-22 21:41:31,565 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. [2022-07-22 21:41:31,626 INFO L132 encePairwiseOnDemand]: 349/353 looper letters, 51 selfloop transitions, 3 changer transitions 0/452 dead transitions. [2022-07-22 21:41:31,626 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 452 transitions, 1912 flow [2022-07-22 21:41:31,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:41:31,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:41:31,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 969 transitions. [2022-07-22 21:41:31,627 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9150141643059491 [2022-07-22 21:41:31,627 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 969 transitions. [2022-07-22 21:41:31,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 969 transitions. [2022-07-22 21:41:31,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:31,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 969 transitions. [2022-07-22 21:41:31,629 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) [2022-07-22 21:41:31,630 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) [2022-07-22 21:41:31,630 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) [2022-07-22 21:41:31,630 INFO L186 Difference]: Start difference. First operand has 429 places, 435 transitions, 1744 flow. Second operand 3 states and 969 transitions. [2022-07-22 21:41:31,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 452 transitions, 1912 flow [2022-07-22 21:41:31,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 452 transitions, 1899 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-07-22 21:41:31,764 INFO L242 Difference]: Finished difference. Result has 430 places, 437 transitions, 1753 flow [2022-07-22 21:41:31,764 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} [2022-07-22 21:41:31,765 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 116 predicate places. [2022-07-22 21:41:31,765 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 437 transitions, 1753 flow [2022-07-22 21:41:31,765 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) [2022-07-22 21:41:31,765 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:31,766 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] [2022-07-22 21:41:31,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 21:41:31,766 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:41:31,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:31,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1195815087, now seen corresponding path program 1 times [2022-07-22 21:41:31,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:31,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878852947] [2022-07-22 21:41:31,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:31,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 21:41:31,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:31,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878852947] [2022-07-22 21:41:31,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878852947] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:31,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:31,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:41:31,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804584239] [2022-07-22 21:41:31,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:31,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:41:31,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:31,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:41:31,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:41:31,831 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 353 [2022-07-22 21:41:31,833 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) [2022-07-22 21:41:31,833 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:31,833 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 353 [2022-07-22 21:41:31,833 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:34,519 INFO L129 PetriNetUnfolder]: 1584/15283 cut-off events. [2022-07-22 21:41:34,520 INFO L130 PetriNetUnfolder]: For 7548/7612 co-relation queries the response was YES. [2022-07-22 21:41:34,716 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. [2022-07-22 21:41:34,757 INFO L132 encePairwiseOnDemand]: 341/353 looper letters, 48 selfloop transitions, 13 changer transitions 0/460 dead transitions. [2022-07-22 21:41:34,757 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 460 transitions, 1961 flow [2022-07-22 21:41:34,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:41:34,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:41:34,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2247 transitions. [2022-07-22 21:41:34,759 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9093484419263456 [2022-07-22 21:41:34,759 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2247 transitions. [2022-07-22 21:41:34,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2247 transitions. [2022-07-22 21:41:34,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:34,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2247 transitions. [2022-07-22 21:41:34,761 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) [2022-07-22 21:41:34,763 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) [2022-07-22 21:41:34,763 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) [2022-07-22 21:41:34,763 INFO L186 Difference]: Start difference. First operand has 430 places, 437 transitions, 1753 flow. Second operand 7 states and 2247 transitions. [2022-07-22 21:41:34,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 460 transitions, 1961 flow [2022-07-22 21:41:34,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 460 transitions, 1955 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-22 21:41:34,819 INFO L242 Difference]: Finished difference. Result has 439 places, 447 transitions, 1860 flow [2022-07-22 21:41:34,819 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} [2022-07-22 21:41:34,820 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 125 predicate places. [2022-07-22 21:41:34,820 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 447 transitions, 1860 flow [2022-07-22 21:41:34,820 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) [2022-07-22 21:41:34,820 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:34,820 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] [2022-07-22 21:41:34,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 21:41:34,821 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:41:34,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:34,821 INFO L85 PathProgramCache]: Analyzing trace with hash 315906300, now seen corresponding path program 1 times [2022-07-22 21:41:34,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:34,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392248129] [2022-07-22 21:41:34,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:34,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:34,874 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 21:41:34,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:34,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392248129] [2022-07-22 21:41:34,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392248129] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:34,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:34,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:41:34,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278297329] [2022-07-22 21:41:34,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:34,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:41:34,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:34,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:41:34,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:41:34,877 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 353 [2022-07-22 21:41:34,878 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) [2022-07-22 21:41:34,878 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:34,878 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 353 [2022-07-22 21:41:34,878 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:44,736 INFO L129 PetriNetUnfolder]: 9963/57728 cut-off events. [2022-07-22 21:41:44,737 INFO L130 PetriNetUnfolder]: For 51109/51720 co-relation queries the response was YES. [2022-07-22 21:41:45,651 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. [2022-07-22 21:41:45,775 INFO L132 encePairwiseOnDemand]: 332/353 looper letters, 286 selfloop transitions, 86 changer transitions 20/717 dead transitions. [2022-07-22 21:41:45,776 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 717 transitions, 3922 flow [2022-07-22 21:41:45,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 21:41:45,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-22 21:41:45,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 5607 transitions. [2022-07-22 21:41:45,779 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8359922469062174 [2022-07-22 21:41:45,779 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 5607 transitions. [2022-07-22 21:41:45,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 5607 transitions. [2022-07-22 21:41:45,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:45,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 5607 transitions. [2022-07-22 21:41:45,785 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) [2022-07-22 21:41:45,789 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) [2022-07-22 21:41:45,789 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) [2022-07-22 21:41:45,789 INFO L186 Difference]: Start difference. First operand has 439 places, 447 transitions, 1860 flow. Second operand 19 states and 5607 transitions. [2022-07-22 21:41:45,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 717 transitions, 3922 flow [2022-07-22 21:41:46,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 717 transitions, 3868 flow, removed 18 selfloop flow, removed 6 redundant places. [2022-07-22 21:41:46,257 INFO L242 Difference]: Finished difference. Result has 455 places, 487 transitions, 2271 flow [2022-07-22 21:41:46,257 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} [2022-07-22 21:41:46,258 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 141 predicate places. [2022-07-22 21:41:46,258 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 487 transitions, 2271 flow [2022-07-22 21:41:46,258 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) [2022-07-22 21:41:46,258 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:46,258 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] [2022-07-22 21:41:46,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 21:41:46,259 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:41:46,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:46,259 INFO L85 PathProgramCache]: Analyzing trace with hash 899792024, now seen corresponding path program 1 times [2022-07-22 21:41:46,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:46,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260111044] [2022-07-22 21:41:46,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:46,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:46,323 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 21:41:46,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:46,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260111044] [2022-07-22 21:41:46,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260111044] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:46,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:46,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:41:46,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005216601] [2022-07-22 21:41:46,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:46,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:41:46,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:46,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:41:46,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:41:46,328 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 353 [2022-07-22 21:41:46,330 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) [2022-07-22 21:41:46,330 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:46,330 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 353 [2022-07-22 21:41:46,330 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:54,742 INFO L129 PetriNetUnfolder]: 9659/46053 cut-off events. [2022-07-22 21:41:54,742 INFO L130 PetriNetUnfolder]: For 41549/42545 co-relation queries the response was YES. [2022-07-22 21:41:55,538 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. [2022-07-22 21:41:55,640 INFO L132 encePairwiseOnDemand]: 331/353 looper letters, 205 selfloop transitions, 43 changer transitions 120/672 dead transitions. [2022-07-22 21:41:55,640 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 672 transitions, 3663 flow [2022-07-22 21:41:55,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 21:41:55,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-22 21:41:55,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 5723 transitions. [2022-07-22 21:41:55,643 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8106232294617564 [2022-07-22 21:41:55,643 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 5723 transitions. [2022-07-22 21:41:55,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 5723 transitions. [2022-07-22 21:41:55,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:55,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 5723 transitions. [2022-07-22 21:41:55,649 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) [2022-07-22 21:41:55,653 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) [2022-07-22 21:41:55,654 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) [2022-07-22 21:41:55,654 INFO L186 Difference]: Start difference. First operand has 455 places, 487 transitions, 2271 flow. Second operand 20 states and 5723 transitions. [2022-07-22 21:41:55,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 672 transitions, 3663 flow [2022-07-22 21:41:55,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 672 transitions, 3420 flow, removed 42 selfloop flow, removed 14 redundant places. [2022-07-22 21:41:55,928 INFO L242 Difference]: Finished difference. Result has 464 places, 417 transitions, 1603 flow [2022-07-22 21:41:55,928 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} [2022-07-22 21:41:55,929 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 150 predicate places. [2022-07-22 21:41:55,929 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 417 transitions, 1603 flow [2022-07-22 21:41:55,929 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) [2022-07-22 21:41:55,929 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:55,930 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] [2022-07-22 21:41:55,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-22 21:41:55,930 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:41:55,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:55,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1678379906, now seen corresponding path program 1 times [2022-07-22 21:41:55,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:55,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474979554] [2022-07-22 21:41:55,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:55,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 21:41:56,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:56,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474979554] [2022-07-22 21:41:56,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474979554] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:56,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:56,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-22 21:41:56,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692065573] [2022-07-22 21:41:56,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:56,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 21:41:56,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:56,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 21:41:56,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-07-22 21:41:56,113 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 353 [2022-07-22 21:41:56,115 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) [2022-07-22 21:41:56,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:56,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 353 [2022-07-22 21:41:56,115 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:08,251 INFO L129 PetriNetUnfolder]: 16500/58485 cut-off events. [2022-07-22 21:42:08,252 INFO L130 PetriNetUnfolder]: For 40738/42909 co-relation queries the response was YES. [2022-07-22 21:42:09,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 124411 conditions, 58485 events. 16500/58485 cut-off events. For 40738/42909 co-relation queries the response was YES. Maximal size of possible extension queue 1203. Compared 779250 event pairs, 6204 based on Foata normal form. 942/57887 useless extension candidates. Maximal degree in co-relation 124348. Up to 15214 conditions per place. [2022-07-22 21:42:09,537 INFO L132 encePairwiseOnDemand]: 331/353 looper letters, 509 selfloop transitions, 62 changer transitions 5/881 dead transitions. [2022-07-22 21:42:09,537 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 881 transitions, 4481 flow [2022-07-22 21:42:09,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-22 21:42:09,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-07-22 21:42:09,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 10796 transitions. [2022-07-22 21:42:09,544 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7459407171975403 [2022-07-22 21:42:09,544 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 10796 transitions. [2022-07-22 21:42:09,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 10796 transitions. [2022-07-22 21:42:09,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:09,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 10796 transitions. [2022-07-22 21:42:09,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 263.3170731707317) internal successors, (10796), 41 states have internal predecessors, (10796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:09,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 353.0) internal successors, (14826), 42 states have internal predecessors, (14826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:09,565 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 353.0) internal successors, (14826), 42 states have internal predecessors, (14826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:09,565 INFO L186 Difference]: Start difference. First operand has 464 places, 417 transitions, 1603 flow. Second operand 41 states and 10796 transitions. [2022-07-22 21:42:09,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 881 transitions, 4481 flow [2022-07-22 21:42:09,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 881 transitions, 4225 flow, removed 83 selfloop flow, removed 29 redundant places. [2022-07-22 21:42:09,921 INFO L242 Difference]: Finished difference. Result has 463 places, 467 transitions, 1878 flow [2022-07-22 21:42:09,921 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=1878, PETRI_PLACES=463, PETRI_TRANSITIONS=467} [2022-07-22 21:42:09,922 INFO L279 CegarLoopForPetriNet]: 314 programPoint places, 149 predicate places. [2022-07-22 21:42:09,922 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 467 transitions, 1878 flow [2022-07-22 21:42:09,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-07-22 21:42:09,922 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:09,923 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] [2022-07-22 21:42:09,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-22 21:42:09,923 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:42:09,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:09,923 INFO L85 PathProgramCache]: Analyzing trace with hash -50112556, now seen corresponding path program 2 times [2022-07-22 21:42:09,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:09,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837698772] [2022-07-22 21:42:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:09,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:09,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 21:42:10,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:10,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837698772] [2022-07-22 21:42:10,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837698772] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:10,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:10,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-22 21:42:10,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610285871] [2022-07-22 21:42:10,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:10,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 21:42:10,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:10,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 21:42:10,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-07-22 21:42:10,071 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 353 [2022-07-22 21:42:10,073 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 467 transitions, 1878 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) [2022-07-22 21:42:10,073 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:10,073 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 353 [2022-07-22 21:42:10,073 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand