/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 06:39:42,697 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 06:39:42,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 06:39:42,731 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 06:39:42,732 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 06:39:42,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 06:39:42,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 06:39:42,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 06:39:42,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 06:39:42,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 06:39:42,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 06:39:42,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 06:39:42,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 06:39:42,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 06:39:42,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 06:39:42,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 06:39:42,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 06:39:42,752 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 06:39:42,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 06:39:42,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 06:39:42,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 06:39:42,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 06:39:42,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 06:39:42,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 06:39:42,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-28 06:39:42,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 06:39:42,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 06:39:42,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 06:39:42,774 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 06:39:42,796 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 06:39:42,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 06:39:42,797 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 06:39:42,797 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 06:39:42,799 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 06:39:42,799 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 06:39:42,799 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 06:39:42,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 06:39:42,799 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 06:39:42,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 06:39:42,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 06:39:42,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 06:39:42,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 06:39:42,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 06:39:42,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 06:39:42,800 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 06:39:42,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 06:39:42,800 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 06:39:42,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 06:39:42,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 06:39:42,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 06:39:42,800 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 06:39:42,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 06:39:42,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 06:39:42,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 06:39:42,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 06:39:42,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 06:39:42,801 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 06:39:42,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 06:39:42,802 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 06:39:42,802 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 06:39:42,802 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 06:39:43,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 06:39:43,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 06:39:43,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 06:39:43,046 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 06:39:43,047 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 06:39:43,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i [2023-01-28 06:39:44,191 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 06:39:44,351 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 06:39:44,351 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i [2023-01-28 06:39:44,360 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/074458566/a46c4c1e77a348a9950516cc3d9fa6a6/FLAG15d7b124d [2023-01-28 06:39:44,372 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/074458566/a46c4c1e77a348a9950516cc3d9fa6a6 [2023-01-28 06:39:44,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 06:39:44,376 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 06:39:44,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 06:39:44,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 06:39:44,380 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 06:39:44,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 06:39:44" (1/1) ... [2023-01-28 06:39:44,382 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d791854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:44, skipping insertion in model container [2023-01-28 06:39:44,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 06:39:44" (1/1) ... [2023-01-28 06:39:44,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 06:39:44,434 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 06:39:44,658 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i[30553,30566] [2023-01-28 06:39:44,666 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 06:39:44,673 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 06:39:44,703 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i[30553,30566] [2023-01-28 06:39:44,713 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 06:39:44,739 INFO L208 MainTranslator]: Completed translation [2023-01-28 06:39:44,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:44 WrapperNode [2023-01-28 06:39:44,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 06:39:44,740 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 06:39:44,741 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 06:39:44,741 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 06:39:44,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:44" (1/1) ... [2023-01-28 06:39:44,767 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:44" (1/1) ... [2023-01-28 06:39:44,786 INFO L138 Inliner]: procedures = 172, calls = 27, calls flagged for inlining = 11, calls inlined = 15, statements flattened = 126 [2023-01-28 06:39:44,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 06:39:44,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 06:39:44,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 06:39:44,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 06:39:44,793 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:44" (1/1) ... [2023-01-28 06:39:44,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:44" (1/1) ... [2023-01-28 06:39:44,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:44" (1/1) ... [2023-01-28 06:39:44,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:44" (1/1) ... [2023-01-28 06:39:44,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:44" (1/1) ... [2023-01-28 06:39:44,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:44" (1/1) ... [2023-01-28 06:39:44,813 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:44" (1/1) ... [2023-01-28 06:39:44,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:44" (1/1) ... [2023-01-28 06:39:44,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 06:39:44,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 06:39:44,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 06:39:44,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 06:39:44,816 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:44" (1/1) ... [2023-01-28 06:39:44,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 06:39:44,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:39:44,844 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-28 06:39:44,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 06:39:44,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 06:39:44,877 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-01-28 06:39:44,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-01-28 06:39:44,877 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-01-28 06:39:44,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-01-28 06:39:44,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 06:39:44,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 06:39:44,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 06:39:44,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 06:39:44,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 06:39:44,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 06:39:44,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 06:39:44,879 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 06:39:44,993 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 06:39:44,995 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 06:39:45,154 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 06:39:45,321 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 06:39:45,322 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-28 06:39:45,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 06:39:45 BoogieIcfgContainer [2023-01-28 06:39:45,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 06:39:45,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 06:39:45,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 06:39:45,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 06:39:45,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 06:39:44" (1/3) ... [2023-01-28 06:39:45,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b59aada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 06:39:45, skipping insertion in model container [2023-01-28 06:39:45,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:39:44" (2/3) ... [2023-01-28 06:39:45,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b59aada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 06:39:45, skipping insertion in model container [2023-01-28 06:39:45,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 06:39:45" (3/3) ... [2023-01-28 06:39:45,329 INFO L112 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs.i [2023-01-28 06:39:45,345 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 06:39:45,346 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 06:39:45,346 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 06:39:45,397 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:39:45,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 162 flow [2023-01-28 06:39:45,477 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2023-01-28 06:39:45,477 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:39:45,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 122 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2023-01-28 06:39:45,482 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 76 transitions, 162 flow [2023-01-28 06:39:45,501 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 158 flow [2023-01-28 06:39:45,504 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:39:45,511 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 75 transitions, 158 flow [2023-01-28 06:39:45,513 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 75 transitions, 158 flow [2023-01-28 06:39:45,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 158 flow [2023-01-28 06:39:45,527 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2023-01-28 06:39:45,528 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:39:45,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 122 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2023-01-28 06:39:45,530 INFO L119 LiptonReduction]: Number of co-enabled transitions 1820 [2023-01-28 06:39:47,181 INFO L134 LiptonReduction]: Checked pairs total: 3426 [2023-01-28 06:39:47,181 INFO L136 LiptonReduction]: Total number of compositions: 59 [2023-01-28 06:39:47,191 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:39:47,196 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@49c06413, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:39:47,197 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-28 06:39:47,199 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-01-28 06:39:47,199 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:39:47,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:47,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-28 06:39:47,200 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:39:47,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:47,204 INFO L85 PathProgramCache]: Analyzing trace with hash 460053008, now seen corresponding path program 1 times [2023-01-28 06:39:47,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:47,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061750779] [2023-01-28 06:39:47,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:47,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:39:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:39:47,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:39:47,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061750779] [2023-01-28 06:39:47,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061750779] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:39:47,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:39:47,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 06:39:47,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663166710] [2023-01-28 06:39:47,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:39:47,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:39:47,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:39:47,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:39:47,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:39:47,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 135 [2023-01-28 06:39:47,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:47,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:39:47,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 135 [2023-01-28 06:39:47,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:39:47,480 INFO L130 PetriNetUnfolder]: 232/398 cut-off events. [2023-01-28 06:39:47,480 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:39:47,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 809 conditions, 398 events. 232/398 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1416 event pairs, 66 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 799. Up to 278 conditions per place. [2023-01-28 06:39:47,484 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 21 selfloop transitions, 2 changer transitions 1/26 dead transitions. [2023-01-28 06:39:47,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 26 transitions, 108 flow [2023-01-28 06:39:47,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:39:47,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:39:47,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2023-01-28 06:39:47,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.454320987654321 [2023-01-28 06:39:47,494 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2023-01-28 06:39:47,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2023-01-28 06:39:47,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:39:47,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2023-01-28 06:39:47,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:47,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:47,502 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:47,503 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 56 flow. Second operand 3 states and 184 transitions. [2023-01-28 06:39:47,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 26 transitions, 108 flow [2023-01-28 06:39:47,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 26 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 06:39:47,507 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 55 flow [2023-01-28 06:39:47,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2023-01-28 06:39:47,511 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2023-01-28 06:39:47,511 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 55 flow [2023-01-28 06:39:47,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:47,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:47,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:39:47,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 06:39:47,512 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:39:47,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:47,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1682741378, now seen corresponding path program 1 times [2023-01-28 06:39:47,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:47,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387083859] [2023-01-28 06:39:47,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:47,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:39:47,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:39:47,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:39:47,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387083859] [2023-01-28 06:39:47,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387083859] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:39:47,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:39:47,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 06:39:47,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129680653] [2023-01-28 06:39:47,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:39:47,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 06:39:47,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:39:47,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 06:39:47,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 06:39:47,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 135 [2023-01-28 06:39:47,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 55 flow. Second operand has 5 states, 5 states have (on average 50.8) internal successors, (254), 5 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:47,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:39:47,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 135 [2023-01-28 06:39:47,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:39:47,720 INFO L130 PetriNetUnfolder]: 207/350 cut-off events. [2023-01-28 06:39:47,720 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-01-28 06:39:47,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 757 conditions, 350 events. 207/350 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1144 event pairs, 29 based on Foata normal form. 3/353 useless extension candidates. Maximal degree in co-relation 745. Up to 238 conditions per place. [2023-01-28 06:39:47,723 INFO L137 encePairwiseOnDemand]: 130/135 looper letters, 29 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2023-01-28 06:39:47,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 151 flow [2023-01-28 06:39:47,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 06:39:47,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 06:39:47,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 279 transitions. [2023-01-28 06:39:47,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41333333333333333 [2023-01-28 06:39:47,725 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 279 transitions. [2023-01-28 06:39:47,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 279 transitions. [2023-01-28 06:39:47,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:39:47,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 279 transitions. [2023-01-28 06:39:47,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 55.8) internal successors, (279), 5 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:47,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:47,728 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:47,728 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 55 flow. Second operand 5 states and 279 transitions. [2023-01-28 06:39:47,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 151 flow [2023-01-28 06:39:47,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 35 transitions, 147 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 06:39:47,730 INFO L231 Difference]: Finished difference. Result has 30 places, 20 transitions, 63 flow [2023-01-28 06:39:47,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=63, PETRI_PLACES=30, PETRI_TRANSITIONS=20} [2023-01-28 06:39:47,730 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2023-01-28 06:39:47,731 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 20 transitions, 63 flow [2023-01-28 06:39:47,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 50.8) internal successors, (254), 5 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:47,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:47,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:39:47,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 06:39:47,731 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:39:47,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:47,732 INFO L85 PathProgramCache]: Analyzing trace with hash 625375123, now seen corresponding path program 1 times [2023-01-28 06:39:47,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:47,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939532691] [2023-01-28 06:39:47,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:47,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:39:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:39:47,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:39:47,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939532691] [2023-01-28 06:39:47,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939532691] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:39:47,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:39:47,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 06:39:47,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068337447] [2023-01-28 06:39:47,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:39:47,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 06:39:47,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:39:47,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 06:39:47,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-01-28 06:39:47,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 135 [2023-01-28 06:39:47,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 20 transitions, 63 flow. Second operand has 6 states, 6 states have (on average 50.666666666666664) internal successors, (304), 6 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:47,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:39:47,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 135 [2023-01-28 06:39:47,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:39:47,899 INFO L130 PetriNetUnfolder]: 192/326 cut-off events. [2023-01-28 06:39:47,899 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2023-01-28 06:39:47,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 746 conditions, 326 events. 192/326 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1042 event pairs, 20 based on Foata normal form. 9/335 useless extension candidates. Maximal degree in co-relation 733. Up to 118 conditions per place. [2023-01-28 06:39:47,901 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 33 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-01-28 06:39:47,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 179 flow [2023-01-28 06:39:47,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 06:39:47,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 06:39:47,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 333 transitions. [2023-01-28 06:39:47,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2023-01-28 06:39:47,903 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 333 transitions. [2023-01-28 06:39:47,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 333 transitions. [2023-01-28 06:39:47,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:39:47,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 333 transitions. [2023-01-28 06:39:47,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 55.5) internal successors, (333), 6 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:47,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 135.0) internal successors, (945), 7 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:47,906 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 135.0) internal successors, (945), 7 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:47,906 INFO L175 Difference]: Start difference. First operand has 30 places, 20 transitions, 63 flow. Second operand 6 states and 333 transitions. [2023-01-28 06:39:47,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 179 flow [2023-01-28 06:39:47,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 40 transitions, 171 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 06:39:47,908 INFO L231 Difference]: Finished difference. Result has 32 places, 20 transitions, 69 flow [2023-01-28 06:39:47,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=69, PETRI_PLACES=32, PETRI_TRANSITIONS=20} [2023-01-28 06:39:47,909 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2023-01-28 06:39:47,909 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 20 transitions, 69 flow [2023-01-28 06:39:47,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 50.666666666666664) internal successors, (304), 6 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:47,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:47,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:39:47,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 06:39:47,909 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:39:47,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:47,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1017679598, now seen corresponding path program 1 times [2023-01-28 06:39:47,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:47,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403040207] [2023-01-28 06:39:47,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:47,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:39:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:39:47,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:39:47,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403040207] [2023-01-28 06:39:47,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403040207] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:39:47,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:39:47,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 06:39:47,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495832861] [2023-01-28 06:39:47,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:39:47,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 06:39:47,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:39:47,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 06:39:47,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-01-28 06:39:47,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 135 [2023-01-28 06:39:47,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 20 transitions, 69 flow. Second operand has 7 states, 7 states have (on average 50.857142857142854) internal successors, (356), 7 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:47,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:39:47,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 135 [2023-01-28 06:39:47,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:39:48,095 INFO L130 PetriNetUnfolder]: 208/357 cut-off events. [2023-01-28 06:39:48,095 INFO L131 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2023-01-28 06:39:48,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 833 conditions, 357 events. 208/357 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1160 event pairs, 17 based on Foata normal form. 9/366 useless extension candidates. Maximal degree in co-relation 819. Up to 96 conditions per place. [2023-01-28 06:39:48,097 INFO L137 encePairwiseOnDemand]: 127/135 looper letters, 36 selfloop transitions, 6 changer transitions 2/46 dead transitions. [2023-01-28 06:39:48,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 46 transitions, 209 flow [2023-01-28 06:39:48,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 06:39:48,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 06:39:48,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 388 transitions. [2023-01-28 06:39:48,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105820105820106 [2023-01-28 06:39:48,099 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 388 transitions. [2023-01-28 06:39:48,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 388 transitions. [2023-01-28 06:39:48,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:39:48,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 388 transitions. [2023-01-28 06:39:48,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 55.42857142857143) internal successors, (388), 7 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:48,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 135.0) internal successors, (1080), 8 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:48,102 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 135.0) internal successors, (1080), 8 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:48,102 INFO L175 Difference]: Start difference. First operand has 32 places, 20 transitions, 69 flow. Second operand 7 states and 388 transitions. [2023-01-28 06:39:48,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 46 transitions, 209 flow [2023-01-28 06:39:48,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 46 transitions, 199 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-01-28 06:39:48,104 INFO L231 Difference]: Finished difference. Result has 35 places, 20 transitions, 79 flow [2023-01-28 06:39:48,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=79, PETRI_PLACES=35, PETRI_TRANSITIONS=20} [2023-01-28 06:39:48,104 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 8 predicate places. [2023-01-28 06:39:48,104 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 20 transitions, 79 flow [2023-01-28 06:39:48,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 50.857142857142854) internal successors, (356), 7 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:48,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:48,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:39:48,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 06:39:48,105 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:39:48,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:48,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1483297501, now seen corresponding path program 1 times [2023-01-28 06:39:48,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:48,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329503019] [2023-01-28 06:39:48,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:48,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:39:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:39:48,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:39:48,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329503019] [2023-01-28 06:39:48,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329503019] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:39:48,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:39:48,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 06:39:48,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264121410] [2023-01-28 06:39:48,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:39:48,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 06:39:48,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:39:48,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 06:39:48,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-01-28 06:39:48,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 135 [2023-01-28 06:39:48,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 20 transitions, 79 flow. Second operand has 7 states, 7 states have (on average 50.0) internal successors, (350), 7 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:48,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:39:48,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 135 [2023-01-28 06:39:48,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:39:48,300 INFO L130 PetriNetUnfolder]: 174/299 cut-off events. [2023-01-28 06:39:48,300 INFO L131 PetriNetUnfolder]: For 94/94 co-relation queries the response was YES. [2023-01-28 06:39:48,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 749 conditions, 299 events. 174/299 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 952 event pairs, 14 based on Foata normal form. 6/305 useless extension candidates. Maximal degree in co-relation 733. Up to 125 conditions per place. [2023-01-28 06:39:48,301 INFO L137 encePairwiseOnDemand]: 127/135 looper letters, 0 selfloop transitions, 0 changer transitions 43/43 dead transitions. [2023-01-28 06:39:48,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 43 transitions, 207 flow [2023-01-28 06:39:48,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 06:39:48,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 06:39:48,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 427 transitions. [2023-01-28 06:39:48,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39537037037037037 [2023-01-28 06:39:48,303 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 427 transitions. [2023-01-28 06:39:48,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 427 transitions. [2023-01-28 06:39:48,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:39:48,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 427 transitions. [2023-01-28 06:39:48,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 53.375) internal successors, (427), 8 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:48,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 135.0) internal successors, (1215), 9 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:48,305 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 135.0) internal successors, (1215), 9 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:48,305 INFO L175 Difference]: Start difference. First operand has 35 places, 20 transitions, 79 flow. Second operand 8 states and 427 transitions. [2023-01-28 06:39:48,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 43 transitions, 207 flow [2023-01-28 06:39:48,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 43 transitions, 187 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-01-28 06:39:48,307 INFO L231 Difference]: Finished difference. Result has 31 places, 0 transitions, 0 flow [2023-01-28 06:39:48,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=31, PETRI_TRANSITIONS=0} [2023-01-28 06:39:48,307 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 4 predicate places. [2023-01-28 06:39:48,307 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 0 transitions, 0 flow [2023-01-28 06:39:48,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 50.0) internal successors, (350), 7 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:48,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-01-28 06:39:48,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-28 06:39:48,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 06:39:48,310 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-01-28 06:39:48,312 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-01-28 06:39:48,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 162 flow [2023-01-28 06:39:48,320 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2023-01-28 06:39:48,320 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:39:48,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 122 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2023-01-28 06:39:48,321 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 76 transitions, 162 flow [2023-01-28 06:39:48,321 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 158 flow [2023-01-28 06:39:48,321 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:39:48,321 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 75 transitions, 158 flow [2023-01-28 06:39:48,321 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 75 transitions, 158 flow [2023-01-28 06:39:48,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 158 flow [2023-01-28 06:39:48,326 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2023-01-28 06:39:48,326 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:39:48,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 122 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2023-01-28 06:39:48,327 INFO L119 LiptonReduction]: Number of co-enabled transitions 1820 [2023-01-28 06:39:49,573 INFO L134 LiptonReduction]: Checked pairs total: 3564 [2023-01-28 06:39:49,573 INFO L136 LiptonReduction]: Total number of compositions: 59 [2023-01-28 06:39:49,574 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 06:39:49,575 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@49c06413, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:39:49,575 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-28 06:39:49,577 INFO L130 PetriNetUnfolder]: 2/20 cut-off events. [2023-01-28 06:39:49,577 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:39:49,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:49,577 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-01-28 06:39:49,577 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:39:49,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:49,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1899232887, now seen corresponding path program 1 times [2023-01-28 06:39:49,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:49,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047600889] [2023-01-28 06:39:49,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:49,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:39:49,586 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 06:39:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:39:49,603 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 06:39:49,603 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 06:39:49,603 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-28 06:39:49,603 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-01-28 06:39:49,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 06:39:49,604 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:39:49,604 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-01-28 06:39:49,605 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 06:39:49,605 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 06:39:49,631 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:39:49,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 118 transitions, 260 flow [2023-01-28 06:39:49,642 INFO L130 PetriNetUnfolder]: 8/125 cut-off events. [2023-01-28 06:39:49,642 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:39:49,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 125 events. 8/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 233 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 134. Up to 6 conditions per place. [2023-01-28 06:39:49,643 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 118 transitions, 260 flow [2023-01-28 06:39:49,643 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 103 transitions, 221 flow [2023-01-28 06:39:49,644 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:39:49,644 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 103 transitions, 221 flow [2023-01-28 06:39:49,644 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 103 transitions, 221 flow [2023-01-28 06:39:49,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 103 transitions, 221 flow [2023-01-28 06:39:49,653 INFO L130 PetriNetUnfolder]: 8/125 cut-off events. [2023-01-28 06:39:49,653 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:39:49,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 125 events. 8/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 235 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 113. Up to 6 conditions per place. [2023-01-28 06:39:49,656 INFO L119 LiptonReduction]: Number of co-enabled transitions 4762 [2023-01-28 06:39:51,171 INFO L134 LiptonReduction]: Checked pairs total: 12587 [2023-01-28 06:39:51,172 INFO L136 LiptonReduction]: Total number of compositions: 72 [2023-01-28 06:39:51,173 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:39:51,174 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@49c06413, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:39:51,174 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 06:39:51,175 INFO L130 PetriNetUnfolder]: 0/9 cut-off events. [2023-01-28 06:39:51,175 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:39:51,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:51,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-28 06:39:51,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:39:51,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:51,176 INFO L85 PathProgramCache]: Analyzing trace with hash 737311454, now seen corresponding path program 1 times [2023-01-28 06:39:51,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:51,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336237761] [2023-01-28 06:39:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:51,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:39:51,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:39:51,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:39:51,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336237761] [2023-01-28 06:39:51,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336237761] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:39:51,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:39:51,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 06:39:51,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547980398] [2023-01-28 06:39:51,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:39:51,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:39:51,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:39:51,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:39:51,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:39:51,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 190 [2023-01-28 06:39:51,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:51,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:39:51,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 190 [2023-01-28 06:39:51,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:39:51,657 INFO L130 PetriNetUnfolder]: 4526/6451 cut-off events. [2023-01-28 06:39:51,657 INFO L131 PetriNetUnfolder]: For 212/212 co-relation queries the response was YES. [2023-01-28 06:39:51,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13094 conditions, 6451 events. 4526/6451 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 34865 event pairs, 1323 based on Foata normal form. 0/5798 useless extension candidates. Maximal degree in co-relation 13083. Up to 5903 conditions per place. [2023-01-28 06:39:51,689 INFO L137 encePairwiseOnDemand]: 184/190 looper letters, 46 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-01-28 06:39:51,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 224 flow [2023-01-28 06:39:51,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:39:51,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:39:51,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 267 transitions. [2023-01-28 06:39:51,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46842105263157896 [2023-01-28 06:39:51,690 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 267 transitions. [2023-01-28 06:39:51,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 267 transitions. [2023-01-28 06:39:51,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:39:51,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 267 transitions. [2023-01-28 06:39:51,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:51,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:51,692 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:51,692 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 99 flow. Second operand 3 states and 267 transitions. [2023-01-28 06:39:51,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 224 flow [2023-01-28 06:39:51,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 221 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 06:39:51,693 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 111 flow [2023-01-28 06:39:51,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-01-28 06:39:51,695 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2023-01-28 06:39:51,695 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 111 flow [2023-01-28 06:39:51,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:51,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:51,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:39:51,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 06:39:51,696 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:39:51,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:51,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1086540050, now seen corresponding path program 1 times [2023-01-28 06:39:51,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:51,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469051788] [2023-01-28 06:39:51,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:51,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:39:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:39:51,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:39:51,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469051788] [2023-01-28 06:39:51,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469051788] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:39:51,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:39:51,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 06:39:51,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699430925] [2023-01-28 06:39:51,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:39:51,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 06:39:51,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:39:51,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 06:39:51,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 06:39:51,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 190 [2023-01-28 06:39:51,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 111 flow. Second operand has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:51,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:39:51,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 190 [2023-01-28 06:39:51,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:39:52,356 INFO L130 PetriNetUnfolder]: 5404/7701 cut-off events. [2023-01-28 06:39:52,356 INFO L131 PetriNetUnfolder]: For 806/806 co-relation queries the response was YES. [2023-01-28 06:39:52,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16386 conditions, 7701 events. 5404/7701 cut-off events. For 806/806 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 43823 event pairs, 1265 based on Foata normal form. 56/7456 useless extension candidates. Maximal degree in co-relation 16373. Up to 5835 conditions per place. [2023-01-28 06:39:52,390 INFO L137 encePairwiseOnDemand]: 180/190 looper letters, 95 selfloop transitions, 17 changer transitions 0/116 dead transitions. [2023-01-28 06:39:52,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 116 transitions, 514 flow [2023-01-28 06:39:52,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 06:39:52,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 06:39:52,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 597 transitions. [2023-01-28 06:39:52,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4488721804511278 [2023-01-28 06:39:52,392 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 597 transitions. [2023-01-28 06:39:52,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 597 transitions. [2023-01-28 06:39:52,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:39:52,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 597 transitions. [2023-01-28 06:39:52,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 85.28571428571429) internal successors, (597), 7 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:52,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 190.0) internal successors, (1520), 8 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:52,395 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 190.0) internal successors, (1520), 8 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:52,396 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 111 flow. Second operand 7 states and 597 transitions. [2023-01-28 06:39:52,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 116 transitions, 514 flow [2023-01-28 06:39:52,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 116 transitions, 510 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 06:39:52,398 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 227 flow [2023-01-28 06:39:52,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=227, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2023-01-28 06:39:52,398 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 9 predicate places. [2023-01-28 06:39:52,398 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 227 flow [2023-01-28 06:39:52,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:52,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:52,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:39:52,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 06:39:52,399 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:39:52,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:52,399 INFO L85 PathProgramCache]: Analyzing trace with hash 487940530, now seen corresponding path program 1 times [2023-01-28 06:39:52,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:52,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048085459] [2023-01-28 06:39:52,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:52,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:39:52,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:39:52,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:39:52,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048085459] [2023-01-28 06:39:52,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048085459] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:39:52,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:39:52,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 06:39:52,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202156234] [2023-01-28 06:39:52,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:39:52,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 06:39:52,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:39:52,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 06:39:52,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-01-28 06:39:52,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 190 [2023-01-28 06:39:52,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 227 flow. Second operand has 7 states, 7 states have (on average 69.71428571428571) internal successors, (488), 7 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:52,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:39:52,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 190 [2023-01-28 06:39:52,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:39:53,242 INFO L130 PetriNetUnfolder]: 6440/9205 cut-off events. [2023-01-28 06:39:53,243 INFO L131 PetriNetUnfolder]: For 4502/4502 co-relation queries the response was YES. [2023-01-28 06:39:53,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23027 conditions, 9205 events. 6440/9205 cut-off events. For 4502/4502 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 54740 event pairs, 883 based on Foata normal form. 112/9024 useless extension candidates. Maximal degree in co-relation 23009. Up to 5369 conditions per place. [2023-01-28 06:39:53,298 INFO L137 encePairwiseOnDemand]: 179/190 looper letters, 126 selfloop transitions, 23 changer transitions 0/153 dead transitions. [2023-01-28 06:39:53,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 153 transitions, 798 flow [2023-01-28 06:39:53,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 06:39:53,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 06:39:53,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 762 transitions. [2023-01-28 06:39:53,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4456140350877193 [2023-01-28 06:39:53,301 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 762 transitions. [2023-01-28 06:39:53,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 762 transitions. [2023-01-28 06:39:53,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:39:53,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 762 transitions. [2023-01-28 06:39:53,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 84.66666666666667) internal successors, (762), 9 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:53,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 190.0) internal successors, (1900), 10 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:53,306 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 190.0) internal successors, (1900), 10 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:53,306 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 227 flow. Second operand 9 states and 762 transitions. [2023-01-28 06:39:53,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 153 transitions, 798 flow [2023-01-28 06:39:53,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 153 transitions, 790 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-28 06:39:53,318 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 321 flow [2023-01-28 06:39:53,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=321, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2023-01-28 06:39:53,320 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 18 predicate places. [2023-01-28 06:39:53,320 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 321 flow [2023-01-28 06:39:53,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.71428571428571) internal successors, (488), 7 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:53,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:53,321 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:39:53,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 06:39:53,321 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:39:53,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:53,322 INFO L85 PathProgramCache]: Analyzing trace with hash 567300941, now seen corresponding path program 1 times [2023-01-28 06:39:53,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:53,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049267028] [2023-01-28 06:39:53,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:53,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:39:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:39:53,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:39:53,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049267028] [2023-01-28 06:39:53,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049267028] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:39:53,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:39:53,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 06:39:53,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225071248] [2023-01-28 06:39:53,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:39:53,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 06:39:53,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:39:53,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 06:39:53,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 06:39:53,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 190 [2023-01-28 06:39:53,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 321 flow. Second operand has 5 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:53,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:39:53,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 190 [2023-01-28 06:39:53,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:39:54,228 INFO L130 PetriNetUnfolder]: 7333/10488 cut-off events. [2023-01-28 06:39:54,228 INFO L131 PetriNetUnfolder]: For 9068/9068 co-relation queries the response was YES. [2023-01-28 06:39:54,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28854 conditions, 10488 events. 7333/10488 cut-off events. For 9068/9068 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 63230 event pairs, 1571 based on Foata normal form. 60/10251 useless extension candidates. Maximal degree in co-relation 28833. Up to 8544 conditions per place. [2023-01-28 06:39:54,278 INFO L137 encePairwiseOnDemand]: 180/190 looper letters, 113 selfloop transitions, 25 changer transitions 0/142 dead transitions. [2023-01-28 06:39:54,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 142 transitions, 897 flow [2023-01-28 06:39:54,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 06:39:54,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 06:39:54,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 594 transitions. [2023-01-28 06:39:54,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44661654135338347 [2023-01-28 06:39:54,280 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 594 transitions. [2023-01-28 06:39:54,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 594 transitions. [2023-01-28 06:39:54,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:39:54,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 594 transitions. [2023-01-28 06:39:54,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 84.85714285714286) internal successors, (594), 7 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:54,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 190.0) internal successors, (1520), 8 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:54,283 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 190.0) internal successors, (1520), 8 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:54,283 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 321 flow. Second operand 7 states and 594 transitions. [2023-01-28 06:39:54,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 142 transitions, 897 flow [2023-01-28 06:39:54,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 142 transitions, 823 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-01-28 06:39:54,303 INFO L231 Difference]: Finished difference. Result has 69 places, 83 transitions, 506 flow [2023-01-28 06:39:54,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=506, PETRI_PLACES=69, PETRI_TRANSITIONS=83} [2023-01-28 06:39:54,304 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 22 predicate places. [2023-01-28 06:39:54,304 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 83 transitions, 506 flow [2023-01-28 06:39:54,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:54,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:54,304 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:39:54,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 06:39:54,305 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:39:54,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:54,305 INFO L85 PathProgramCache]: Analyzing trace with hash -284630156, now seen corresponding path program 1 times [2023-01-28 06:39:54,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:54,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734780307] [2023-01-28 06:39:54,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:54,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:39:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:39:54,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:39:54,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734780307] [2023-01-28 06:39:54,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734780307] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:39:54,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:39:54,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 06:39:54,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064984007] [2023-01-28 06:39:54,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:39:54,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 06:39:54,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:39:54,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 06:39:54,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-01-28 06:39:54,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 190 [2023-01-28 06:39:54,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 83 transitions, 506 flow. Second operand has 7 states, 7 states have (on average 69.85714285714286) internal successors, (489), 7 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:54,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:39:54,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 190 [2023-01-28 06:39:54,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:39:55,485 INFO L130 PetriNetUnfolder]: 8621/12340 cut-off events. [2023-01-28 06:39:55,485 INFO L131 PetriNetUnfolder]: For 17710/17710 co-relation queries the response was YES. [2023-01-28 06:39:55,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36250 conditions, 12340 events. 8621/12340 cut-off events. For 17710/17710 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 76752 event pairs, 1477 based on Foata normal form. 128/12179 useless extension candidates. Maximal degree in co-relation 36225. Up to 8090 conditions per place. [2023-01-28 06:39:55,541 INFO L137 encePairwiseOnDemand]: 179/190 looper letters, 147 selfloop transitions, 36 changer transitions 0/187 dead transitions. [2023-01-28 06:39:55,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 187 transitions, 1256 flow [2023-01-28 06:39:55,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 06:39:55,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 06:39:55,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 758 transitions. [2023-01-28 06:39:55,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4432748538011696 [2023-01-28 06:39:55,543 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 758 transitions. [2023-01-28 06:39:55,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 758 transitions. [2023-01-28 06:39:55,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:39:55,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 758 transitions. [2023-01-28 06:39:55,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 84.22222222222223) internal successors, (758), 9 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:55,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 190.0) internal successors, (1900), 10 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:55,547 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 190.0) internal successors, (1900), 10 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:55,547 INFO L175 Difference]: Start difference. First operand has 69 places, 83 transitions, 506 flow. Second operand 9 states and 758 transitions. [2023-01-28 06:39:55,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 187 transitions, 1256 flow [2023-01-28 06:39:55,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 187 transitions, 1230 flow, removed 13 selfloop flow, removed 0 redundant places. [2023-01-28 06:39:55,617 INFO L231 Difference]: Finished difference. Result has 79 places, 94 transitions, 685 flow [2023-01-28 06:39:55,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=685, PETRI_PLACES=79, PETRI_TRANSITIONS=94} [2023-01-28 06:39:55,619 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 32 predicate places. [2023-01-28 06:39:55,619 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 94 transitions, 685 flow [2023-01-28 06:39:55,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.85714285714286) internal successors, (489), 7 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:55,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:55,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:39:55,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-28 06:39:55,620 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:39:55,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:55,620 INFO L85 PathProgramCache]: Analyzing trace with hash -387139237, now seen corresponding path program 1 times [2023-01-28 06:39:55,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:55,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104360530] [2023-01-28 06:39:55,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:55,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:39:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:39:55,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:39:55,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104360530] [2023-01-28 06:39:55,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104360530] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:39:55,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:39:55,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-01-28 06:39:55,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674858936] [2023-01-28 06:39:55,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:39:55,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 06:39:55,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:39:55,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 06:39:55,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-01-28 06:39:55,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 190 [2023-01-28 06:39:55,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 94 transitions, 685 flow. Second operand has 9 states, 9 states have (on average 68.77777777777777) internal successors, (619), 9 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:55,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:39:55,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 190 [2023-01-28 06:39:55,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:39:57,581 INFO L130 PetriNetUnfolder]: 13040/18605 cut-off events. [2023-01-28 06:39:57,581 INFO L131 PetriNetUnfolder]: For 45914/45914 co-relation queries the response was YES. [2023-01-28 06:39:57,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58296 conditions, 18605 events. 13040/18605 cut-off events. For 45914/45914 co-relation queries the response was YES. Maximal size of possible extension queue 962. Compared 123211 event pairs, 911 based on Foata normal form. 370/18626 useless extension candidates. Maximal degree in co-relation 58267. Up to 7882 conditions per place. [2023-01-28 06:39:57,726 INFO L137 encePairwiseOnDemand]: 176/190 looper letters, 236 selfloop transitions, 103 changer transitions 0/343 dead transitions. [2023-01-28 06:39:57,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 343 transitions, 2640 flow [2023-01-28 06:39:57,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 06:39:57,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 06:39:57,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1265 transitions. [2023-01-28 06:39:57,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.443859649122807 [2023-01-28 06:39:57,729 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1265 transitions. [2023-01-28 06:39:57,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1265 transitions. [2023-01-28 06:39:57,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:39:57,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1265 transitions. [2023-01-28 06:39:57,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 84.33333333333333) internal successors, (1265), 15 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:57,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 190.0) internal successors, (3040), 16 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:57,734 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 190.0) internal successors, (3040), 16 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:57,734 INFO L175 Difference]: Start difference. First operand has 79 places, 94 transitions, 685 flow. Second operand 15 states and 1265 transitions. [2023-01-28 06:39:57,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 343 transitions, 2640 flow [2023-01-28 06:39:58,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 343 transitions, 2398 flow, removed 58 selfloop flow, removed 6 redundant places. [2023-01-28 06:39:58,065 INFO L231 Difference]: Finished difference. Result has 96 places, 161 transitions, 1576 flow [2023-01-28 06:39:58,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1576, PETRI_PLACES=96, PETRI_TRANSITIONS=161} [2023-01-28 06:39:58,066 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 49 predicate places. [2023-01-28 06:39:58,066 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 161 transitions, 1576 flow [2023-01-28 06:39:58,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 68.77777777777777) internal successors, (619), 9 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:58,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:39:58,066 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:39:58,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-28 06:39:58,066 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:39:58,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:39:58,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1562166797, now seen corresponding path program 1 times [2023-01-28 06:39:58,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:39:58,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080025260] [2023-01-28 06:39:58,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:39:58,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:39:58,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:39:58,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:39:58,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:39:58,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080025260] [2023-01-28 06:39:58,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080025260] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:39:58,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:39:58,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 06:39:58,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113268041] [2023-01-28 06:39:58,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:39:58,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 06:39:58,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:39:58,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 06:39:58,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-01-28 06:39:58,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 190 [2023-01-28 06:39:58,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 161 transitions, 1576 flow. Second operand has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:39:58,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:39:58,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 190 [2023-01-28 06:39:58,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:40:00,197 INFO L130 PetriNetUnfolder]: 14134/20159 cut-off events. [2023-01-28 06:40:00,198 INFO L131 PetriNetUnfolder]: For 88180/88180 co-relation queries the response was YES. [2023-01-28 06:40:00,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76097 conditions, 20159 events. 14134/20159 cut-off events. For 88180/88180 co-relation queries the response was YES. Maximal size of possible extension queue 1076. Compared 133333 event pairs, 3021 based on Foata normal form. 48/19858 useless extension candidates. Maximal degree in co-relation 76059. Up to 16211 conditions per place. [2023-01-28 06:40:00,344 INFO L137 encePairwiseOnDemand]: 176/190 looper letters, 242 selfloop transitions, 71 changer transitions 0/317 dead transitions. [2023-01-28 06:40:00,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 317 transitions, 3219 flow [2023-01-28 06:40:00,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 06:40:00,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 06:40:00,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1118 transitions. [2023-01-28 06:40:00,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42030075187969923 [2023-01-28 06:40:00,346 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1118 transitions. [2023-01-28 06:40:00,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1118 transitions. [2023-01-28 06:40:00,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:40:00,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1118 transitions. [2023-01-28 06:40:00,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 79.85714285714286) internal successors, (1118), 14 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:00,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 190.0) internal successors, (2850), 15 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:00,352 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 190.0) internal successors, (2850), 15 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:00,352 INFO L175 Difference]: Start difference. First operand has 96 places, 161 transitions, 1576 flow. Second operand 14 states and 1118 transitions. [2023-01-28 06:40:00,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 317 transitions, 3219 flow [2023-01-28 06:40:00,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 317 transitions, 2955 flow, removed 80 selfloop flow, removed 7 redundant places. [2023-01-28 06:40:00,758 INFO L231 Difference]: Finished difference. Result has 107 places, 200 transitions, 2038 flow [2023-01-28 06:40:00,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=1371, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2038, PETRI_PLACES=107, PETRI_TRANSITIONS=200} [2023-01-28 06:40:00,759 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 60 predicate places. [2023-01-28 06:40:00,759 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 200 transitions, 2038 flow [2023-01-28 06:40:00,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:00,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:40:00,759 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:40:00,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-28 06:40:00,760 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:40:00,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:40:00,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1587879437, now seen corresponding path program 2 times [2023-01-28 06:40:00,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:40:00,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114283851] [2023-01-28 06:40:00,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:40:00,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:40:00,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:40:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:40:00,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:40:00,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114283851] [2023-01-28 06:40:00,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114283851] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:40:00,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:40:00,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 06:40:00,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066229930] [2023-01-28 06:40:00,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:40:00,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 06:40:00,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:40:00,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 06:40:00,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-01-28 06:40:00,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 190 [2023-01-28 06:40:00,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 200 transitions, 2038 flow. Second operand has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:00,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:40:00,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 190 [2023-01-28 06:40:00,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:40:03,166 INFO L130 PetriNetUnfolder]: 15220/21717 cut-off events. [2023-01-28 06:40:03,166 INFO L131 PetriNetUnfolder]: For 111386/111386 co-relation queries the response was YES. [2023-01-28 06:40:03,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84763 conditions, 21717 events. 15220/21717 cut-off events. For 111386/111386 co-relation queries the response was YES. Maximal size of possible extension queue 1191. Compared 146307 event pairs, 3125 based on Foata normal form. 44/21404 useless extension candidates. Maximal degree in co-relation 84719. Up to 17361 conditions per place. [2023-01-28 06:40:03,351 INFO L137 encePairwiseOnDemand]: 176/190 looper letters, 275 selfloop transitions, 81 changer transitions 0/360 dead transitions. [2023-01-28 06:40:03,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 360 transitions, 3781 flow [2023-01-28 06:40:03,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 06:40:03,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 06:40:03,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1115 transitions. [2023-01-28 06:40:03,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4191729323308271 [2023-01-28 06:40:03,358 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1115 transitions. [2023-01-28 06:40:03,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1115 transitions. [2023-01-28 06:40:03,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:40:03,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1115 transitions. [2023-01-28 06:40:03,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 79.64285714285714) internal successors, (1115), 14 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:03,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 190.0) internal successors, (2850), 15 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:03,365 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 190.0) internal successors, (2850), 15 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:03,366 INFO L175 Difference]: Start difference. First operand has 107 places, 200 transitions, 2038 flow. Second operand 14 states and 1115 transitions. [2023-01-28 06:40:03,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 360 transitions, 3781 flow [2023-01-28 06:40:04,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 360 transitions, 3544 flow, removed 97 selfloop flow, removed 5 redundant places. [2023-01-28 06:40:04,139 INFO L231 Difference]: Finished difference. Result has 120 places, 234 transitions, 2447 flow [2023-01-28 06:40:04,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=1806, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2447, PETRI_PLACES=120, PETRI_TRANSITIONS=234} [2023-01-28 06:40:04,141 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 73 predicate places. [2023-01-28 06:40:04,141 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 234 transitions, 2447 flow [2023-01-28 06:40:04,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:04,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:40:04,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:40:04,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-01-28 06:40:04,141 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:40:04,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:40:04,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1621313785, now seen corresponding path program 1 times [2023-01-28 06:40:04,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:40:04,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266251249] [2023-01-28 06:40:04,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:40:04,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:40:04,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:40:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:40:04,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:40:04,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266251249] [2023-01-28 06:40:04,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266251249] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:40:04,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:40:04,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-28 06:40:04,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853543118] [2023-01-28 06:40:04,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:40:04,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 06:40:04,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:40:04,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 06:40:04,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-01-28 06:40:04,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 190 [2023-01-28 06:40:04,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 234 transitions, 2447 flow. Second operand has 10 states, 10 states have (on average 67.8) internal successors, (678), 10 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:04,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:40:04,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 190 [2023-01-28 06:40:04,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:40:07,068 INFO L130 PetriNetUnfolder]: 16599/23738 cut-off events. [2023-01-28 06:40:07,068 INFO L131 PetriNetUnfolder]: For 159596/159596 co-relation queries the response was YES. [2023-01-28 06:40:07,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96288 conditions, 23738 events. 16599/23738 cut-off events. For 159596/159596 co-relation queries the response was YES. Maximal size of possible extension queue 1253. Compared 162747 event pairs, 1269 based on Foata normal form. 76/23469 useless extension candidates. Maximal degree in co-relation 96239. Up to 9415 conditions per place. [2023-01-28 06:40:07,312 INFO L137 encePairwiseOnDemand]: 175/190 looper letters, 301 selfloop transitions, 179 changer transitions 10/494 dead transitions. [2023-01-28 06:40:07,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 494 transitions, 5106 flow [2023-01-28 06:40:07,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 06:40:07,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 06:40:07,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1409 transitions. [2023-01-28 06:40:07,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4362229102167183 [2023-01-28 06:40:07,318 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1409 transitions. [2023-01-28 06:40:07,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1409 transitions. [2023-01-28 06:40:07,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:40:07,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1409 transitions. [2023-01-28 06:40:07,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 82.88235294117646) internal successors, (1409), 17 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:07,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 190.0) internal successors, (3420), 18 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:07,329 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 190.0) internal successors, (3420), 18 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:07,329 INFO L175 Difference]: Start difference. First operand has 120 places, 234 transitions, 2447 flow. Second operand 17 states and 1409 transitions. [2023-01-28 06:40:07,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 494 transitions, 5106 flow [2023-01-28 06:40:08,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 494 transitions, 4782 flow, removed 99 selfloop flow, removed 6 redundant places. [2023-01-28 06:40:08,267 INFO L231 Difference]: Finished difference. Result has 133 places, 269 transitions, 3103 flow [2023-01-28 06:40:08,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=2180, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3103, PETRI_PLACES=133, PETRI_TRANSITIONS=269} [2023-01-28 06:40:08,267 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 86 predicate places. [2023-01-28 06:40:08,268 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 269 transitions, 3103 flow [2023-01-28 06:40:08,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 67.8) internal successors, (678), 10 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:08,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:40:08,268 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:40:08,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-01-28 06:40:08,268 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:40:08,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:40:08,269 INFO L85 PathProgramCache]: Analyzing trace with hash 2072422931, now seen corresponding path program 1 times [2023-01-28 06:40:08,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:40:08,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129842200] [2023-01-28 06:40:08,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:40:08,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:40:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:40:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:40:08,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:40:08,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129842200] [2023-01-28 06:40:08,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129842200] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:40:08,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:40:08,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-28 06:40:08,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126022037] [2023-01-28 06:40:08,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:40:08,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 06:40:08,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:40:08,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 06:40:08,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-01-28 06:40:08,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 190 [2023-01-28 06:40:08,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 269 transitions, 3103 flow. Second operand has 8 states, 8 states have (on average 68.0) internal successors, (544), 8 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:08,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:40:08,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 190 [2023-01-28 06:40:08,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:40:11,660 INFO L130 PetriNetUnfolder]: 19154/27435 cut-off events. [2023-01-28 06:40:11,660 INFO L131 PetriNetUnfolder]: For 226506/226506 co-relation queries the response was YES. [2023-01-28 06:40:11,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118493 conditions, 27435 events. 19154/27435 cut-off events. For 226506/226506 co-relation queries the response was YES. Maximal size of possible extension queue 1518. Compared 192193 event pairs, 2719 based on Foata normal form. 136/27370 useless extension candidates. Maximal degree in co-relation 118441. Up to 15474 conditions per place. [2023-01-28 06:40:12,084 INFO L137 encePairwiseOnDemand]: 176/190 looper letters, 293 selfloop transitions, 197 changer transitions 0/494 dead transitions. [2023-01-28 06:40:12,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 494 transitions, 5935 flow [2023-01-28 06:40:12,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 06:40:12,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 06:40:12,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1345 transitions. [2023-01-28 06:40:12,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41640866873065013 [2023-01-28 06:40:12,087 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1345 transitions. [2023-01-28 06:40:12,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1345 transitions. [2023-01-28 06:40:12,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:40:12,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1345 transitions. [2023-01-28 06:40:12,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 79.11764705882354) internal successors, (1345), 17 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:12,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 190.0) internal successors, (3420), 18 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:12,092 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 190.0) internal successors, (3420), 18 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:12,093 INFO L175 Difference]: Start difference. First operand has 133 places, 269 transitions, 3103 flow. Second operand 17 states and 1345 transitions. [2023-01-28 06:40:12,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 494 transitions, 5935 flow [2023-01-28 06:40:13,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 494 transitions, 5670 flow, removed 49 selfloop flow, removed 11 redundant places. [2023-01-28 06:40:13,665 INFO L231 Difference]: Finished difference. Result has 144 places, 334 transitions, 4474 flow [2023-01-28 06:40:13,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=2873, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4474, PETRI_PLACES=144, PETRI_TRANSITIONS=334} [2023-01-28 06:40:13,665 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 97 predicate places. [2023-01-28 06:40:13,665 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 334 transitions, 4474 flow [2023-01-28 06:40:13,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 68.0) internal successors, (544), 8 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:13,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:40:13,666 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:40:13,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-01-28 06:40:13,666 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:40:13,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:40:13,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1996273818, now seen corresponding path program 1 times [2023-01-28 06:40:13,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:40:13,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743385536] [2023-01-28 06:40:13,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:40:13,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:40:13,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:40:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:40:13,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:40:13,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743385536] [2023-01-28 06:40:13,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743385536] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:40:13,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:40:13,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-28 06:40:13,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943124257] [2023-01-28 06:40:13,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:40:13,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 06:40:13,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:40:13,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 06:40:13,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-01-28 06:40:13,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 190 [2023-01-28 06:40:13,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 334 transitions, 4474 flow. Second operand has 8 states, 8 states have (on average 68.0) internal successors, (544), 8 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:13,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:40:13,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 190 [2023-01-28 06:40:13,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:40:17,974 INFO L130 PetriNetUnfolder]: 21335/30526 cut-off events. [2023-01-28 06:40:17,975 INFO L131 PetriNetUnfolder]: For 320982/320982 co-relation queries the response was YES. [2023-01-28 06:40:18,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143098 conditions, 30526 events. 21335/30526 cut-off events. For 320982/320982 co-relation queries the response was YES. Maximal size of possible extension queue 1693. Compared 216239 event pairs, 4345 based on Foata normal form. 112/30437 useless extension candidates. Maximal degree in co-relation 143039. Up to 23552 conditions per place. [2023-01-28 06:40:18,328 INFO L137 encePairwiseOnDemand]: 176/190 looper letters, 387 selfloop transitions, 121 changer transitions 0/512 dead transitions. [2023-01-28 06:40:18,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 512 transitions, 7061 flow [2023-01-28 06:40:18,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 06:40:18,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 06:40:18,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1183 transitions. [2023-01-28 06:40:18,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4150877192982456 [2023-01-28 06:40:18,334 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1183 transitions. [2023-01-28 06:40:18,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1183 transitions. [2023-01-28 06:40:18,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:40:18,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1183 transitions. [2023-01-28 06:40:18,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 78.86666666666666) internal successors, (1183), 15 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:18,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 190.0) internal successors, (3040), 16 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:18,339 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 190.0) internal successors, (3040), 16 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:18,339 INFO L175 Difference]: Start difference. First operand has 144 places, 334 transitions, 4474 flow. Second operand 15 states and 1183 transitions. [2023-01-28 06:40:18,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 512 transitions, 7061 flow [2023-01-28 06:40:20,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 512 transitions, 6693 flow, removed 175 selfloop flow, removed 4 redundant places. [2023-01-28 06:40:20,511 INFO L231 Difference]: Finished difference. Result has 157 places, 366 transitions, 5135 flow [2023-01-28 06:40:20,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=4184, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5135, PETRI_PLACES=157, PETRI_TRANSITIONS=366} [2023-01-28 06:40:20,512 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 110 predicate places. [2023-01-28 06:40:20,512 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 366 transitions, 5135 flow [2023-01-28 06:40:20,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 68.0) internal successors, (544), 8 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:20,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:40:20,513 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:40:20,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-01-28 06:40:20,513 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:40:20,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:40:20,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1196385468, now seen corresponding path program 2 times [2023-01-28 06:40:20,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:40:20,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300322254] [2023-01-28 06:40:20,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:40:20,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:40:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:40:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:40:20,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:40:20,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300322254] [2023-01-28 06:40:20,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300322254] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:40:20,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:40:20,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 06:40:20,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690485618] [2023-01-28 06:40:20,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:40:20,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 06:40:20,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:40:20,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 06:40:20,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-01-28 06:40:20,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 190 [2023-01-28 06:40:20,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 366 transitions, 5135 flow. Second operand has 7 states, 7 states have (on average 69.28571428571429) internal successors, (485), 7 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:20,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:40:20,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 190 [2023-01-28 06:40:20,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:40:24,912 INFO L130 PetriNetUnfolder]: 22907/32742 cut-off events. [2023-01-28 06:40:24,913 INFO L131 PetriNetUnfolder]: For 364250/364250 co-relation queries the response was YES. [2023-01-28 06:40:25,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154801 conditions, 32742 events. 22907/32742 cut-off events. For 364250/364250 co-relation queries the response was YES. Maximal size of possible extension queue 1823. Compared 233521 event pairs, 5217 based on Foata normal form. 104/32645 useless extension candidates. Maximal degree in co-relation 154739. Up to 28226 conditions per place. [2023-01-28 06:40:25,217 INFO L137 encePairwiseOnDemand]: 177/190 looper letters, 406 selfloop transitions, 76 changer transitions 0/486 dead transitions. [2023-01-28 06:40:25,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 486 transitions, 7076 flow [2023-01-28 06:40:25,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 06:40:25,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 06:40:25,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 962 transitions. [2023-01-28 06:40:25,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219298245614035 [2023-01-28 06:40:25,219 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 962 transitions. [2023-01-28 06:40:25,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 962 transitions. [2023-01-28 06:40:25,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:40:25,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 962 transitions. [2023-01-28 06:40:25,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 80.16666666666667) internal successors, (962), 12 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:25,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 190.0) internal successors, (2470), 13 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:25,224 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 190.0) internal successors, (2470), 13 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:25,224 INFO L175 Difference]: Start difference. First operand has 157 places, 366 transitions, 5135 flow. Second operand 12 states and 962 transitions. [2023-01-28 06:40:25,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 486 transitions, 7076 flow [2023-01-28 06:40:27,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 486 transitions, 6719 flow, removed 100 selfloop flow, removed 11 redundant places. [2023-01-28 06:40:27,990 INFO L231 Difference]: Finished difference. Result has 160 places, 393 transitions, 5544 flow [2023-01-28 06:40:27,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=4783, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5544, PETRI_PLACES=160, PETRI_TRANSITIONS=393} [2023-01-28 06:40:27,991 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 113 predicate places. [2023-01-28 06:40:27,991 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 393 transitions, 5544 flow [2023-01-28 06:40:27,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.28571428571429) internal successors, (485), 7 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:27,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:40:27,992 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:40:27,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-01-28 06:40:27,992 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:40:27,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:40:27,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1181835622, now seen corresponding path program 3 times [2023-01-28 06:40:27,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:40:27,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951238738] [2023-01-28 06:40:27,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:40:27,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:40:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:40:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:40:28,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:40:28,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951238738] [2023-01-28 06:40:28,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951238738] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:40:28,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:40:28,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-28 06:40:28,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012129980] [2023-01-28 06:40:28,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:40:28,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 06:40:28,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:40:28,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 06:40:28,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-01-28 06:40:28,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 190 [2023-01-28 06:40:28,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 393 transitions, 5544 flow. Second operand has 8 states, 8 states have (on average 68.0) internal successors, (544), 8 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:28,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:40:28,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 190 [2023-01-28 06:40:28,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:40:33,241 INFO L130 PetriNetUnfolder]: 25186/36027 cut-off events. [2023-01-28 06:40:33,241 INFO L131 PetriNetUnfolder]: For 433298/433298 co-relation queries the response was YES. [2023-01-28 06:40:33,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170752 conditions, 36027 events. 25186/36027 cut-off events. For 433298/433298 co-relation queries the response was YES. Maximal size of possible extension queue 2074. Compared 262875 event pairs, 4673 based on Foata normal form. 120/35946 useless extension candidates. Maximal degree in co-relation 170687. Up to 20486 conditions per place. [2023-01-28 06:40:33,694 INFO L137 encePairwiseOnDemand]: 176/190 looper letters, 383 selfloop transitions, 224 changer transitions 0/611 dead transitions. [2023-01-28 06:40:33,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 611 transitions, 8709 flow [2023-01-28 06:40:33,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 06:40:33,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 06:40:33,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1345 transitions. [2023-01-28 06:40:33,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41640866873065013 [2023-01-28 06:40:33,697 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1345 transitions. [2023-01-28 06:40:33,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1345 transitions. [2023-01-28 06:40:33,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:40:33,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1345 transitions. [2023-01-28 06:40:33,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 79.11764705882354) internal successors, (1345), 17 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:33,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 190.0) internal successors, (3420), 18 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:33,703 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 190.0) internal successors, (3420), 18 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:33,704 INFO L175 Difference]: Start difference. First operand has 160 places, 393 transitions, 5544 flow. Second operand 17 states and 1345 transitions. [2023-01-28 06:40:33,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 611 transitions, 8709 flow [2023-01-28 06:40:36,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 611 transitions, 8444 flow, removed 128 selfloop flow, removed 2 redundant places. [2023-01-28 06:40:36,642 INFO L231 Difference]: Finished difference. Result has 180 places, 436 transitions, 6842 flow [2023-01-28 06:40:36,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=5279, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6842, PETRI_PLACES=180, PETRI_TRANSITIONS=436} [2023-01-28 06:40:36,643 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 133 predicate places. [2023-01-28 06:40:36,643 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 436 transitions, 6842 flow [2023-01-28 06:40:36,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 68.0) internal successors, (544), 8 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:36,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:40:36,644 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:40:36,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-01-28 06:40:36,644 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:40:36,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:40:36,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1238743469, now seen corresponding path program 2 times [2023-01-28 06:40:36,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:40:36,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266513775] [2023-01-28 06:40:36,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:40:36,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:40:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:40:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:40:36,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:40:36,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266513775] [2023-01-28 06:40:36,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266513775] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:40:36,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:40:36,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-28 06:40:36,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646452123] [2023-01-28 06:40:36,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:40:36,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 06:40:36,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:40:36,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 06:40:36,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-01-28 06:40:36,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 190 [2023-01-28 06:40:36,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 436 transitions, 6842 flow. Second operand has 8 states, 8 states have (on average 68.0) internal successors, (544), 8 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:36,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:40:36,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 190 [2023-01-28 06:40:36,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:40:42,701 INFO L130 PetriNetUnfolder]: 26538/37951 cut-off events. [2023-01-28 06:40:42,701 INFO L131 PetriNetUnfolder]: For 507824/507824 co-relation queries the response was YES. [2023-01-28 06:40:42,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188017 conditions, 37951 events. 26538/37951 cut-off events. For 507824/507824 co-relation queries the response was YES. Maximal size of possible extension queue 2187. Compared 278589 event pairs, 5915 based on Foata normal form. 96/37842 useless extension candidates. Maximal degree in co-relation 187945. Up to 30898 conditions per place. [2023-01-28 06:40:43,146 INFO L137 encePairwiseOnDemand]: 176/190 looper letters, 474 selfloop transitions, 122 changer transitions 0/600 dead transitions. [2023-01-28 06:40:43,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 600 transitions, 9542 flow [2023-01-28 06:40:43,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 06:40:43,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 06:40:43,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1183 transitions. [2023-01-28 06:40:43,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4150877192982456 [2023-01-28 06:40:43,149 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1183 transitions. [2023-01-28 06:40:43,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1183 transitions. [2023-01-28 06:40:43,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:40:43,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1183 transitions. [2023-01-28 06:40:43,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 78.86666666666666) internal successors, (1183), 15 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:43,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 190.0) internal successors, (3040), 16 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:43,158 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 190.0) internal successors, (3040), 16 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:43,158 INFO L175 Difference]: Start difference. First operand has 180 places, 436 transitions, 6842 flow. Second operand 15 states and 1183 transitions. [2023-01-28 06:40:43,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 600 transitions, 9542 flow [2023-01-28 06:40:48,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 600 transitions, 9118 flow, removed 203 selfloop flow, removed 5 redundant places. [2023-01-28 06:40:48,089 INFO L231 Difference]: Finished difference. Result has 192 places, 455 transitions, 7309 flow [2023-01-28 06:40:48,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=6496, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7309, PETRI_PLACES=192, PETRI_TRANSITIONS=455} [2023-01-28 06:40:48,090 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 145 predicate places. [2023-01-28 06:40:48,090 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 455 transitions, 7309 flow [2023-01-28 06:40:48,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 68.0) internal successors, (544), 8 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:48,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:40:48,090 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:40:48,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-01-28 06:40:48,091 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:40:48,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:40:48,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1403233678, now seen corresponding path program 1 times [2023-01-28 06:40:48,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:40:48,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292697332] [2023-01-28 06:40:48,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:40:48,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:40:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:40:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:40:48,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:40:48,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292697332] [2023-01-28 06:40:48,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292697332] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:40:48,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:40:48,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-01-28 06:40:48,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600644058] [2023-01-28 06:40:48,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:40:48,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 06:40:48,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:40:48,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 06:40:48,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-01-28 06:40:48,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 190 [2023-01-28 06:40:48,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 455 transitions, 7309 flow. Second operand has 9 states, 9 states have (on average 68.88888888888889) internal successors, (620), 9 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:48,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:40:48,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 190 [2023-01-28 06:40:48,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:40:55,186 INFO L130 PetriNetUnfolder]: 31439/44878 cut-off events. [2023-01-28 06:40:55,186 INFO L131 PetriNetUnfolder]: For 594952/594952 co-relation queries the response was YES. [2023-01-28 06:40:55,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224518 conditions, 44878 events. 31439/44878 cut-off events. For 594952/594952 co-relation queries the response was YES. Maximal size of possible extension queue 2575. Compared 336599 event pairs, 2779 based on Foata normal form. 92/44769 useless extension candidates. Maximal degree in co-relation 224443. Up to 21228 conditions per place. [2023-01-28 06:40:55,725 INFO L137 encePairwiseOnDemand]: 175/190 looper letters, 476 selfloop transitions, 401 changer transitions 0/881 dead transitions. [2023-01-28 06:40:55,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 881 transitions, 14149 flow [2023-01-28 06:40:55,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 06:40:55,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 06:40:55,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1261 transitions. [2023-01-28 06:40:55,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4424561403508772 [2023-01-28 06:40:55,727 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1261 transitions. [2023-01-28 06:40:55,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1261 transitions. [2023-01-28 06:40:55,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:40:55,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1261 transitions. [2023-01-28 06:40:55,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 84.06666666666666) internal successors, (1261), 15 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:55,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 190.0) internal successors, (3040), 16 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:55,730 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 190.0) internal successors, (3040), 16 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:40:55,730 INFO L175 Difference]: Start difference. First operand has 192 places, 455 transitions, 7309 flow. Second operand 15 states and 1261 transitions. [2023-01-28 06:40:55,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 881 transitions, 14149 flow [2023-01-28 06:41:01,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 881 transitions, 13638 flow, removed 147 selfloop flow, removed 11 redundant places. [2023-01-28 06:41:01,163 INFO L231 Difference]: Finished difference. Result has 204 places, 634 transitions, 11764 flow [2023-01-28 06:41:01,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=6987, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=11764, PETRI_PLACES=204, PETRI_TRANSITIONS=634} [2023-01-28 06:41:01,164 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 157 predicate places. [2023-01-28 06:41:01,164 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 634 transitions, 11764 flow [2023-01-28 06:41:01,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 68.88888888888889) internal successors, (620), 9 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:41:01,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:41:01,164 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:41:01,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-01-28 06:41:01,164 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:41:01,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:41:01,164 INFO L85 PathProgramCache]: Analyzing trace with hash 396651458, now seen corresponding path program 1 times [2023-01-28 06:41:01,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:41:01,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124756924] [2023-01-28 06:41:01,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:41:01,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:41:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:41:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:41:01,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:41:01,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124756924] [2023-01-28 06:41:01,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124756924] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:41:01,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574661312] [2023-01-28 06:41:01,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:41:01,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:41:01,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:41:01,255 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 06:41:01,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 06:41:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:41:01,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 06:41:01,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:41:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:41:01,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:41:01,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:41:01,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574661312] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:41:01,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:41:01,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2023-01-28 06:41:01,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824447748] [2023-01-28 06:41:01,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:41:01,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 06:41:01,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:41:01,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 06:41:01,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-01-28 06:41:01,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 190 [2023-01-28 06:41:01,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 634 transitions, 11764 flow. Second operand has 15 states, 15 states have (on average 68.13333333333334) internal successors, (1022), 15 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:41:01,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:41:01,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 190 [2023-01-28 06:41:01,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:41:11,600 INFO L130 PetriNetUnfolder]: 36027/51498 cut-off events. [2023-01-28 06:41:11,600 INFO L131 PetriNetUnfolder]: For 1002994/1002994 co-relation queries the response was YES. [2023-01-28 06:41:12,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289651 conditions, 51498 events. 36027/51498 cut-off events. For 1002994/1002994 co-relation queries the response was YES. Maximal size of possible extension queue 3077. Compared 391422 event pairs, 4565 based on Foata normal form. 292/51593 useless extension candidates. Maximal degree in co-relation 289567. Up to 17042 conditions per place. [2023-01-28 06:41:12,333 INFO L137 encePairwiseOnDemand]: 175/190 looper letters, 528 selfloop transitions, 688 changer transitions 0/1220 dead transitions. [2023-01-28 06:41:12,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 1220 transitions, 21167 flow [2023-01-28 06:41:12,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-01-28 06:41:12,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-01-28 06:41:12,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3478 transitions. [2023-01-28 06:41:12,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39794050343249426 [2023-01-28 06:41:12,342 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3478 transitions. [2023-01-28 06:41:12,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3478 transitions. [2023-01-28 06:41:12,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:41:12,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3478 transitions. [2023-01-28 06:41:12,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 75.6086956521739) internal successors, (3478), 46 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:41:12,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 190.0) internal successors, (8930), 47 states have internal predecessors, (8930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:41:12,379 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 190.0) internal successors, (8930), 47 states have internal predecessors, (8930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:41:12,379 INFO L175 Difference]: Start difference. First operand has 204 places, 634 transitions, 11764 flow. Second operand 46 states and 3478 transitions. [2023-01-28 06:41:12,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 1220 transitions, 21167 flow [2023-01-28 06:41:22,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 1220 transitions, 20281 flow, removed 340 selfloop flow, removed 6 redundant places. [2023-01-28 06:41:22,904 INFO L231 Difference]: Finished difference. Result has 259 places, 797 transitions, 16698 flow [2023-01-28 06:41:22,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=11137, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=542, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=16698, PETRI_PLACES=259, PETRI_TRANSITIONS=797} [2023-01-28 06:41:22,905 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 212 predicate places. [2023-01-28 06:41:22,905 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 797 transitions, 16698 flow [2023-01-28 06:41:22,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 68.13333333333334) internal successors, (1022), 15 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:41:22,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:41:22,905 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:41:22,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-28 06:41:23,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-01-28 06:41:23,110 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:41:23,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:41:23,111 INFO L85 PathProgramCache]: Analyzing trace with hash 112198516, now seen corresponding path program 1 times [2023-01-28 06:41:23,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:41:23,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762963876] [2023-01-28 06:41:23,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:41:23,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:41:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:41:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:41:23,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:41:23,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762963876] [2023-01-28 06:41:23,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762963876] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:41:23,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:41:23,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-28 06:41:23,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292580475] [2023-01-28 06:41:23,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:41:23,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 06:41:23,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:41:23,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 06:41:23,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-01-28 06:41:23,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 190 [2023-01-28 06:41:23,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 797 transitions, 16698 flow. Second operand has 10 states, 10 states have (on average 67.9) internal successors, (679), 10 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:41:23,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:41:23,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 190 [2023-01-28 06:41:23,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:41:36,632 INFO L130 PetriNetUnfolder]: 39786/56927 cut-off events. [2023-01-28 06:41:36,632 INFO L131 PetriNetUnfolder]: For 1304390/1304390 co-relation queries the response was YES. [2023-01-28 06:41:37,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350368 conditions, 56927 events. 39786/56927 cut-off events. For 1304390/1304390 co-relation queries the response was YES. Maximal size of possible extension queue 3392. Compared 439689 event pairs, 3325 based on Foata normal form. 112/56842 useless extension candidates. Maximal degree in co-relation 350267. Up to 24810 conditions per place. [2023-01-28 06:41:37,740 INFO L137 encePairwiseOnDemand]: 174/190 looper letters, 613 selfloop transitions, 581 changer transitions 66/1264 dead transitions. [2023-01-28 06:41:37,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 1264 transitions, 26017 flow [2023-01-28 06:41:37,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 06:41:37,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 06:41:37,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1489 transitions. [2023-01-28 06:41:37,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353801169590643 [2023-01-28 06:41:37,744 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1489 transitions. [2023-01-28 06:41:37,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1489 transitions. [2023-01-28 06:41:37,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:41:37,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1489 transitions. [2023-01-28 06:41:37,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 82.72222222222223) internal successors, (1489), 18 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:41:37,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 190.0) internal successors, (3610), 19 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:41:37,753 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 190.0) internal successors, (3610), 19 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:41:37,753 INFO L175 Difference]: Start difference. First operand has 259 places, 797 transitions, 16698 flow. Second operand 18 states and 1489 transitions. [2023-01-28 06:41:37,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 1264 transitions, 26017 flow [2023-01-28 06:41:56,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 1264 transitions, 23112 flow, removed 1241 selfloop flow, removed 13 redundant places. [2023-01-28 06:41:56,501 INFO L231 Difference]: Finished difference. Result has 268 places, 883 transitions, 18368 flow [2023-01-28 06:41:56,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=14736, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=485, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=18368, PETRI_PLACES=268, PETRI_TRANSITIONS=883} [2023-01-28 06:41:56,503 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 221 predicate places. [2023-01-28 06:41:56,503 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 883 transitions, 18368 flow [2023-01-28 06:41:56,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 67.9) internal successors, (679), 10 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:41:56,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:41:56,504 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:41:56,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-01-28 06:41:56,504 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:41:56,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:41:56,504 INFO L85 PathProgramCache]: Analyzing trace with hash -950254716, now seen corresponding path program 1 times [2023-01-28 06:41:56,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:41:56,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752881591] [2023-01-28 06:41:56,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:41:56,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:41:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:41:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:41:56,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:41:56,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752881591] [2023-01-28 06:41:56,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752881591] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:41:56,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908274571] [2023-01-28 06:41:56,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:41:56,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:41:56,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:41:56,614 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 06:41:56,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 06:41:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:41:56,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 06:41:56,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:41:56,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:41:56,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:41:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:41:56,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908274571] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:41:56,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:41:56,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-01-28 06:41:56,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078775061] [2023-01-28 06:41:56,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:41:56,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 06:41:56,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:41:56,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 06:41:56,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-01-28 06:41:56,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 190 [2023-01-28 06:41:56,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 883 transitions, 18368 flow. Second operand has 16 states, 16 states have (on average 68.1875) internal successors, (1091), 16 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:41:56,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:41:56,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 190 [2023-01-28 06:41:56,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:42:14,112 INFO L130 PetriNetUnfolder]: 44581/63900 cut-off events. [2023-01-28 06:42:14,112 INFO L131 PetriNetUnfolder]: For 1542620/1542620 co-relation queries the response was YES. [2023-01-28 06:42:14,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399838 conditions, 63900 events. 44581/63900 cut-off events. For 1542620/1542620 co-relation queries the response was YES. Maximal size of possible extension queue 3886. Compared 500406 event pairs, 3141 based on Foata normal form. 104/63990 useless extension candidates. Maximal degree in co-relation 399731. Up to 20338 conditions per place. [2023-01-28 06:42:15,217 INFO L137 encePairwiseOnDemand]: 174/190 looper letters, 701 selfloop transitions, 978 changer transitions 1/1684 dead transitions. [2023-01-28 06:42:15,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 1684 transitions, 33804 flow [2023-01-28 06:42:15,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-01-28 06:42:15,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-01-28 06:42:15,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3442 transitions. [2023-01-28 06:42:15,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025730994152047 [2023-01-28 06:42:15,244 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3442 transitions. [2023-01-28 06:42:15,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3442 transitions. [2023-01-28 06:42:15,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:42:15,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3442 transitions. [2023-01-28 06:42:15,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 76.4888888888889) internal successors, (3442), 45 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:42:15,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 190.0) internal successors, (8740), 46 states have internal predecessors, (8740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:42:15,253 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 190.0) internal successors, (8740), 46 states have internal predecessors, (8740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:42:15,253 INFO L175 Difference]: Start difference. First operand has 268 places, 883 transitions, 18368 flow. Second operand 45 states and 3442 transitions. [2023-01-28 06:42:15,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 1684 transitions, 33804 flow [2023-01-28 06:42:33,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 1684 transitions, 32625 flow, removed 322 selfloop flow, removed 10 redundant places. [2023-01-28 06:42:33,029 INFO L231 Difference]: Finished difference. Result has 320 places, 1188 transitions, 27918 flow [2023-01-28 06:42:33,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=17706, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=883, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=709, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=27918, PETRI_PLACES=320, PETRI_TRANSITIONS=1188} [2023-01-28 06:42:33,030 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 273 predicate places. [2023-01-28 06:42:33,030 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 1188 transitions, 27918 flow [2023-01-28 06:42:33,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 68.1875) internal successors, (1091), 16 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:42:33,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:42:33,030 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:42:33,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-28 06:42:33,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-01-28 06:42:33,235 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:42:33,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:42:33,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1303559548, now seen corresponding path program 2 times [2023-01-28 06:42:33,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:42:33,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922717928] [2023-01-28 06:42:33,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:42:33,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:42:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:42:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:42:33,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:42:33,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922717928] [2023-01-28 06:42:33,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922717928] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:42:33,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:42:33,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-28 06:42:33,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014498134] [2023-01-28 06:42:33,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:42:33,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 06:42:33,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:42:33,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 06:42:33,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-01-28 06:42:33,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 190 [2023-01-28 06:42:33,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 1188 transitions, 27918 flow. Second operand has 10 states, 10 states have (on average 67.0) internal successors, (670), 10 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:42:33,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:42:33,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 190 [2023-01-28 06:42:33,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:42:56,013 INFO L130 PetriNetUnfolder]: 47802/68495 cut-off events. [2023-01-28 06:42:56,014 INFO L131 PetriNetUnfolder]: For 1977436/1977436 co-relation queries the response was YES. [2023-01-28 06:42:57,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464659 conditions, 68495 events. 47802/68495 cut-off events. For 1977436/1977436 co-relation queries the response was YES. Maximal size of possible extension queue 4118. Compared 541360 event pairs, 9669 based on Foata normal form. 56/68537 useless extension candidates. Maximal degree in co-relation 464533. Up to 58226 conditions per place. [2023-01-28 06:42:57,457 INFO L137 encePairwiseOnDemand]: 175/190 looper letters, 1280 selfloop transitions, 241 changer transitions 0/1525 dead transitions. [2023-01-28 06:42:57,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 1525 transitions, 36290 flow [2023-01-28 06:42:57,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 06:42:57,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 06:42:57,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1827 transitions. [2023-01-28 06:42:57,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4006578947368421 [2023-01-28 06:42:57,459 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1827 transitions. [2023-01-28 06:42:57,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1827 transitions. [2023-01-28 06:42:57,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:42:57,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1827 transitions. [2023-01-28 06:42:57,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 76.125) internal successors, (1827), 24 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:42:57,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 190.0) internal successors, (4750), 25 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:42:57,464 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 190.0) internal successors, (4750), 25 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:42:57,464 INFO L175 Difference]: Start difference. First operand has 320 places, 1188 transitions, 27918 flow. Second operand 24 states and 1827 transitions. [2023-01-28 06:42:57,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 1525 transitions, 36290 flow [2023-01-28 06:43:35,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 1525 transitions, 34862 flow, removed 657 selfloop flow, removed 10 redundant places. [2023-01-28 06:43:35,669 INFO L231 Difference]: Finished difference. Result has 343 places, 1273 transitions, 29647 flow [2023-01-28 06:43:35,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=26746, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=951, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=29647, PETRI_PLACES=343, PETRI_TRANSITIONS=1273} [2023-01-28 06:43:35,670 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 296 predicate places. [2023-01-28 06:43:35,670 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 1273 transitions, 29647 flow [2023-01-28 06:43:35,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 67.0) internal successors, (670), 10 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:43:35,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:43:35,671 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:43:35,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-01-28 06:43:35,671 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:43:35,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:43:35,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1099617128, now seen corresponding path program 1 times [2023-01-28 06:43:35,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:43:35,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668859715] [2023-01-28 06:43:35,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:43:35,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:43:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:43:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:43:35,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:43:35,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668859715] [2023-01-28 06:43:35,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668859715] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:43:35,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:43:35,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-28 06:43:35,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686508849] [2023-01-28 06:43:35,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:43:35,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 06:43:35,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:43:35,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 06:43:35,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-01-28 06:43:35,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 190 [2023-01-28 06:43:35,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 1273 transitions, 29647 flow. Second operand has 10 states, 10 states have (on average 67.0) internal successors, (670), 10 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:43:35,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:43:35,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 190 [2023-01-28 06:43:35,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:43:58,185 INFO L130 PetriNetUnfolder]: 50688/72581 cut-off events. [2023-01-28 06:43:58,185 INFO L131 PetriNetUnfolder]: For 2098204/2098204 co-relation queries the response was YES. [2023-01-28 06:43:59,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491313 conditions, 72581 events. 50688/72581 cut-off events. For 2098204/2098204 co-relation queries the response was YES. Maximal size of possible extension queue 4362. Compared 575199 event pairs, 9897 based on Foata normal form. 72/72639 useless extension candidates. Maximal degree in co-relation 491177. Up to 60287 conditions per place. [2023-01-28 06:44:00,091 INFO L137 encePairwiseOnDemand]: 174/190 looper letters, 1346 selfloop transitions, 327 changer transitions 0/1677 dead transitions. [2023-01-28 06:44:00,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1677 transitions, 40284 flow [2023-01-28 06:44:00,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 06:44:00,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 06:44:00,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1692 transitions. [2023-01-28 06:44:00,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4047846889952153 [2023-01-28 06:44:00,094 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1692 transitions. [2023-01-28 06:44:00,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1692 transitions. [2023-01-28 06:44:00,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:44:00,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1692 transitions. [2023-01-28 06:44:00,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 76.9090909090909) internal successors, (1692), 22 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:44:00,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 190.0) internal successors, (4370), 23 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:44:00,098 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 190.0) internal successors, (4370), 23 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:44:00,098 INFO L175 Difference]: Start difference. First operand has 343 places, 1273 transitions, 29647 flow. Second operand 22 states and 1692 transitions. [2023-01-28 06:44:00,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1677 transitions, 40284 flow [2023-01-28 06:44:35,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 1677 transitions, 39578 flow, removed 212 selfloop flow, removed 10 redundant places. [2023-01-28 06:44:35,226 INFO L231 Difference]: Finished difference. Result has 361 places, 1404 transitions, 33609 flow [2023-01-28 06:44:35,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=29107, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1004, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=33609, PETRI_PLACES=361, PETRI_TRANSITIONS=1404} [2023-01-28 06:44:35,228 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 314 predicate places. [2023-01-28 06:44:35,228 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 1404 transitions, 33609 flow [2023-01-28 06:44:35,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 67.0) internal successors, (670), 10 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:44:35,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:44:35,228 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:44:35,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-01-28 06:44:35,228 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:44:35,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:44:35,229 INFO L85 PathProgramCache]: Analyzing trace with hash -853114316, now seen corresponding path program 3 times [2023-01-28 06:44:35,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:44:35,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435761734] [2023-01-28 06:44:35,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:44:35,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:44:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:44:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:44:35,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:44:35,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435761734] [2023-01-28 06:44:35,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435761734] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:44:35,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:44:35,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-01-28 06:44:35,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756793538] [2023-01-28 06:44:35,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:44:35,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 06:44:35,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:44:35,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 06:44:35,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-01-28 06:44:35,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 190 [2023-01-28 06:44:35,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 1404 transitions, 33609 flow. Second operand has 9 states, 9 states have (on average 68.22222222222223) internal successors, (614), 9 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:44:35,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:44:35,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 190 [2023-01-28 06:44:35,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:45:00,254 INFO L130 PetriNetUnfolder]: 52092/74581 cut-off events. [2023-01-28 06:45:00,254 INFO L131 PetriNetUnfolder]: For 2280062/2280062 co-relation queries the response was YES. [2023-01-28 06:45:01,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515462 conditions, 74581 events. 52092/74581 cut-off events. For 2280062/2280062 co-relation queries the response was YES. Maximal size of possible extension queue 4447. Compared 593891 event pairs, 5239 based on Foata normal form. 64/74627 useless extension candidates. Maximal degree in co-relation 515319. Up to 44512 conditions per place. [2023-01-28 06:45:02,327 INFO L137 encePairwiseOnDemand]: 175/190 looper letters, 838 selfloop transitions, 864 changer transitions 0/1706 dead transitions. [2023-01-28 06:45:02,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1706 transitions, 41011 flow [2023-01-28 06:45:02,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 06:45:02,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 06:45:02,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1647 transitions. [2023-01-28 06:45:02,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.412781954887218 [2023-01-28 06:45:02,329 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1647 transitions. [2023-01-28 06:45:02,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1647 transitions. [2023-01-28 06:45:02,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:45:02,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1647 transitions. [2023-01-28 06:45:02,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 78.42857142857143) internal successors, (1647), 21 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:45:02,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 190.0) internal successors, (4180), 22 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:45:02,333 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 190.0) internal successors, (4180), 22 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:45:02,333 INFO L175 Difference]: Start difference. First operand has 361 places, 1404 transitions, 33609 flow. Second operand 21 states and 1647 transitions. [2023-01-28 06:45:02,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1706 transitions, 41011 flow [2023-01-28 06:45:42,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 1706 transitions, 40020 flow, removed 307 selfloop flow, removed 12 redundant places. [2023-01-28 06:45:42,798 INFO L231 Difference]: Finished difference. Result has 377 places, 1479 transitions, 37933 flow [2023-01-28 06:45:42,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=32652, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=789, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=37933, PETRI_PLACES=377, PETRI_TRANSITIONS=1479} [2023-01-28 06:45:42,800 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 330 predicate places. [2023-01-28 06:45:42,800 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 1479 transitions, 37933 flow [2023-01-28 06:45:42,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 68.22222222222223) internal successors, (614), 9 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:45:42,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:45:42,800 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:45:42,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-01-28 06:45:42,800 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:45:42,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:45:42,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1446371134, now seen corresponding path program 2 times [2023-01-28 06:45:42,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:45:42,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079485933] [2023-01-28 06:45:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:45:42,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:45:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:45:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:45:42,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:45:42,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079485933] [2023-01-28 06:45:42,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079485933] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:45:42,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243147058] [2023-01-28 06:45:42,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 06:45:42,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:45:42,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:45:42,860 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 06:45:42,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 06:45:42,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-28 06:45:42,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 06:45:42,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 06:45:42,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:45:42,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:45:42,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:45:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:45:43,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243147058] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:45:43,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:45:43,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 8 [2023-01-28 06:45:43,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936582502] [2023-01-28 06:45:43,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:45:43,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 06:45:43,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:45:43,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 06:45:43,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-01-28 06:45:43,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 190 [2023-01-28 06:45:43,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 1479 transitions, 37933 flow. Second operand has 10 states, 10 states have (on average 69.3) internal successors, (693), 10 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:45:43,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:45:43,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 190 [2023-01-28 06:45:43,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:46:11,123 INFO L130 PetriNetUnfolder]: 55331/79162 cut-off events. [2023-01-28 06:46:11,123 INFO L131 PetriNetUnfolder]: For 2717760/2717760 co-relation queries the response was YES. [2023-01-28 06:46:12,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571017 conditions, 79162 events. 55331/79162 cut-off events. For 2717760/2717760 co-relation queries the response was YES. Maximal size of possible extension queue 4738. Compared 633316 event pairs, 5313 based on Foata normal form. 60/79208 useless extension candidates. Maximal degree in co-relation 570865. Up to 46716 conditions per place. [2023-01-28 06:46:13,355 INFO L137 encePairwiseOnDemand]: 174/190 looper letters, 903 selfloop transitions, 946 changer transitions 0/1853 dead transitions. [2023-01-28 06:46:13,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 1853 transitions, 47660 flow [2023-01-28 06:46:13,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 06:46:13,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 06:46:13,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1727 transitions. [2023-01-28 06:46:13,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131578947368421 [2023-01-28 06:46:13,357 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1727 transitions. [2023-01-28 06:46:13,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1727 transitions. [2023-01-28 06:46:13,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:46:13,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1727 transitions. [2023-01-28 06:46:13,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 78.5) internal successors, (1727), 22 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:46:13,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 190.0) internal successors, (4370), 23 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:46:13,361 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 190.0) internal successors, (4370), 23 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:46:13,361 INFO L175 Difference]: Start difference. First operand has 377 places, 1479 transitions, 37933 flow. Second operand 22 states and 1727 transitions. [2023-01-28 06:46:13,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 1853 transitions, 47660 flow [2023-01-28 06:47:11,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 1853 transitions, 47387 flow, removed 91 selfloop flow, removed 8 redundant places. [2023-01-28 06:47:11,900 INFO L231 Difference]: Finished difference. Result has 402 places, 1613 transitions, 45195 flow [2023-01-28 06:47:11,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=37683, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=820, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=45195, PETRI_PLACES=402, PETRI_TRANSITIONS=1613} [2023-01-28 06:47:11,901 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 355 predicate places. [2023-01-28 06:47:11,901 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 1613 transitions, 45195 flow [2023-01-28 06:47:11,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 69.3) internal successors, (693), 10 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:47:11,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:47:11,902 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:47:11,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 06:47:12,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:47:12,106 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:47:12,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:47:12,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1591475984, now seen corresponding path program 3 times [2023-01-28 06:47:12,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:47:12,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830109142] [2023-01-28 06:47:12,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:47:12,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:47:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:47:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:47:12,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:47:12,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830109142] [2023-01-28 06:47:12,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830109142] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:47:12,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:47:12,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-01-28 06:47:12,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585601381] [2023-01-28 06:47:12,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:47:12,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 06:47:12,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:47:12,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 06:47:12,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-01-28 06:47:12,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 190 [2023-01-28 06:47:12,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 1613 transitions, 45195 flow. Second operand has 9 states, 9 states have (on average 67.22222222222223) internal successors, (605), 9 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:47:12,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:47:12,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 190 [2023-01-28 06:47:12,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand