/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 17:59:55,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 17:59:55,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 17:59:55,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 17:59:55,067 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 17:59:55,068 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 17:59:55,068 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 17:59:55,069 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 17:59:55,070 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 17:59:55,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 17:59:55,071 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 17:59:55,072 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 17:59:55,072 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 17:59:55,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 17:59:55,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 17:59:55,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 17:59:55,074 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 17:59:55,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 17:59:55,076 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 17:59:55,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 17:59:55,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 17:59:55,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 17:59:55,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 17:59:55,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 17:59:55,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 17:59:55,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 17:59:55,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 17:59:55,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 17:59:55,090 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 [2023-01-27 17:59:55,104 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 17:59:55,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 17:59:55,105 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 17:59:55,105 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 17:59:55,105 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 17:59:55,105 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 17:59:55,105 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 17:59:55,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 17:59:55,105 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 17:59:55,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 17:59:55,106 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 17:59:55,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 17:59:55,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 17:59:55,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 17:59:55,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 17:59:55,106 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 17:59:55,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 17:59:55,106 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 17:59:55,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 17:59:55,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 17:59:55,106 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 17:59:55,107 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 17:59:55,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 17:59:55,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:59:55,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 17:59:55,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 17:59:55,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 17:59:55,107 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 17:59:55,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 17:59:55,107 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 17:59:55,107 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 17:59:55,107 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 17:59:55,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 17:59:55,311 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 17:59:55,313 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 17:59:55,313 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 17:59:55,314 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 17:59:55,314 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i [2023-01-27 17:59:56,156 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 17:59:56,375 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 17:59:56,376 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i [2023-01-27 17:59:56,387 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b810dda60/77873b20da824f6b91deca105b3eff70/FLAGe03496f9a [2023-01-27 17:59:56,396 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b810dda60/77873b20da824f6b91deca105b3eff70 [2023-01-27 17:59:56,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 17:59:56,399 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 17:59:56,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 17:59:56,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 17:59:56,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 17:59:56,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:59:56" (1/1) ... [2023-01-27 17:59:56,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78ec3eee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:59:56, skipping insertion in model container [2023-01-27 17:59:56,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:59:56" (1/1) ... [2023-01-27 17:59:56,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 17:59:56,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 17:59:56,533 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-01-27 17:59:56,644 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/45_monabsex1_vs.i[30633,30646] [2023-01-27 17:59:56,652 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:59:56,661 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 17:59:56,685 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-01-27 17:59:56,694 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/45_monabsex1_vs.i[30633,30646] [2023-01-27 17:59:56,696 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:59:56,718 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 17:59:56,718 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 17:59:56,718 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 17:59:56,723 INFO L208 MainTranslator]: Completed translation [2023-01-27 17:59:56,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:59:56 WrapperNode [2023-01-27 17:59:56,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 17:59:56,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 17:59:56,724 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 17:59:56,724 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 17:59:56,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:59:56" (1/1) ... [2023-01-27 17:59:56,739 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:59:56" (1/1) ... [2023-01-27 17:59:56,754 INFO L138 Inliner]: procedures = 171, calls = 15, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 27 [2023-01-27 17:59:56,755 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 17:59:56,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 17:59:56,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 17:59:56,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 17:59:56,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:59:56" (1/1) ... [2023-01-27 17:59:56,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:59:56" (1/1) ... [2023-01-27 17:59:56,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:59:56" (1/1) ... [2023-01-27 17:59:56,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:59:56" (1/1) ... [2023-01-27 17:59:56,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:59:56" (1/1) ... [2023-01-27 17:59:56,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:59:56" (1/1) ... [2023-01-27 17:59:56,771 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:59:56" (1/1) ... [2023-01-27 17:59:56,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:59:56" (1/1) ... [2023-01-27 17:59:56,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 17:59:56,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 17:59:56,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 17:59:56,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 17:59:56,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:59:56" (1/1) ... [2023-01-27 17:59:56,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:59:56,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:59:56,807 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) [2023-01-27 17:59:56,809 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 [2023-01-27 17:59:56,834 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-01-27 17:59:56,834 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-01-27 17:59:56,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 17:59:56,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 17:59:56,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 17:59:56,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 17:59:56,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 17:59:56,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 17:59:56,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 17:59:56,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 17:59:56,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 17:59:56,837 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 17:59:56,946 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 17:59:56,948 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 17:59:57,058 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 17:59:57,077 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 17:59:57,077 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-01-27 17:59:57,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:59:57 BoogieIcfgContainer [2023-01-27 17:59:57,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 17:59:57,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 17:59:57,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 17:59:57,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 17:59:57,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 05:59:56" (1/3) ... [2023-01-27 17:59:57,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18d893d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:59:57, skipping insertion in model container [2023-01-27 17:59:57,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:59:56" (2/3) ... [2023-01-27 17:59:57,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18d893d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:59:57, skipping insertion in model container [2023-01-27 17:59:57,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:59:57" (3/3) ... [2023-01-27 17:59:57,084 INFO L112 eAbstractionObserver]: Analyzing ICFG 45_monabsex1_vs.i [2023-01-27 17:59:57,114 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 17:59:57,115 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 17:59:57,115 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 17:59:57,154 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:59:57,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 40 transitions, 85 flow [2023-01-27 17:59:57,198 INFO L130 PetriNetUnfolder]: 2/50 cut-off events. [2023-01-27 17:59:57,198 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:59:57,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 50 events. 2/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 47 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 25. Up to 4 conditions per place. [2023-01-27 17:59:57,201 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 40 transitions, 85 flow [2023-01-27 17:59:57,207 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 40 transitions, 85 flow [2023-01-27 17:59:57,209 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:59:57,216 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 42 places, 40 transitions, 85 flow [2023-01-27 17:59:57,218 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 42 places, 40 transitions, 85 flow [2023-01-27 17:59:57,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 40 transitions, 85 flow [2023-01-27 17:59:57,227 INFO L130 PetriNetUnfolder]: 2/50 cut-off events. [2023-01-27 17:59:57,227 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:59:57,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 50 events. 2/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 47 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 25. Up to 4 conditions per place. [2023-01-27 17:59:57,228 INFO L119 LiptonReduction]: Number of co-enabled transitions 286 [2023-01-27 17:59:58,043 INFO L134 LiptonReduction]: Checked pairs total: 243 [2023-01-27 17:59:58,043 INFO L136 LiptonReduction]: Total number of compositions: 37 [2023-01-27 17:59:58,069 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:59:58,073 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;@7d2db0b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:59:58,073 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 17:59:58,075 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-01-27 17:59:58,075 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:59:58,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:59:58,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 17:59:58,076 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-27 17:59:58,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:59:58,080 INFO L85 PathProgramCache]: Analyzing trace with hash 5500569, now seen corresponding path program 1 times [2023-01-27 17:59:58,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:59:58,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599378118] [2023-01-27 17:59:58,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:59:58,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:59:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:59:58,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:59:58,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:59:58,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599378118] [2023-01-27 17:59:58,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599378118] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:59:58,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:59:58,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 17:59:58,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853070840] [2023-01-27 17:59:58,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:59:58,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-27 17:59:58,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:59:58,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-27 17:59:58,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-27 17:59:58,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 77 [2023-01-27 17:59:58,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:58,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:59:58,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 77 [2023-01-27 17:59:58,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:59:58,269 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-01-27 17:59:58,269 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:59:58,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 2 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-01-27 17:59:58,270 INFO L137 encePairwiseOnDemand]: 75/77 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-01-27 17:59:58,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2023-01-27 17:59:58,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-27 17:59:58,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-27 17:59:58,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 77 transitions. [2023-01-27 17:59:58,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-01-27 17:59:58,280 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 77 transitions. [2023-01-27 17:59:58,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 77 transitions. [2023-01-27 17:59:58,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:59:58,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 77 transitions. [2023-01-27 17:59:58,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:58,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:58,290 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:58,292 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 2 states and 77 transitions. [2023-01-27 17:59:58,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2023-01-27 17:59:58,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 17:59:58,297 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 17 flow [2023-01-27 17:59:58,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=17, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-01-27 17:59:58,301 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-01-27 17:59:58,302 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 17 flow [2023-01-27 17:59:58,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:58,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:59:58,302 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-27 17:59:58,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 17:59:58,302 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-27 17:59:58,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:59:58,304 INFO L85 PathProgramCache]: Analyzing trace with hash 991068589, now seen corresponding path program 1 times [2023-01-27 17:59:58,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:59:58,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676101276] [2023-01-27 17:59:58,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:59:58,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:59:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:59:58,343 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:59:58,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:59:58,365 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:59:58,365 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:59:58,367 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-01-27 17:59:58,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-01-27 17:59:58,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-01-27 17:59:58,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 17:59:58,369 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 17:59:58,371 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:59:58,371 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 17:59:58,387 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:59:58,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 52 transitions, 116 flow [2023-01-27 17:59:58,398 INFO L130 PetriNetUnfolder]: 3/74 cut-off events. [2023-01-27 17:59:58,399 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:59:58,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 74 events. 3/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 99 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2023-01-27 17:59:58,399 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 52 transitions, 116 flow [2023-01-27 17:59:58,400 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 52 transitions, 116 flow [2023-01-27 17:59:58,400 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:59:58,400 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 56 places, 52 transitions, 116 flow [2023-01-27 17:59:58,401 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 56 places, 52 transitions, 116 flow [2023-01-27 17:59:58,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 52 transitions, 116 flow [2023-01-27 17:59:58,410 INFO L130 PetriNetUnfolder]: 3/74 cut-off events. [2023-01-27 17:59:58,410 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:59:58,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 74 events. 3/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 99 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2023-01-27 17:59:58,411 INFO L119 LiptonReduction]: Number of co-enabled transitions 836 [2023-01-27 17:59:59,202 INFO L134 LiptonReduction]: Checked pairs total: 1109 [2023-01-27 17:59:59,202 INFO L136 LiptonReduction]: Total number of compositions: 39 [2023-01-27 17:59:59,204 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:59:59,204 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;@7d2db0b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:59:59,205 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 17:59:59,206 INFO L130 PetriNetUnfolder]: 0/7 cut-off events. [2023-01-27 17:59:59,206 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:59:59,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:59:59,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 17:59:59,207 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 17:59:59,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:59:59,207 INFO L85 PathProgramCache]: Analyzing trace with hash 269791410, now seen corresponding path program 1 times [2023-01-27 17:59:59,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:59:59,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530731680] [2023-01-27 17:59:59,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:59:59,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:59:59,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:59:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:59:59,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:59:59,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530731680] [2023-01-27 17:59:59,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530731680] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:59:59,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:59:59,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 17:59:59,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972211799] [2023-01-27 17:59:59,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:59:59,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:59:59,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:59:59,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:59:59,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:59:59,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 91 [2023-01-27 17:59:59,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:59,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:59:59,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 91 [2023-01-27 17:59:59,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:59:59,290 INFO L130 PetriNetUnfolder]: 42/97 cut-off events. [2023-01-27 17:59:59,290 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-01-27 17:59:59,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 97 events. 42/97 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 409 event pairs, 16 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 160. Up to 47 conditions per place. [2023-01-27 17:59:59,291 INFO L137 encePairwiseOnDemand]: 86/91 looper letters, 13 selfloop transitions, 3 changer transitions 0/19 dead transitions. [2023-01-27 17:59:59,292 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 19 transitions, 87 flow [2023-01-27 17:59:59,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:59:59,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:59:59,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2023-01-27 17:59:59,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2023-01-27 17:59:59,293 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 133 transitions. [2023-01-27 17:59:59,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 133 transitions. [2023-01-27 17:59:59,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:59:59,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 133 transitions. [2023-01-27 17:59:59,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:59,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:59,295 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:59,295 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 40 flow. Second operand 3 states and 133 transitions. [2023-01-27 17:59:59,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 19 transitions, 87 flow [2023-01-27 17:59:59,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 19 transitions, 85 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-01-27 17:59:59,296 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 58 flow [2023-01-27 17:59:59,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-01-27 17:59:59,297 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 3 predicate places. [2023-01-27 17:59:59,297 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 58 flow [2023-01-27 17:59:59,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:59,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:59:59,298 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:59:59,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 17:59:59,298 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 17:59:59,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:59:59,298 INFO L85 PathProgramCache]: Analyzing trace with hash 859269627, now seen corresponding path program 1 times [2023-01-27 17:59:59,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:59:59,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860598005] [2023-01-27 17:59:59,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:59:59,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:59:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:59:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 17:59:59,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:59:59,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860598005] [2023-01-27 17:59:59,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860598005] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:59:59,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:59:59,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 17:59:59,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592888760] [2023-01-27 17:59:59,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:59:59,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:59:59,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:59:59,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:59:59,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:59:59,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 91 [2023-01-27 17:59:59,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:59,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:59:59,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 91 [2023-01-27 17:59:59,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:59:59,376 INFO L130 PetriNetUnfolder]: 33/92 cut-off events. [2023-01-27 17:59:59,377 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 17:59:59,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 92 events. 33/92 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 387 event pairs, 18 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 98. Up to 41 conditions per place. [2023-01-27 17:59:59,386 INFO L137 encePairwiseOnDemand]: 87/91 looper letters, 12 selfloop transitions, 4 changer transitions 0/19 dead transitions. [2023-01-27 17:59:59,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 19 transitions, 104 flow [2023-01-27 17:59:59,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:59:59,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:59:59,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-01-27 17:59:59,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2023-01-27 17:59:59,389 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-01-27 17:59:59,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-01-27 17:59:59,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:59:59,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-01-27 17:59:59,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:59,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:59,394 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:59,394 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 58 flow. Second operand 3 states and 129 transitions. [2023-01-27 17:59:59,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 19 transitions, 104 flow [2023-01-27 17:59:59,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 19 transitions, 96 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 17:59:59,396 INFO L231 Difference]: Finished difference. Result has 24 places, 17 transitions, 80 flow [2023-01-27 17:59:59,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=24, PETRI_TRANSITIONS=17} [2023-01-27 17:59:59,398 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 5 predicate places. [2023-01-27 17:59:59,399 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 17 transitions, 80 flow [2023-01-27 17:59:59,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:59,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:59:59,400 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:59:59,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 17:59:59,401 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 17:59:59,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:59:59,401 INFO L85 PathProgramCache]: Analyzing trace with hash 868592532, now seen corresponding path program 1 times [2023-01-27 17:59:59,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:59:59,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254511689] [2023-01-27 17:59:59,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:59:59,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:59:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:59:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 17:59:59,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:59:59,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254511689] [2023-01-27 17:59:59,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254511689] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:59:59,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:59:59,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:59:59,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891642491] [2023-01-27 17:59:59,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:59:59,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 17:59:59,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:59:59,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 17:59:59,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 17:59:59,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 91 [2023-01-27 17:59:59,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:59,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:59:59,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 91 [2023-01-27 17:59:59,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:59:59,499 INFO L130 PetriNetUnfolder]: 29/78 cut-off events. [2023-01-27 17:59:59,499 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2023-01-27 17:59:59,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 78 events. 29/78 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 304 event pairs, 6 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 192. Up to 61 conditions per place. [2023-01-27 17:59:59,500 INFO L137 encePairwiseOnDemand]: 89/91 looper letters, 14 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2023-01-27 17:59:59,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 19 transitions, 121 flow [2023-01-27 17:59:59,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:59:59,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:59:59,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2023-01-27 17:59:59,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46886446886446886 [2023-01-27 17:59:59,502 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 128 transitions. [2023-01-27 17:59:59,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 128 transitions. [2023-01-27 17:59:59,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:59:59,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 128 transitions. [2023-01-27 17:59:59,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:59,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:59,503 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:59,503 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 80 flow. Second operand 3 states and 128 transitions. [2023-01-27 17:59:59,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 19 transitions, 121 flow [2023-01-27 17:59:59,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 113 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 17:59:59,505 INFO L231 Difference]: Finished difference. Result has 23 places, 16 transitions, 72 flow [2023-01-27 17:59:59,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=23, PETRI_TRANSITIONS=16} [2023-01-27 17:59:59,505 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2023-01-27 17:59:59,505 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 16 transitions, 72 flow [2023-01-27 17:59:59,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:59,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:59:59,506 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:59:59,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 17:59:59,506 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 17:59:59,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:59:59,506 INFO L85 PathProgramCache]: Analyzing trace with hash 867556501, now seen corresponding path program 1 times [2023-01-27 17:59:59,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:59:59,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346079106] [2023-01-27 17:59:59,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:59:59,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:59:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:59:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 17:59:59,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:59:59,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346079106] [2023-01-27 17:59:59,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346079106] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:59:59,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:59:59,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:59:59,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622931766] [2023-01-27 17:59:59,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:59:59,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 17:59:59,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:59:59,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 17:59:59,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 17:59:59,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 91 [2023-01-27 17:59:59,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 16 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:59,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:59:59,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 91 [2023-01-27 17:59:59,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:59:59,602 INFO L130 PetriNetUnfolder]: 25/76 cut-off events. [2023-01-27 17:59:59,602 INFO L131 PetriNetUnfolder]: For 58/58 co-relation queries the response was YES. [2023-01-27 17:59:59,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 76 events. 25/76 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 303 event pairs, 8 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 94. Up to 45 conditions per place. [2023-01-27 17:59:59,603 INFO L137 encePairwiseOnDemand]: 89/91 looper letters, 12 selfloop transitions, 2 changer transitions 0/17 dead transitions. [2023-01-27 17:59:59,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 17 transitions, 102 flow [2023-01-27 17:59:59,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:59:59,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:59:59,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2023-01-27 17:59:59,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2023-01-27 17:59:59,605 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 126 transitions. [2023-01-27 17:59:59,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 126 transitions. [2023-01-27 17:59:59,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:59:59,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 126 transitions. [2023-01-27 17:59:59,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:59,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:59,607 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:59,607 INFO L175 Difference]: Start difference. First operand has 23 places, 16 transitions, 72 flow. Second operand 3 states and 126 transitions. [2023-01-27 17:59:59,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 17 transitions, 102 flow [2023-01-27 17:59:59,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 17 transitions, 100 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 17:59:59,608 INFO L231 Difference]: Finished difference. Result has 23 places, 15 transitions, 70 flow [2023-01-27 17:59:59,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=23, PETRI_TRANSITIONS=15} [2023-01-27 17:59:59,608 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2023-01-27 17:59:59,609 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 15 transitions, 70 flow [2023-01-27 17:59:59,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:59,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:59:59,609 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-27 17:59:59,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 17:59:59,609 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 17:59:59,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:59:59,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1122441926, now seen corresponding path program 1 times [2023-01-27 17:59:59,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:59:59,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332978343] [2023-01-27 17:59:59,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:59:59,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:59:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:59:59,618 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:59:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:59:59,626 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:59:59,626 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:59:59,627 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-01-27 17:59:59,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-27 17:59:59,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-01-27 17:59:59,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-27 17:59:59,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 17:59:59,627 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-01-27 17:59:59,628 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:59:59,628 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 17:59:59,638 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:59:59,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 64 transitions, 149 flow [2023-01-27 17:59:59,646 INFO L130 PetriNetUnfolder]: 4/98 cut-off events. [2023-01-27 17:59:59,646 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 17:59:59,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 98 events. 4/98 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 149 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 78. Up to 8 conditions per place. [2023-01-27 17:59:59,647 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 64 transitions, 149 flow [2023-01-27 17:59:59,647 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 64 transitions, 149 flow [2023-01-27 17:59:59,647 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:59:59,648 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 64 transitions, 149 flow [2023-01-27 17:59:59,648 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 64 transitions, 149 flow [2023-01-27 17:59:59,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 64 transitions, 149 flow [2023-01-27 17:59:59,654 INFO L130 PetriNetUnfolder]: 4/98 cut-off events. [2023-01-27 17:59:59,654 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 17:59:59,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 98 events. 4/98 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 149 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 78. Up to 8 conditions per place. [2023-01-27 17:59:59,655 INFO L119 LiptonReduction]: Number of co-enabled transitions 1650 [2023-01-27 18:00:00,439 INFO L134 LiptonReduction]: Checked pairs total: 2465 [2023-01-27 18:00:00,439 INFO L136 LiptonReduction]: Total number of compositions: 47 [2023-01-27 18:00:00,440 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 18:00:00,441 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;@7d2db0b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 18:00:00,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 18:00:00,443 INFO L130 PetriNetUnfolder]: 0/7 cut-off events. [2023-01-27 18:00:00,443 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 18:00:00,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:00,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 18:00:00,444 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 18:00:00,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:00,444 INFO L85 PathProgramCache]: Analyzing trace with hash 387072883, now seen corresponding path program 1 times [2023-01-27 18:00:00,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:00,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483176317] [2023-01-27 18:00:00,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:00,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 18:00:00,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:00,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483176317] [2023-01-27 18:00:00,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483176317] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:00,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:00,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:00:00,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113890820] [2023-01-27 18:00:00,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:00,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:00:00,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:00,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:00:00,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:00:00,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2023-01-27 18:00:00,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:00,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2023-01-27 18:00:00,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:00,536 INFO L130 PetriNetUnfolder]: 370/649 cut-off events. [2023-01-27 18:00:00,536 INFO L131 PetriNetUnfolder]: For 169/169 co-relation queries the response was YES. [2023-01-27 18:00:00,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1394 conditions, 649 events. 370/649 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3493 event pairs, 180 based on Foata normal form. 0/500 useless extension candidates. Maximal degree in co-relation 328. Up to 363 conditions per place. [2023-01-27 18:00:00,540 INFO L137 encePairwiseOnDemand]: 105/111 looper letters, 20 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2023-01-27 18:00:00,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 135 flow [2023-01-27 18:00:00,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:00,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:00,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2023-01-27 18:00:00,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954954954954955 [2023-01-27 18:00:00,541 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 165 transitions. [2023-01-27 18:00:00,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 165 transitions. [2023-01-27 18:00:00,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:00,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 165 transitions. [2023-01-27 18:00:00,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,543 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,543 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 57 flow. Second operand 3 states and 165 transitions. [2023-01-27 18:00:00,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 135 flow [2023-01-27 18:00:00,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 27 transitions, 127 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-01-27 18:00:00,544 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 79 flow [2023-01-27 18:00:00,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-01-27 18:00:00,544 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-01-27 18:00:00,545 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 79 flow [2023-01-27 18:00:00,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:00,545 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:00,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 18:00:00,545 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 18:00:00,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:00,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1708330831, now seen corresponding path program 1 times [2023-01-27 18:00:00,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:00,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104777873] [2023-01-27 18:00:00,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:00,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:00,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 18:00:00,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:00,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104777873] [2023-01-27 18:00:00,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104777873] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:00,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:00,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:00:00,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490184055] [2023-01-27 18:00:00,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:00,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:00:00,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:00,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:00:00,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:00:00,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2023-01-27 18:00:00,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:00,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2023-01-27 18:00:00,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:00,623 INFO L130 PetriNetUnfolder]: 432/765 cut-off events. [2023-01-27 18:00:00,623 INFO L131 PetriNetUnfolder]: For 445/445 co-relation queries the response was YES. [2023-01-27 18:00:00,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1996 conditions, 765 events. 432/765 cut-off events. For 445/445 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 4381 event pairs, 182 based on Foata normal form. 0/647 useless extension candidates. Maximal degree in co-relation 950. Up to 429 conditions per place. [2023-01-27 18:00:00,627 INFO L137 encePairwiseOnDemand]: 106/111 looper letters, 22 selfloop transitions, 6 changer transitions 0/31 dead transitions. [2023-01-27 18:00:00,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 31 transitions, 180 flow [2023-01-27 18:00:00,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:00,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:00,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-01-27 18:00:00,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2023-01-27 18:00:00,628 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-01-27 18:00:00,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-01-27 18:00:00,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:00,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-01-27 18:00:00,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,630 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,630 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 79 flow. Second operand 3 states and 162 transitions. [2023-01-27 18:00:00,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 31 transitions, 180 flow [2023-01-27 18:00:00,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 31 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:00:00,632 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 119 flow [2023-01-27 18:00:00,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-01-27 18:00:00,632 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2023-01-27 18:00:00,633 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 119 flow [2023-01-27 18:00:00,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:00,633 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:00,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 18:00:00,633 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 18:00:00,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:00,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1419948381, now seen corresponding path program 1 times [2023-01-27 18:00:00,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:00,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386926632] [2023-01-27 18:00:00,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:00,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:00,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:00,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 18:00:00,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:00,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386926632] [2023-01-27 18:00:00,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386926632] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:00,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:00,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:00:00,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853389485] [2023-01-27 18:00:00,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:00,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 18:00:00,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:00,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 18:00:00,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 18:00:00,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2023-01-27 18:00:00,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 119 flow. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:00,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2023-01-27 18:00:00,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:00,726 INFO L130 PetriNetUnfolder]: 352/619 cut-off events. [2023-01-27 18:00:00,727 INFO L131 PetriNetUnfolder]: For 556/556 co-relation queries the response was YES. [2023-01-27 18:00:00,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1887 conditions, 619 events. 352/619 cut-off events. For 556/556 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 3525 event pairs, 64 based on Foata normal form. 0/557 useless extension candidates. Maximal degree in co-relation 1834. Up to 512 conditions per place. [2023-01-27 18:00:00,730 INFO L137 encePairwiseOnDemand]: 109/111 looper letters, 28 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-01-27 18:00:00,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 33 transitions, 225 flow [2023-01-27 18:00:00,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:00,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:00,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2023-01-27 18:00:00,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48348348348348347 [2023-01-27 18:00:00,756 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 161 transitions. [2023-01-27 18:00:00,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 161 transitions. [2023-01-27 18:00:00,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:00,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 161 transitions. [2023-01-27 18:00:00,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,758 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,758 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 119 flow. Second operand 3 states and 161 transitions. [2023-01-27 18:00:00,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 33 transitions, 225 flow [2023-01-27 18:00:00,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 33 transitions, 207 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:00:00,760 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 107 flow [2023-01-27 18:00:00,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-01-27 18:00:00,760 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-01-27 18:00:00,760 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 107 flow [2023-01-27 18:00:00,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:00,761 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:00,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-27 18:00:00,761 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 18:00:00,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:00,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1418650112, now seen corresponding path program 1 times [2023-01-27 18:00:00,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:00,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660824596] [2023-01-27 18:00:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:00,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:00,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 18:00:00,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:00,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660824596] [2023-01-27 18:00:00,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660824596] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:00,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:00,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:00:00,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597176372] [2023-01-27 18:00:00,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:00,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 18:00:00,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:00,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 18:00:00,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 18:00:00,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2023-01-27 18:00:00,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:00,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2023-01-27 18:00:00,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:00,867 INFO L130 PetriNetUnfolder]: 285/518 cut-off events. [2023-01-27 18:00:00,867 INFO L131 PetriNetUnfolder]: For 392/392 co-relation queries the response was YES. [2023-01-27 18:00:00,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1527 conditions, 518 events. 285/518 cut-off events. For 392/392 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 2833 event pairs, 51 based on Foata normal form. 0/466 useless extension candidates. Maximal degree in co-relation 778. Up to 412 conditions per place. [2023-01-27 18:00:00,870 INFO L137 encePairwiseOnDemand]: 109/111 looper letters, 25 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-01-27 18:00:00,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 30 transitions, 192 flow [2023-01-27 18:00:00,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:00,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:00,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 158 transitions. [2023-01-27 18:00:00,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744744744744745 [2023-01-27 18:00:00,871 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 158 transitions. [2023-01-27 18:00:00,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 158 transitions. [2023-01-27 18:00:00,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:00,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 158 transitions. [2023-01-27 18:00:00,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,872 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,872 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 107 flow. Second operand 3 states and 158 transitions. [2023-01-27 18:00:00,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 30 transitions, 192 flow [2023-01-27 18:00:00,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 30 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 18:00:00,874 INFO L231 Difference]: Finished difference. Result has 29 places, 22 transitions, 105 flow [2023-01-27 18:00:00,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=29, PETRI_TRANSITIONS=22} [2023-01-27 18:00:00,875 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-01-27 18:00:00,875 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 22 transitions, 105 flow [2023-01-27 18:00:00,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:00,875 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:00,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 18:00:00,876 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 18:00:00,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:00,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1905498328, now seen corresponding path program 1 times [2023-01-27 18:00:00,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:00,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501017374] [2023-01-27 18:00:00,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:00,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:00,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 18:00:00,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:00,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501017374] [2023-01-27 18:00:00,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501017374] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:00,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:00,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:00:00,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683850194] [2023-01-27 18:00:00,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:00,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:00:00,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:00,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:00:00,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:00:00,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2023-01-27 18:00:00,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:00,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2023-01-27 18:00:00,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:00,940 INFO L130 PetriNetUnfolder]: 284/582 cut-off events. [2023-01-27 18:00:00,941 INFO L131 PetriNetUnfolder]: For 470/470 co-relation queries the response was YES. [2023-01-27 18:00:00,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1687 conditions, 582 events. 284/582 cut-off events. For 470/470 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 3503 event pairs, 140 based on Foata normal form. 0/548 useless extension candidates. Maximal degree in co-relation 904. Up to 341 conditions per place. [2023-01-27 18:00:00,945 INFO L137 encePairwiseOnDemand]: 106/111 looper letters, 20 selfloop transitions, 9 changer transitions 0/32 dead transitions. [2023-01-27 18:00:00,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 32 transitions, 213 flow [2023-01-27 18:00:00,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:00,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:00,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2023-01-27 18:00:00,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47147147147147145 [2023-01-27 18:00:00,946 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 157 transitions. [2023-01-27 18:00:00,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 157 transitions. [2023-01-27 18:00:00,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:00,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 157 transitions. [2023-01-27 18:00:00,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,948 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 105 flow. Second operand 3 states and 157 transitions. [2023-01-27 18:00:00,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 32 transitions, 213 flow [2023-01-27 18:00:00,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 32 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 18:00:00,949 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 181 flow [2023-01-27 18:00:00,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-01-27 18:00:00,950 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 7 predicate places. [2023-01-27 18:00:00,950 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 181 flow [2023-01-27 18:00:00,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:00,950 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:00,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-27 18:00:00,951 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 18:00:00,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:00,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1059096539, now seen corresponding path program 1 times [2023-01-27 18:00:00,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:00,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197464880] [2023-01-27 18:00:00,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:00,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 18:00:00,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:00,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197464880] [2023-01-27 18:00:00,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197464880] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:00,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:00,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:00:00,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994311895] [2023-01-27 18:00:00,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:00,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 18:00:00,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:00,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 18:00:00,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 18:00:00,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2023-01-27 18:00:00,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 181 flow. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:00,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:00,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2023-01-27 18:00:00,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:01,041 INFO L130 PetriNetUnfolder]: 237/505 cut-off events. [2023-01-27 18:00:01,041 INFO L131 PetriNetUnfolder]: For 763/763 co-relation queries the response was YES. [2023-01-27 18:00:01,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1756 conditions, 505 events. 237/505 cut-off events. For 763/763 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3005 event pairs, 79 based on Foata normal form. 30/531 useless extension candidates. Maximal degree in co-relation 924. Up to 316 conditions per place. [2023-01-27 18:00:01,044 INFO L137 encePairwiseOnDemand]: 109/111 looper letters, 26 selfloop transitions, 4 changer transitions 0/33 dead transitions. [2023-01-27 18:00:01,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 273 flow [2023-01-27 18:00:01,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:01,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:01,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2023-01-27 18:00:01,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46546546546546547 [2023-01-27 18:00:01,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 155 transitions. [2023-01-27 18:00:01,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 155 transitions. [2023-01-27 18:00:01,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:01,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 155 transitions. [2023-01-27 18:00:01,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:01,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:01,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:01,047 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 181 flow. Second operand 3 states and 155 transitions. [2023-01-27 18:00:01,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 273 flow [2023-01-27 18:00:01,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 33 transitions, 255 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:00:01,048 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 167 flow [2023-01-27 18:00:01,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-01-27 18:00:01,049 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 6 predicate places. [2023-01-27 18:00:01,049 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 167 flow [2023-01-27 18:00:01,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:01,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:01,049 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-27 18:00:01,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-27 18:00:01,049 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 18:00:01,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:01,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1530336096, now seen corresponding path program 1 times [2023-01-27 18:00:01,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:01,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301421498] [2023-01-27 18:00:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:01,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 18:00:01,062 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 18:00:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 18:00:01,075 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 18:00:01,075 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 18:00:01,076 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-01-27 18:00:01,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-27 18:00:01,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-27 18:00:01,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-27 18:00:01,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-27 18:00:01,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-01-27 18:00:01,076 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:01,077 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 18:00:01,077 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 18:00:01,097 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 18:00:01,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 76 transitions, 184 flow [2023-01-27 18:00:01,108 INFO L130 PetriNetUnfolder]: 5/122 cut-off events. [2023-01-27 18:00:01,108 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 18:00:01,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 122 events. 5/122 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 205 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 106. Up to 10 conditions per place. [2023-01-27 18:00:01,108 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 76 transitions, 184 flow [2023-01-27 18:00:01,109 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 76 transitions, 184 flow [2023-01-27 18:00:01,109 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 18:00:01,109 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 76 transitions, 184 flow [2023-01-27 18:00:01,109 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 76 transitions, 184 flow [2023-01-27 18:00:01,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 76 transitions, 184 flow [2023-01-27 18:00:01,116 INFO L130 PetriNetUnfolder]: 5/122 cut-off events. [2023-01-27 18:00:01,116 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 18:00:01,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 122 events. 5/122 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 205 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 106. Up to 10 conditions per place. [2023-01-27 18:00:01,118 INFO L119 LiptonReduction]: Number of co-enabled transitions 2728 [2023-01-27 18:00:01,999 INFO L134 LiptonReduction]: Checked pairs total: 3813 [2023-01-27 18:00:01,999 INFO L136 LiptonReduction]: Total number of compositions: 55 [2023-01-27 18:00:02,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 18:00:02,000 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;@7d2db0b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 18:00:02,000 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-27 18:00:02,001 INFO L130 PetriNetUnfolder]: 0/7 cut-off events. [2023-01-27 18:00:02,001 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 18:00:02,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:02,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 18:00:02,002 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 18:00:02,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:02,002 INFO L85 PathProgramCache]: Analyzing trace with hash 522516946, now seen corresponding path program 1 times [2023-01-27 18:00:02,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:02,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986937713] [2023-01-27 18:00:02,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:02,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 18:00:02,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:02,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986937713] [2023-01-27 18:00:02,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986937713] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:02,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:02,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:00:02,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729360930] [2023-01-27 18:00:02,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:02,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:00:02,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:02,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:00:02,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:00:02,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-01-27 18:00:02,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:02,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:02,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-01-27 18:00:02,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:02,195 INFO L130 PetriNetUnfolder]: 2300/3511 cut-off events. [2023-01-27 18:00:02,195 INFO L131 PetriNetUnfolder]: For 1374/1374 co-relation queries the response was YES. [2023-01-27 18:00:02,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7619 conditions, 3511 events. 2300/3511 cut-off events. For 1374/1374 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 20881 event pairs, 1224 based on Foata normal form. 0/2580 useless extension candidates. Maximal degree in co-relation 1418. Up to 2129 conditions per place. [2023-01-27 18:00:02,239 INFO L137 encePairwiseOnDemand]: 124/131 looper letters, 27 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2023-01-27 18:00:02,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 187 flow [2023-01-27 18:00:02,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:02,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:02,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2023-01-27 18:00:02,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5012722646310432 [2023-01-27 18:00:02,240 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 197 transitions. [2023-01-27 18:00:02,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 197 transitions. [2023-01-27 18:00:02,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:02,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 197 transitions. [2023-01-27 18:00:02,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:02,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:02,242 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:02,242 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 76 flow. Second operand 3 states and 197 transitions. [2023-01-27 18:00:02,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 187 flow [2023-01-27 18:00:02,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 169 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-01-27 18:00:02,243 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 100 flow [2023-01-27 18:00:02,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2023-01-27 18:00:02,244 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2023-01-27 18:00:02,244 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 100 flow [2023-01-27 18:00:02,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:02,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:02,244 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:02,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-01-27 18:00:02,244 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 18:00:02,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:02,245 INFO L85 PathProgramCache]: Analyzing trace with hash -61129782, now seen corresponding path program 1 times [2023-01-27 18:00:02,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:02,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74777587] [2023-01-27 18:00:02,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:02,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:02,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 18:00:02,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:02,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74777587] [2023-01-27 18:00:02,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74777587] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:02,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:02,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:00:02,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626931159] [2023-01-27 18:00:02,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:02,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:00:02,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:02,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:00:02,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:00:02,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-01-27 18:00:02,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:02,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:02,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-01-27 18:00:02,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:02,502 INFO L130 PetriNetUnfolder]: 3060/4717 cut-off events. [2023-01-27 18:00:02,502 INFO L131 PetriNetUnfolder]: For 2755/2755 co-relation queries the response was YES. [2023-01-27 18:00:02,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12124 conditions, 4717 events. 3060/4717 cut-off events. For 2755/2755 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 30285 event pairs, 1352 based on Foata normal form. 0/3849 useless extension candidates. Maximal degree in co-relation 5760. Up to 2885 conditions per place. [2023-01-27 18:00:02,532 INFO L137 encePairwiseOnDemand]: 125/131 looper letters, 30 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2023-01-27 18:00:02,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 41 transitions, 242 flow [2023-01-27 18:00:02,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:02,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:02,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 194 transitions. [2023-01-27 18:00:02,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49363867684478374 [2023-01-27 18:00:02,533 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 194 transitions. [2023-01-27 18:00:02,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 194 transitions. [2023-01-27 18:00:02,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:02,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 194 transitions. [2023-01-27 18:00:02,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:02,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:02,535 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:02,535 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 100 flow. Second operand 3 states and 194 transitions. [2023-01-27 18:00:02,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 41 transitions, 242 flow [2023-01-27 18:00:02,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 41 transitions, 224 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:00:02,543 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 158 flow [2023-01-27 18:00:02,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-01-27 18:00:02,544 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2023-01-27 18:00:02,544 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 158 flow [2023-01-27 18:00:02,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:02,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:02,544 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:02,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-01-27 18:00:02,544 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 18:00:02,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:02,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1893461327, now seen corresponding path program 1 times [2023-01-27 18:00:02,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:02,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940590878] [2023-01-27 18:00:02,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:02,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 18:00:02,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:02,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940590878] [2023-01-27 18:00:02,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940590878] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:02,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:02,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:00:02,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810583447] [2023-01-27 18:00:02,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:02,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 18:00:02,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:02,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 18:00:02,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 18:00:02,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-01-27 18:00:02,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:02,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:02,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-01-27 18:00:02,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:02,852 INFO L130 PetriNetUnfolder]: 2474/3707 cut-off events. [2023-01-27 18:00:02,853 INFO L131 PetriNetUnfolder]: For 3413/3413 co-relation queries the response was YES. [2023-01-27 18:00:02,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11159 conditions, 3707 events. 2474/3707 cut-off events. For 3413/3413 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 22880 event pairs, 472 based on Foata normal form. 0/3135 useless extension candidates. Maximal degree in co-relation 11105. Up to 3026 conditions per place. [2023-01-27 18:00:02,900 INFO L137 encePairwiseOnDemand]: 129/131 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-01-27 18:00:02,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 321 flow [2023-01-27 18:00:02,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:02,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:02,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 193 transitions. [2023-01-27 18:00:02,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4910941475826972 [2023-01-27 18:00:02,901 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 193 transitions. [2023-01-27 18:00:02,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 193 transitions. [2023-01-27 18:00:02,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:02,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 193 transitions. [2023-01-27 18:00:02,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:02,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:02,902 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:02,903 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 158 flow. Second operand 3 states and 193 transitions. [2023-01-27 18:00:02,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 321 flow [2023-01-27 18:00:02,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 297 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:00:02,910 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 142 flow [2023-01-27 18:00:02,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-01-27 18:00:02,910 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2023-01-27 18:00:02,911 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 142 flow [2023-01-27 18:00:02,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:02,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:02,911 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:02,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-01-27 18:00:02,911 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 18:00:02,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:02,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1895020926, now seen corresponding path program 1 times [2023-01-27 18:00:02,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:02,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240868958] [2023-01-27 18:00:02,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:02,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 18:00:02,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:02,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240868958] [2023-01-27 18:00:02,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240868958] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:02,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:02,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:00:02,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626200145] [2023-01-27 18:00:02,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:02,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 18:00:02,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:02,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 18:00:02,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 18:00:02,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-01-27 18:00:02,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:02,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:02,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-01-27 18:00:02,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:03,105 INFO L130 PetriNetUnfolder]: 1993/3029 cut-off events. [2023-01-27 18:00:03,105 INFO L131 PetriNetUnfolder]: For 2304/2304 co-relation queries the response was YES. [2023-01-27 18:00:03,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8826 conditions, 3029 events. 1993/3029 cut-off events. For 2304/2304 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 18194 event pairs, 335 based on Foata normal form. 0/2587 useless extension candidates. Maximal degree in co-relation 4399. Up to 2450 conditions per place. [2023-01-27 18:00:03,121 INFO L137 encePairwiseOnDemand]: 129/131 looper letters, 38 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-01-27 18:00:03,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 43 transitions, 282 flow [2023-01-27 18:00:03,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:03,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:03,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 190 transitions. [2023-01-27 18:00:03,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48346055979643765 [2023-01-27 18:00:03,123 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 190 transitions. [2023-01-27 18:00:03,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 190 transitions. [2023-01-27 18:00:03,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:03,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 190 transitions. [2023-01-27 18:00:03,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:03,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:03,124 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:03,124 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 142 flow. Second operand 3 states and 190 transitions. [2023-01-27 18:00:03,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 43 transitions, 282 flow [2023-01-27 18:00:03,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 43 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 18:00:03,126 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 140 flow [2023-01-27 18:00:03,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-01-27 18:00:03,126 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2023-01-27 18:00:03,126 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 140 flow [2023-01-27 18:00:03,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:03,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:03,126 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:03,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-01-27 18:00:03,127 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 18:00:03,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:03,127 INFO L85 PathProgramCache]: Analyzing trace with hash -189575826, now seen corresponding path program 1 times [2023-01-27 18:00:03,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:03,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256487451] [2023-01-27 18:00:03,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:03,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 18:00:03,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:03,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256487451] [2023-01-27 18:00:03,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256487451] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:03,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:03,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:00:03,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819779716] [2023-01-27 18:00:03,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:03,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:00:03,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:03,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:00:03,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:00:03,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-01-27 18:00:03,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:03,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:03,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-01-27 18:00:03,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:03,449 INFO L130 PetriNetUnfolder]: 2430/3913 cut-off events. [2023-01-27 18:00:03,449 INFO L131 PetriNetUnfolder]: For 3547/3547 co-relation queries the response was YES. [2023-01-27 18:00:03,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11283 conditions, 3913 events. 2430/3913 cut-off events. For 3547/3547 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 26090 event pairs, 988 based on Foata normal form. 0/3420 useless extension candidates. Maximal degree in co-relation 6586. Up to 2459 conditions per place. [2023-01-27 18:00:03,473 INFO L137 encePairwiseOnDemand]: 125/131 looper letters, 30 selfloop transitions, 13 changer transitions 0/46 dead transitions. [2023-01-27 18:00:03,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 311 flow [2023-01-27 18:00:03,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:03,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:03,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-01-27 18:00:03,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48091603053435117 [2023-01-27 18:00:03,474 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-01-27 18:00:03,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-01-27 18:00:03,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:03,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-01-27 18:00:03,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:03,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:03,476 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:03,477 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 140 flow. Second operand 3 states and 189 transitions. [2023-01-27 18:00:03,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 311 flow [2023-01-27 18:00:03,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 46 transitions, 307 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 18:00:03,479 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 264 flow [2023-01-27 18:00:03,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=264, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2023-01-27 18:00:03,481 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2023-01-27 18:00:03,481 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 264 flow [2023-01-27 18:00:03,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:03,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:03,481 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:03,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-01-27 18:00:03,482 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 18:00:03,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:03,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1581880004, now seen corresponding path program 1 times [2023-01-27 18:00:03,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:03,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579526248] [2023-01-27 18:00:03,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:03,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 18:00:03,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:03,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579526248] [2023-01-27 18:00:03,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579526248] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:03,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:03,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:00:03,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179901919] [2023-01-27 18:00:03,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:03,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 18:00:03,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:03,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 18:00:03,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 18:00:03,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-01-27 18:00:03,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 264 flow. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:03,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:03,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-01-27 18:00:03,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:03,830 INFO L130 PetriNetUnfolder]: 1955/3099 cut-off events. [2023-01-27 18:00:03,831 INFO L131 PetriNetUnfolder]: For 5131/5131 co-relation queries the response was YES. [2023-01-27 18:00:03,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11103 conditions, 3099 events. 1955/3099 cut-off events. For 5131/5131 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 19739 event pairs, 409 based on Foata normal form. 204/3066 useless extension candidates. Maximal degree in co-relation 6139. Up to 2442 conditions per place. [2023-01-27 18:00:03,855 INFO L137 encePairwiseOnDemand]: 129/131 looper letters, 45 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2023-01-27 18:00:03,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 52 transitions, 447 flow [2023-01-27 18:00:03,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:03,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:03,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 187 transitions. [2023-01-27 18:00:03,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4758269720101781 [2023-01-27 18:00:03,856 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 187 transitions. [2023-01-27 18:00:03,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 187 transitions. [2023-01-27 18:00:03,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:03,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 187 transitions. [2023-01-27 18:00:03,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:03,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:03,858 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:03,858 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 264 flow. Second operand 3 states and 187 transitions. [2023-01-27 18:00:03,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 52 transitions, 447 flow [2023-01-27 18:00:03,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 52 transitions, 421 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:00:03,867 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 242 flow [2023-01-27 18:00:03,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-01-27 18:00:03,868 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2023-01-27 18:00:03,869 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 242 flow [2023-01-27 18:00:03,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:03,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:03,869 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:03,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-01-27 18:00:03,869 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 18:00:03,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:03,870 INFO L85 PathProgramCache]: Analyzing trace with hash -248126422, now seen corresponding path program 1 times [2023-01-27 18:00:03,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:03,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006640283] [2023-01-27 18:00:03,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:03,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:03,894 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 18:00:03,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:03,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006640283] [2023-01-27 18:00:03,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006640283] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:03,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:03,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:00:03,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165476594] [2023-01-27 18:00:03,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:03,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:00:03,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:03,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:00:03,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:00:03,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-01-27 18:00:03,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:03,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:03,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-01-27 18:00:03,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:04,197 INFO L130 PetriNetUnfolder]: 2132/3676 cut-off events. [2023-01-27 18:00:04,197 INFO L131 PetriNetUnfolder]: For 5429/5429 co-relation queries the response was YES. [2023-01-27 18:00:04,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12139 conditions, 3676 events. 2132/3676 cut-off events. For 5429/5429 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 25943 event pairs, 890 based on Foata normal form. 0/3493 useless extension candidates. Maximal degree in co-relation 6087. Up to 2397 conditions per place. [2023-01-27 18:00:04,221 INFO L137 encePairwiseOnDemand]: 125/131 looper letters, 33 selfloop transitions, 21 changer transitions 0/57 dead transitions. [2023-01-27 18:00:04,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 57 transitions, 490 flow [2023-01-27 18:00:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:04,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:04,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 186 transitions. [2023-01-27 18:00:04,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732824427480916 [2023-01-27 18:00:04,223 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 186 transitions. [2023-01-27 18:00:04,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 186 transitions. [2023-01-27 18:00:04,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:04,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 186 transitions. [2023-01-27 18:00:04,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:04,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:04,225 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:04,225 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 242 flow. Second operand 3 states and 186 transitions. [2023-01-27 18:00:04,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 57 transitions, 490 flow [2023-01-27 18:00:04,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 482 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 18:00:04,229 INFO L231 Difference]: Finished difference. Result has 40 places, 50 transitions, 460 flow [2023-01-27 18:00:04,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=460, PETRI_PLACES=40, PETRI_TRANSITIONS=50} [2023-01-27 18:00:04,230 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 9 predicate places. [2023-01-27 18:00:04,230 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 50 transitions, 460 flow [2023-01-27 18:00:04,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:04,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:04,230 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:04,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-01-27 18:00:04,230 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 18:00:04,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:04,231 INFO L85 PathProgramCache]: Analyzing trace with hash 898018579, now seen corresponding path program 1 times [2023-01-27 18:00:04,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:04,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412749316] [2023-01-27 18:00:04,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:04,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 18:00:04,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:04,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412749316] [2023-01-27 18:00:04,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412749316] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:04,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:04,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:00:04,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734301422] [2023-01-27 18:00:04,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:04,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 18:00:04,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:04,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 18:00:04,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 18:00:04,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-01-27 18:00:04,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 50 transitions, 460 flow. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:04,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:04,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-01-27 18:00:04,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:04,566 INFO L130 PetriNetUnfolder]: 1771/3145 cut-off events. [2023-01-27 18:00:04,566 INFO L131 PetriNetUnfolder]: For 7685/7685 co-relation queries the response was YES. [2023-01-27 18:00:04,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12210 conditions, 3145 events. 1771/3145 cut-off events. For 7685/7685 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 22274 event pairs, 569 based on Foata normal form. 170/3302 useless extension candidates. Maximal degree in co-relation 6082. Up to 1944 conditions per place. [2023-01-27 18:00:04,583 INFO L137 encePairwiseOnDemand]: 129/131 looper letters, 54 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2023-01-27 18:00:04,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 65 transitions, 705 flow [2023-01-27 18:00:04,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:04,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:04,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2023-01-27 18:00:04,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681933842239186 [2023-01-27 18:00:04,584 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2023-01-27 18:00:04,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2023-01-27 18:00:04,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:04,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2023-01-27 18:00:04,584 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) [2023-01-27 18:00:04,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:04,585 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:04,585 INFO L175 Difference]: Start difference. First operand has 40 places, 50 transitions, 460 flow. Second operand 3 states and 184 transitions. [2023-01-27 18:00:04,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 65 transitions, 705 flow [2023-01-27 18:00:04,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 65 transitions, 663 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:00:04,592 INFO L231 Difference]: Finished difference. Result has 39 places, 49 transitions, 430 flow [2023-01-27 18:00:04,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=430, PETRI_PLACES=39, PETRI_TRANSITIONS=49} [2023-01-27 18:00:04,593 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 8 predicate places. [2023-01-27 18:00:04,593 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 49 transitions, 430 flow [2023-01-27 18:00:04,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:04,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:04,593 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:04,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-01-27 18:00:04,593 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 18:00:04,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:04,594 INFO L85 PathProgramCache]: Analyzing trace with hash 2065653506, now seen corresponding path program 1 times [2023-01-27 18:00:04,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:04,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537347661] [2023-01-27 18:00:04,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:04,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 18:00:04,601 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 18:00:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 18:00:04,606 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 18:00:04,607 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 18:00:04,607 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-01-27 18:00:04,607 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-01-27 18:00:04,607 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-01-27 18:00:04,607 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-27 18:00:04,607 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-27 18:00:04,607 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-27 18:00:04,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-01-27 18:00:04,607 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:04,608 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 18:00:04,608 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-27 18:00:04,628 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 18:00:04,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 88 transitions, 221 flow [2023-01-27 18:00:04,641 INFO L130 PetriNetUnfolder]: 6/146 cut-off events. [2023-01-27 18:00:04,642 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-27 18:00:04,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 146 events. 6/146 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 260 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 135. Up to 12 conditions per place. [2023-01-27 18:00:04,642 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 88 transitions, 221 flow [2023-01-27 18:00:04,643 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 88 transitions, 221 flow [2023-01-27 18:00:04,643 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 18:00:04,643 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 88 transitions, 221 flow [2023-01-27 18:00:04,643 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 88 transitions, 221 flow [2023-01-27 18:00:04,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 88 transitions, 221 flow [2023-01-27 18:00:04,653 INFO L130 PetriNetUnfolder]: 6/146 cut-off events. [2023-01-27 18:00:04,653 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-27 18:00:04,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 146 events. 6/146 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 260 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 135. Up to 12 conditions per place. [2023-01-27 18:00:04,656 INFO L119 LiptonReduction]: Number of co-enabled transitions 4070 [2023-01-27 18:00:05,768 INFO L134 LiptonReduction]: Checked pairs total: 5927 [2023-01-27 18:00:05,768 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-01-27 18:00:05,769 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 18:00:05,770 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;@7d2db0b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 18:00:05,770 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-01-27 18:00:05,771 INFO L130 PetriNetUnfolder]: 0/7 cut-off events. [2023-01-27 18:00:05,771 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 18:00:05,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:05,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 18:00:05,771 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-01-27 18:00:05,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:05,771 INFO L85 PathProgramCache]: Analyzing trace with hash 678000492, now seen corresponding path program 1 times [2023-01-27 18:00:05,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:05,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782782029] [2023-01-27 18:00:05,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:05,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:05,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:05,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 18:00:05,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:05,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782782029] [2023-01-27 18:00:05,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782782029] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:05,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:05,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:00:05,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424415818] [2023-01-27 18:00:05,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:05,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:00:05,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:05,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:00:05,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:00:05,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-01-27 18:00:05,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:05,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:05,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-01-27 18:00:05,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:06,754 INFO L130 PetriNetUnfolder]: 12384/17359 cut-off events. [2023-01-27 18:00:06,754 INFO L131 PetriNetUnfolder]: For 8948/8948 co-relation queries the response was YES. [2023-01-27 18:00:06,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37925 conditions, 17359 events. 12384/17359 cut-off events. For 8948/8948 co-relation queries the response was YES. Maximal size of possible extension queue 1150. Compared 107421 event pairs, 6940 based on Foata normal form. 0/12846 useless extension candidates. Maximal degree in co-relation 7783. Up to 11057 conditions per place. [2023-01-27 18:00:06,854 INFO L137 encePairwiseOnDemand]: 143/151 looper letters, 34 selfloop transitions, 6 changer transitions 0/43 dead transitions. [2023-01-27 18:00:06,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 243 flow [2023-01-27 18:00:06,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:06,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:06,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 229 transitions. [2023-01-27 18:00:06,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055187637969095 [2023-01-27 18:00:06,856 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 229 transitions. [2023-01-27 18:00:06,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 229 transitions. [2023-01-27 18:00:06,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:06,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 229 transitions. [2023-01-27 18:00:06,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:06,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:06,858 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:06,858 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 97 flow. Second operand 3 states and 229 transitions. [2023-01-27 18:00:06,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 43 transitions, 243 flow [2023-01-27 18:00:06,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 43 transitions, 211 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-01-27 18:00:06,869 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 121 flow [2023-01-27 18:00:06,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-01-27 18:00:06,869 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2023-01-27 18:00:06,869 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 121 flow [2023-01-27 18:00:06,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:06,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:06,874 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:06,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-01-27 18:00:06,874 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-01-27 18:00:06,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:06,875 INFO L85 PathProgramCache]: Analyzing trace with hash -2026213594, now seen corresponding path program 1 times [2023-01-27 18:00:06,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:06,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961316798] [2023-01-27 18:00:06,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:06,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:06,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 18:00:06,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:06,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961316798] [2023-01-27 18:00:06,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961316798] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:06,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:06,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:00:06,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709154471] [2023-01-27 18:00:06,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:06,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:00:06,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:06,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:00:06,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:00:06,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-01-27 18:00:06,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:06,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:06,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-01-27 18:00:06,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:08,390 INFO L130 PetriNetUnfolder]: 17214/24347 cut-off events. [2023-01-27 18:00:08,390 INFO L131 PetriNetUnfolder]: For 13763/13763 co-relation queries the response was YES. [2023-01-27 18:00:08,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62070 conditions, 24347 events. 17214/24347 cut-off events. For 13763/13763 co-relation queries the response was YES. Maximal size of possible extension queue 1703. Compared 161749 event pairs, 8064 based on Foata normal form. 0/19341 useless extension candidates. Maximal degree in co-relation 29432. Up to 15695 conditions per place. [2023-01-27 18:00:08,514 INFO L137 encePairwiseOnDemand]: 144/151 looper letters, 38 selfloop transitions, 10 changer transitions 0/51 dead transitions. [2023-01-27 18:00:08,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 51 transitions, 304 flow [2023-01-27 18:00:08,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:08,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:08,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2023-01-27 18:00:08,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4988962472406181 [2023-01-27 18:00:08,516 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2023-01-27 18:00:08,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2023-01-27 18:00:08,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:08,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2023-01-27 18:00:08,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:08,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:08,517 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:08,517 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 121 flow. Second operand 3 states and 226 transitions. [2023-01-27 18:00:08,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 51 transitions, 304 flow [2023-01-27 18:00:08,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 51 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:00:08,607 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 197 flow [2023-01-27 18:00:08,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2023-01-27 18:00:08,607 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2023-01-27 18:00:08,607 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 197 flow [2023-01-27 18:00:08,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:08,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:08,608 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:08,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-01-27 18:00:08,608 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-01-27 18:00:08,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:08,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1613796839, now seen corresponding path program 1 times [2023-01-27 18:00:08,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:08,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986887223] [2023-01-27 18:00:08,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:08,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 18:00:08,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:08,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986887223] [2023-01-27 18:00:08,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986887223] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:08,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:08,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:00:08,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412360929] [2023-01-27 18:00:08,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:08,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 18:00:08,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:08,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 18:00:08,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 18:00:08,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-01-27 18:00:08,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 197 flow. Second operand has 4 states, 4 states have (on average 63.75) internal successors, (255), 4 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:08,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:08,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-01-27 18:00:08,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:09,536 INFO L130 PetriNetUnfolder]: 13946/19127 cut-off events. [2023-01-27 18:00:09,537 INFO L131 PetriNetUnfolder]: For 17220/17220 co-relation queries the response was YES. [2023-01-27 18:00:09,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56975 conditions, 19127 events. 13946/19127 cut-off events. For 17220/17220 co-relation queries the response was YES. Maximal size of possible extension queue 1381. Compared 121192 event pairs, 2700 based on Foata normal form. 0/15793 useless extension candidates. Maximal degree in co-relation 56920. Up to 15496 conditions per place. [2023-01-27 18:00:09,623 INFO L137 encePairwiseOnDemand]: 149/151 looper letters, 53 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-01-27 18:00:09,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 58 transitions, 409 flow [2023-01-27 18:00:09,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:09,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:09,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-01-27 18:00:09,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4966887417218543 [2023-01-27 18:00:09,625 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-01-27 18:00:09,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-01-27 18:00:09,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:09,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-01-27 18:00:09,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:09,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:09,626 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:09,626 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 197 flow. Second operand 3 states and 225 transitions. [2023-01-27 18:00:09,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 58 transitions, 409 flow [2023-01-27 18:00:09,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 58 transitions, 379 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:00:09,704 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 177 flow [2023-01-27 18:00:09,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-01-27 18:00:09,705 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-01-27 18:00:09,705 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 177 flow [2023-01-27 18:00:09,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.75) internal successors, (255), 4 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:09,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:09,705 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:09,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-01-27 18:00:09,705 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-01-27 18:00:09,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:09,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1611892188, now seen corresponding path program 1 times [2023-01-27 18:00:09,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:09,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319334076] [2023-01-27 18:00:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:09,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 18:00:09,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:09,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319334076] [2023-01-27 18:00:09,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319334076] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:09,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:09,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:00:09,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048238788] [2023-01-27 18:00:09,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:09,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 18:00:09,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:09,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 18:00:09,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 18:00:09,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-01-27 18:00:09,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 177 flow. Second operand has 4 states, 4 states have (on average 63.75) internal successors, (255), 4 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:09,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:09,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-01-27 18:00:09,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:10,536 INFO L130 PetriNetUnfolder]: 11269/15577 cut-off events. [2023-01-27 18:00:10,536 INFO L131 PetriNetUnfolder]: For 11490/11490 co-relation queries the response was YES. [2023-01-27 18:00:10,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44879 conditions, 15577 events. 11269/15577 cut-off events. For 11490/11490 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 96113 event pairs, 1895 based on Foata normal form. 0/12813 useless extension candidates. Maximal degree in co-relation 23207. Up to 12576 conditions per place. [2023-01-27 18:00:10,614 INFO L137 encePairwiseOnDemand]: 149/151 looper letters, 50 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-01-27 18:00:10,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 364 flow [2023-01-27 18:00:10,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:10,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:10,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-01-27 18:00:10,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4900662251655629 [2023-01-27 18:00:10,616 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-01-27 18:00:10,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-01-27 18:00:10,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:10,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-01-27 18:00:10,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:10,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:10,617 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:10,617 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 177 flow. Second operand 3 states and 222 transitions. [2023-01-27 18:00:10,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 364 flow [2023-01-27 18:00:10,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 361 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 18:00:10,620 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 175 flow [2023-01-27 18:00:10,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2023-01-27 18:00:10,620 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-01-27 18:00:10,621 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 175 flow [2023-01-27 18:00:10,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.75) internal successors, (255), 4 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:10,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:10,621 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:10,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-01-27 18:00:10,621 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-01-27 18:00:10,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:10,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1527139999, now seen corresponding path program 1 times [2023-01-27 18:00:10,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:10,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136935363] [2023-01-27 18:00:10,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:10,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 18:00:10,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:10,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136935363] [2023-01-27 18:00:10,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136935363] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:10,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:10,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:00:10,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788474834] [2023-01-27 18:00:10,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:10,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:00:10,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:10,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:00:10,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:00:10,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-01-27 18:00:10,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:10,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:10,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-01-27 18:00:10,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:11,755 INFO L130 PetriNetUnfolder]: 14850/21601 cut-off events. [2023-01-27 18:00:11,755 INFO L131 PetriNetUnfolder]: For 20184/20184 co-relation queries the response was YES. [2023-01-27 18:00:11,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61589 conditions, 21601 events. 14850/21601 cut-off events. For 20184/20184 co-relation queries the response was YES. Maximal size of possible extension queue 1651. Compared 150024 event pairs, 6228 based on Foata normal form. 0/18162 useless extension candidates. Maximal degree in co-relation 35418. Up to 14235 conditions per place. [2023-01-27 18:00:11,944 INFO L137 encePairwiseOnDemand]: 144/151 looper letters, 40 selfloop transitions, 17 changer transitions 0/60 dead transitions. [2023-01-27 18:00:11,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 60 transitions, 409 flow [2023-01-27 18:00:11,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:11,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:11,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2023-01-27 18:00:11,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878587196467991 [2023-01-27 18:00:11,946 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2023-01-27 18:00:11,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2023-01-27 18:00:11,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:11,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2023-01-27 18:00:11,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:11,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:11,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:11,948 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 175 flow. Second operand 3 states and 221 transitions. [2023-01-27 18:00:11,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 60 transitions, 409 flow [2023-01-27 18:00:11,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 60 transitions, 405 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 18:00:11,954 INFO L231 Difference]: Finished difference. Result has 44 places, 49 transitions, 347 flow [2023-01-27 18:00:11,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=347, PETRI_PLACES=44, PETRI_TRANSITIONS=49} [2023-01-27 18:00:11,954 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 7 predicate places. [2023-01-27 18:00:11,954 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 49 transitions, 347 flow [2023-01-27 18:00:11,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:11,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:11,955 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:11,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-01-27 18:00:11,955 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-01-27 18:00:11,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:11,955 INFO L85 PathProgramCache]: Analyzing trace with hash -96696211, now seen corresponding path program 1 times [2023-01-27 18:00:11,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:11,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554062052] [2023-01-27 18:00:11,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:11,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:12,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 18:00:12,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:12,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554062052] [2023-01-27 18:00:12,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554062052] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:12,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:12,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:00:12,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464580856] [2023-01-27 18:00:12,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:12,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 18:00:12,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:12,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 18:00:12,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 18:00:12,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-01-27 18:00:12,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 49 transitions, 347 flow. Second operand has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:12,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:12,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-01-27 18:00:12,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:13,141 INFO L130 PetriNetUnfolder]: 11925/16849 cut-off events. [2023-01-27 18:00:13,141 INFO L131 PetriNetUnfolder]: For 28615/28615 co-relation queries the response was YES. [2023-01-27 18:00:13,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59534 conditions, 16849 events. 11925/16849 cut-off events. For 28615/28615 co-relation queries the response was YES. Maximal size of possible extension queue 1331. Compared 110411 event pairs, 2241 based on Foata normal form. 954/15750 useless extension candidates. Maximal degree in co-relation 33950. Up to 13484 conditions per place. [2023-01-27 18:00:13,265 INFO L137 encePairwiseOnDemand]: 149/151 looper letters, 64 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2023-01-27 18:00:13,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 71 transitions, 619 flow [2023-01-27 18:00:13,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:13,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:13,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2023-01-27 18:00:13,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48344370860927155 [2023-01-27 18:00:13,266 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 219 transitions. [2023-01-27 18:00:13,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 219 transitions. [2023-01-27 18:00:13,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:13,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 219 transitions. [2023-01-27 18:00:13,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:13,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:13,268 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:13,268 INFO L175 Difference]: Start difference. First operand has 44 places, 49 transitions, 347 flow. Second operand 3 states and 219 transitions. [2023-01-27 18:00:13,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 71 transitions, 619 flow [2023-01-27 18:00:13,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 71 transitions, 585 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:00:13,309 INFO L231 Difference]: Finished difference. Result has 43 places, 48 transitions, 317 flow [2023-01-27 18:00:13,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=317, PETRI_PLACES=43, PETRI_TRANSITIONS=48} [2023-01-27 18:00:13,310 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 6 predicate places. [2023-01-27 18:00:13,310 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 48 transitions, 317 flow [2023-01-27 18:00:13,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:13,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:13,310 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:13,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-01-27 18:00:13,310 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-01-27 18:00:13,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:13,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1896232274, now seen corresponding path program 1 times [2023-01-27 18:00:13,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:13,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711358776] [2023-01-27 18:00:13,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:13,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 18:00:13,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:13,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711358776] [2023-01-27 18:00:13,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711358776] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:13,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:13,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:00:13,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734182746] [2023-01-27 18:00:13,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:13,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:00:13,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:13,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:00:13,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:00:13,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-01-27 18:00:13,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 48 transitions, 317 flow. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:13,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:13,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-01-27 18:00:13,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:14,463 INFO L130 PetriNetUnfolder]: 14852/22111 cut-off events. [2023-01-27 18:00:14,463 INFO L131 PetriNetUnfolder]: For 37417/37417 co-relation queries the response was YES. [2023-01-27 18:00:14,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72697 conditions, 22111 events. 14852/22111 cut-off events. For 37417/37417 co-relation queries the response was YES. Maximal size of possible extension queue 1850. Compared 160692 event pairs, 5610 based on Foata normal form. 0/19811 useless extension candidates. Maximal degree in co-relation 41806. Up to 14769 conditions per place. [2023-01-27 18:00:14,595 INFO L137 encePairwiseOnDemand]: 144/151 looper letters, 47 selfloop transitions, 29 changer transitions 0/79 dead transitions. [2023-01-27 18:00:14,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 79 transitions, 684 flow [2023-01-27 18:00:14,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:14,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:14,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 218 transitions. [2023-01-27 18:00:14,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48123620309050774 [2023-01-27 18:00:14,596 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 218 transitions. [2023-01-27 18:00:14,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 218 transitions. [2023-01-27 18:00:14,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:14,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 218 transitions. [2023-01-27 18:00:14,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:14,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:14,598 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:14,598 INFO L175 Difference]: Start difference. First operand has 43 places, 48 transitions, 317 flow. Second operand 3 states and 218 transitions. [2023-01-27 18:00:14,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 79 transitions, 684 flow [2023-01-27 18:00:14,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 79 transitions, 676 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 18:00:14,612 INFO L231 Difference]: Finished difference. Result has 46 places, 69 transitions, 647 flow [2023-01-27 18:00:14,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=647, PETRI_PLACES=46, PETRI_TRANSITIONS=69} [2023-01-27 18:00:14,613 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 9 predicate places. [2023-01-27 18:00:14,613 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 69 transitions, 647 flow [2023-01-27 18:00:14,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:14,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:14,613 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:14,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-01-27 18:00:14,613 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-01-27 18:00:14,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:14,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1346338571, now seen corresponding path program 1 times [2023-01-27 18:00:14,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:14,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468514655] [2023-01-27 18:00:14,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:14,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:14,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 18:00:14,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:14,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468514655] [2023-01-27 18:00:14,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468514655] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:14,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:14,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:00:14,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553682330] [2023-01-27 18:00:14,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:14,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 18:00:14,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:14,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 18:00:14,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 18:00:14,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-01-27 18:00:14,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 69 transitions, 647 flow. Second operand has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:14,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:14,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-01-27 18:00:14,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:15,578 INFO L130 PetriNetUnfolder]: 11939/17421 cut-off events. [2023-01-27 18:00:15,578 INFO L131 PetriNetUnfolder]: For 46459/46459 co-relation queries the response was YES. [2023-01-27 18:00:15,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69793 conditions, 17421 events. 11939/17421 cut-off events. For 46459/46459 co-relation queries the response was YES. Maximal size of possible extension queue 1494. Compared 121189 event pairs, 2639 based on Foata normal form. 1012/17369 useless extension candidates. Maximal degree in co-relation 39980. Up to 13486 conditions per place. [2023-01-27 18:00:15,681 INFO L137 encePairwiseOnDemand]: 149/151 looper letters, 86 selfloop transitions, 8 changer transitions 0/97 dead transitions. [2023-01-27 18:00:15,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 97 transitions, 1070 flow [2023-01-27 18:00:15,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:15,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:15,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 216 transitions. [2023-01-27 18:00:15,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4768211920529801 [2023-01-27 18:00:15,682 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 216 transitions. [2023-01-27 18:00:15,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 216 transitions. [2023-01-27 18:00:15,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:15,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 216 transitions. [2023-01-27 18:00:15,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:15,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:15,683 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:15,684 INFO L175 Difference]: Start difference. First operand has 46 places, 69 transitions, 647 flow. Second operand 3 states and 216 transitions. [2023-01-27 18:00:15,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 97 transitions, 1070 flow [2023-01-27 18:00:15,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 97 transitions, 1012 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:00:15,734 INFO L231 Difference]: Finished difference. Result has 45 places, 68 transitions, 601 flow [2023-01-27 18:00:15,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=601, PETRI_PLACES=45, PETRI_TRANSITIONS=68} [2023-01-27 18:00:15,734 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 8 predicate places. [2023-01-27 18:00:15,735 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 68 transitions, 601 flow [2023-01-27 18:00:15,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:15,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:15,735 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:15,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-01-27 18:00:15,735 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-01-27 18:00:15,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:15,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1686687131, now seen corresponding path program 1 times [2023-01-27 18:00:15,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:15,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525411376] [2023-01-27 18:00:15,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:15,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:15,754 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-01-27 18:00:15,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:15,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525411376] [2023-01-27 18:00:15,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525411376] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:15,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:15,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:00:15,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314702450] [2023-01-27 18:00:15,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:15,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:00:15,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:15,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:00:15,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:00:15,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-01-27 18:00:15,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 68 transitions, 601 flow. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:15,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:15,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-01-27 18:00:15,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:16,861 INFO L130 PetriNetUnfolder]: 13634/21204 cut-off events. [2023-01-27 18:00:16,862 INFO L131 PetriNetUnfolder]: For 53657/53657 co-relation queries the response was YES. [2023-01-27 18:00:16,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79175 conditions, 21204 events. 13634/21204 cut-off events. For 53657/53657 co-relation queries the response was YES. Maximal size of possible extension queue 1973. Compared 163535 event pairs, 5130 based on Foata normal form. 0/20302 useless extension candidates. Maximal degree in co-relation 42601. Up to 14771 conditions per place. [2023-01-27 18:00:17,005 INFO L137 encePairwiseOnDemand]: 144/151 looper letters, 58 selfloop transitions, 49 changer transitions 0/110 dead transitions. [2023-01-27 18:00:17,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 110 transitions, 1211 flow [2023-01-27 18:00:17,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:17,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:17,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2023-01-27 18:00:17,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4746136865342163 [2023-01-27 18:00:17,006 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2023-01-27 18:00:17,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2023-01-27 18:00:17,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:17,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2023-01-27 18:00:17,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:17,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:17,008 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:17,008 INFO L175 Difference]: Start difference. First operand has 45 places, 68 transitions, 601 flow. Second operand 3 states and 215 transitions. [2023-01-27 18:00:17,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 110 transitions, 1211 flow [2023-01-27 18:00:17,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 110 transitions, 1195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 18:00:17,034 INFO L231 Difference]: Finished difference. Result has 48 places, 101 transitions, 1211 flow [2023-01-27 18:00:17,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1211, PETRI_PLACES=48, PETRI_TRANSITIONS=101} [2023-01-27 18:00:17,041 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 11 predicate places. [2023-01-27 18:00:17,041 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 101 transitions, 1211 flow [2023-01-27 18:00:17,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:17,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:17,046 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:17,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-01-27 18:00:17,046 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-01-27 18:00:17,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:17,047 INFO L85 PathProgramCache]: Analyzing trace with hash -747690667, now seen corresponding path program 1 times [2023-01-27 18:00:17,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:17,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790047735] [2023-01-27 18:00:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:17,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-01-27 18:00:17,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:17,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790047735] [2023-01-27 18:00:17,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790047735] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:17,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:17,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:00:17,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168452359] [2023-01-27 18:00:17,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:17,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 18:00:17,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:17,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 18:00:17,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 18:00:17,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-01-27 18:00:17,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 101 transitions, 1211 flow. Second operand has 4 states, 4 states have (on average 64.5) internal successors, (258), 4 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:17,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:17,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-01-27 18:00:17,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:18,099 INFO L130 PetriNetUnfolder]: 11331/18039 cut-off events. [2023-01-27 18:00:18,099 INFO L131 PetriNetUnfolder]: For 68413/68413 co-relation queries the response was YES. [2023-01-27 18:00:18,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77880 conditions, 18039 events. 11331/18039 cut-off events. For 68413/68413 co-relation queries the response was YES. Maximal size of possible extension queue 1637. Compared 140773 event pairs, 3585 based on Foata normal form. 862/18861 useless extension candidates. Maximal degree in co-relation 42009. Up to 10940 conditions per place. [2023-01-27 18:00:18,224 INFO L137 encePairwiseOnDemand]: 149/151 looper letters, 118 selfloop transitions, 16 changer transitions 0/137 dead transitions. [2023-01-27 18:00:18,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 137 transitions, 1873 flow [2023-01-27 18:00:18,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:18,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:18,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2023-01-27 18:00:18,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47019867549668876 [2023-01-27 18:00:18,225 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 213 transitions. [2023-01-27 18:00:18,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 213 transitions. [2023-01-27 18:00:18,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:18,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 213 transitions. [2023-01-27 18:00:18,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:18,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:18,226 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:18,226 INFO L175 Difference]: Start difference. First operand has 48 places, 101 transitions, 1211 flow. Second operand 3 states and 213 transitions. [2023-01-27 18:00:18,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 137 transitions, 1873 flow [2023-01-27 18:00:18,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 137 transitions, 1775 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:00:18,281 INFO L231 Difference]: Finished difference. Result has 47 places, 100 transitions, 1141 flow [2023-01-27 18:00:18,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1141, PETRI_PLACES=47, PETRI_TRANSITIONS=100} [2023-01-27 18:00:18,282 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 10 predicate places. [2023-01-27 18:00:18,283 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 100 transitions, 1141 flow [2023-01-27 18:00:18,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.5) internal successors, (258), 4 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:18,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:18,283 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:18,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-01-27 18:00:18,284 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-01-27 18:00:18,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:18,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1707278424, now seen corresponding path program 1 times [2023-01-27 18:00:18,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:18,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062554193] [2023-01-27 18:00:18,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:18,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 18:00:18,291 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 18:00:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 18:00:18,297 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 18:00:18,297 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 18:00:18,298 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-01-27 18:00:18,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-01-27 18:00:18,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-01-27 18:00:18,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-01-27 18:00:18,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-01-27 18:00:18,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-01-27 18:00:18,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-01-27 18:00:18,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-01-27 18:00:18,298 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:18,299 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 18:00:18,299 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-01-27 18:00:18,311 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 18:00:18,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 100 transitions, 260 flow [2023-01-27 18:00:18,320 INFO L130 PetriNetUnfolder]: 7/170 cut-off events. [2023-01-27 18:00:18,320 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-01-27 18:00:18,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 170 events. 7/170 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 310 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 165. Up to 14 conditions per place. [2023-01-27 18:00:18,320 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 100 transitions, 260 flow [2023-01-27 18:00:18,321 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 100 transitions, 260 flow [2023-01-27 18:00:18,321 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 18:00:18,321 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 100 transitions, 260 flow [2023-01-27 18:00:18,321 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 100 transitions, 260 flow [2023-01-27 18:00:18,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 100 transitions, 260 flow [2023-01-27 18:00:18,329 INFO L130 PetriNetUnfolder]: 7/170 cut-off events. [2023-01-27 18:00:18,329 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-01-27 18:00:18,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 170 events. 7/170 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 310 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 165. Up to 14 conditions per place. [2023-01-27 18:00:18,332 INFO L119 LiptonReduction]: Number of co-enabled transitions 5676 [2023-01-27 18:00:19,476 INFO L134 LiptonReduction]: Checked pairs total: 8233 [2023-01-27 18:00:19,476 INFO L136 LiptonReduction]: Total number of compositions: 71 [2023-01-27 18:00:19,477 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 18:00:19,477 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;@7d2db0b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 18:00:19,477 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-01-27 18:00:19,478 INFO L130 PetriNetUnfolder]: 0/7 cut-off events. [2023-01-27 18:00:19,478 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 18:00:19,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:19,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 18:00:19,478 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-01-27 18:00:19,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:19,479 INFO L85 PathProgramCache]: Analyzing trace with hash 853582857, now seen corresponding path program 1 times [2023-01-27 18:00:19,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:19,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38120395] [2023-01-27 18:00:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:19,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 18:00:19,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:19,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38120395] [2023-01-27 18:00:19,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38120395] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:19,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:19,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:00:19,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406406254] [2023-01-27 18:00:19,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:19,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:00:19,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:19,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:00:19,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:00:19,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-01-27 18:00:19,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 30 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:19,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:19,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-01-27 18:00:19,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:23,473 INFO L130 PetriNetUnfolder]: 62014/82081 cut-off events. [2023-01-27 18:00:23,473 INFO L131 PetriNetUnfolder]: For 52408/52408 co-relation queries the response was YES. [2023-01-27 18:00:23,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180152 conditions, 82081 events. 62014/82081 cut-off events. For 52408/52408 co-relation queries the response was YES. Maximal size of possible extension queue 4290. Compared 525164 event pairs, 35952 based on Foata normal form. 0/59906 useless extension candidates. Maximal degree in co-relation 38661. Up to 54027 conditions per place. [2023-01-27 18:00:24,067 INFO L137 encePairwiseOnDemand]: 162/171 looper letters, 41 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2023-01-27 18:00:24,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 303 flow [2023-01-27 18:00:24,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:24,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:24,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2023-01-27 18:00:24,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087719298245614 [2023-01-27 18:00:24,068 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2023-01-27 18:00:24,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2023-01-27 18:00:24,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:24,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2023-01-27 18:00:24,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:24,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:24,070 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:24,070 INFO L175 Difference]: Start difference. First operand has 43 places, 30 transitions, 120 flow. Second operand 3 states and 261 transitions. [2023-01-27 18:00:24,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 303 flow [2023-01-27 18:00:24,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 253 flow, removed 25 selfloop flow, removed 0 redundant places. [2023-01-27 18:00:24,120 INFO L231 Difference]: Finished difference. Result has 46 places, 35 transitions, 142 flow [2023-01-27 18:00:24,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=46, PETRI_TRANSITIONS=35} [2023-01-27 18:00:24,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2023-01-27 18:00:24,121 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 35 transitions, 142 flow [2023-01-27 18:00:24,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:24,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:24,121 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:24,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-01-27 18:00:24,121 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-01-27 18:00:24,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:24,121 INFO L85 PathProgramCache]: Analyzing trace with hash -701240531, now seen corresponding path program 1 times [2023-01-27 18:00:24,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:24,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162051802] [2023-01-27 18:00:24,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:24,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 18:00:24,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:24,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162051802] [2023-01-27 18:00:24,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162051802] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:24,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:24,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:00:24,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118154686] [2023-01-27 18:00:24,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:24,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:00:24,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:24,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:00:24,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:00:24,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-01-27 18:00:24,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 35 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:24,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:24,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-01-27 18:00:24,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:30,858 INFO L130 PetriNetUnfolder]: 87642/116859 cut-off events. [2023-01-27 18:00:30,858 INFO L131 PetriNetUnfolder]: For 63799/63799 co-relation queries the response was YES. [2023-01-27 18:00:31,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296134 conditions, 116859 events. 87642/116859 cut-off events. For 63799/63799 co-relation queries the response was YES. Maximal size of possible extension queue 6344. Compared 797094 event pairs, 43070 based on Foata normal form. 0/90803 useless extension candidates. Maximal degree in co-relation 140390. Up to 77979 conditions per place. [2023-01-27 18:00:31,751 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 46 selfloop transitions, 12 changer transitions 0/61 dead transitions. [2023-01-27 18:00:31,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 366 flow [2023-01-27 18:00:31,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:31,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:31,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 258 transitions. [2023-01-27 18:00:31,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029239766081871 [2023-01-27 18:00:31,752 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 258 transitions. [2023-01-27 18:00:31,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 258 transitions. [2023-01-27 18:00:31,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:31,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 258 transitions. [2023-01-27 18:00:31,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:31,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:31,753 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:31,754 INFO L175 Difference]: Start difference. First operand has 46 places, 35 transitions, 142 flow. Second operand 3 states and 258 transitions. [2023-01-27 18:00:31,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 366 flow [2023-01-27 18:00:33,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 61 transitions, 340 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:00:33,419 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 236 flow [2023-01-27 18:00:33,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-01-27 18:00:33,419 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2023-01-27 18:00:33,419 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 236 flow [2023-01-27 18:00:33,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:33,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:33,419 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:33,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-01-27 18:00:33,419 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-01-27 18:00:33,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:33,420 INFO L85 PathProgramCache]: Analyzing trace with hash -261541993, now seen corresponding path program 1 times [2023-01-27 18:00:33,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:33,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098293586] [2023-01-27 18:00:33,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:33,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:33,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 18:00:33,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:33,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098293586] [2023-01-27 18:00:33,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098293586] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:33,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:33,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:00:33,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357794753] [2023-01-27 18:00:33,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:33,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 18:00:33,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:33,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 18:00:33,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 18:00:33,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-01-27 18:00:33,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 236 flow. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:33,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:33,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-01-27 18:00:33,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:38,457 INFO L130 PetriNetUnfolder]: 71236/92293 cut-off events. [2023-01-27 18:00:38,459 INFO L131 PetriNetUnfolder]: For 80427/80427 co-relation queries the response was YES. [2023-01-27 18:00:38,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272367 conditions, 92293 events. 71236/92293 cut-off events. For 80427/80427 co-relation queries the response was YES. Maximal size of possible extension queue 5175. Compared 592847 event pairs, 13780 based on Foata normal form. 0/74045 useless extension candidates. Maximal degree in co-relation 272311. Up to 74462 conditions per place. [2023-01-27 18:00:39,240 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 65 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-01-27 18:00:39,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 70 transitions, 497 flow [2023-01-27 18:00:39,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:39,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:39,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2023-01-27 18:00:39,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5009746588693957 [2023-01-27 18:00:39,242 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2023-01-27 18:00:39,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2023-01-27 18:00:39,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:39,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2023-01-27 18:00:39,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:39,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:39,243 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:39,243 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 236 flow. Second operand 3 states and 257 transitions. [2023-01-27 18:00:39,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 70 transitions, 497 flow [2023-01-27 18:00:40,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 70 transitions, 461 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:00:40,459 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 212 flow [2023-01-27 18:00:40,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2023-01-27 18:00:40,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2023-01-27 18:00:40,459 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 212 flow [2023-01-27 18:00:40,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:40,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:40,460 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:40,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-01-27 18:00:40,460 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-01-27 18:00:40,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:40,460 INFO L85 PathProgramCache]: Analyzing trace with hash -263616779, now seen corresponding path program 1 times [2023-01-27 18:00:40,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:40,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615969309] [2023-01-27 18:00:40,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:40,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 18:00:40,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:40,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615969309] [2023-01-27 18:00:40,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615969309] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:40,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:40,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:00:40,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342201949] [2023-01-27 18:00:40,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:40,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 18:00:40,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:40,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 18:00:40,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 18:00:40,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-01-27 18:00:40,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:40,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:40,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-01-27 18:00:40,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:44,468 INFO L130 PetriNetUnfolder]: 57777/75233 cut-off events. [2023-01-27 18:00:44,468 INFO L131 PetriNetUnfolder]: For 53296/53296 co-relation queries the response was YES. [2023-01-27 18:00:44,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214572 conditions, 75233 events. 57777/75233 cut-off events. For 53296/53296 co-relation queries the response was YES. Maximal size of possible extension queue 4281. Compared 473714 event pairs, 9807 based on Foata normal form. 0/60115 useless extension candidates. Maximal degree in co-relation 113375. Up to 60562 conditions per place. [2023-01-27 18:00:44,912 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 62 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-01-27 18:00:44,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 446 flow [2023-01-27 18:00:44,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:44,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:44,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2023-01-27 18:00:44,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951267056530214 [2023-01-27 18:00:44,913 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 254 transitions. [2023-01-27 18:00:44,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 254 transitions. [2023-01-27 18:00:44,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:44,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 254 transitions. [2023-01-27 18:00:44,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 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) [2023-01-27 18:00:44,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:44,914 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:44,914 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 212 flow. Second operand 3 states and 254 transitions. [2023-01-27 18:00:44,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 446 flow [2023-01-27 18:00:44,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 443 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 18:00:44,926 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 210 flow [2023-01-27 18:00:44,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-01-27 18:00:44,926 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2023-01-27 18:00:44,926 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 210 flow [2023-01-27 18:00:44,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:44,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:44,926 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:44,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-01-27 18:00:44,927 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-01-27 18:00:44,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:44,927 INFO L85 PathProgramCache]: Analyzing trace with hash 2120622272, now seen corresponding path program 1 times [2023-01-27 18:00:44,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:44,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106657709] [2023-01-27 18:00:44,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:44,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:44,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 18:00:44,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:44,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106657709] [2023-01-27 18:00:44,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106657709] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:44,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:44,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:00:44,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862599702] [2023-01-27 18:00:44,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:44,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:00:44,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:44,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:00:44,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:00:44,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-01-27 18:00:44,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 210 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) [2023-01-27 18:00:44,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:44,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-01-27 18:00:44,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:50,860 INFO L130 PetriNetUnfolder]: 78368/106611 cut-off events. [2023-01-27 18:00:50,861 INFO L131 PetriNetUnfolder]: For 99801/99801 co-relation queries the response was YES. [2023-01-27 18:00:51,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301471 conditions, 106611 events. 78368/106611 cut-off events. For 99801/99801 co-relation queries the response was YES. Maximal size of possible extension queue 6232. Compared 759267 event pairs, 34508 based on Foata normal form. 0/87014 useless extension candidates. Maximal degree in co-relation 167263. Up to 72725 conditions per place. [2023-01-27 18:00:51,515 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 50 selfloop transitions, 21 changer transitions 0/74 dead transitions. [2023-01-27 18:00:51,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 507 flow [2023-01-27 18:00:51,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:51,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:51,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 253 transitions. [2023-01-27 18:00:51,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49317738791423 [2023-01-27 18:00:51,517 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 253 transitions. [2023-01-27 18:00:51,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 253 transitions. [2023-01-27 18:00:51,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:51,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 253 transitions. [2023-01-27 18:00:51,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:51,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:51,518 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:51,518 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 210 flow. Second operand 3 states and 253 transitions. [2023-01-27 18:00:51,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 507 flow [2023-01-27 18:00:51,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 74 transitions, 503 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 18:00:51,534 INFO L231 Difference]: Finished difference. Result has 50 places, 60 transitions, 430 flow [2023-01-27 18:00:51,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=430, PETRI_PLACES=50, PETRI_TRANSITIONS=60} [2023-01-27 18:00:51,535 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2023-01-27 18:00:51,535 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 60 transitions, 430 flow [2023-01-27 18:00:51,536 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) [2023-01-27 18:00:51,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:51,536 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:51,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-01-27 18:00:51,536 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-01-27 18:00:51,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:51,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1314784524, now seen corresponding path program 1 times [2023-01-27 18:00:51,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:51,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671188299] [2023-01-27 18:00:51,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:51,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 18:00:51,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:51,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671188299] [2023-01-27 18:00:51,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671188299] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:51,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:51,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:00:51,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878291789] [2023-01-27 18:00:51,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:51,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 18:00:51,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:51,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 18:00:51,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 18:00:51,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-01-27 18:00:51,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 60 transitions, 430 flow. Second operand has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:51,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:51,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-01-27 18:00:51,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:56,514 INFO L130 PetriNetUnfolder]: 63123/83371 cut-off events. [2023-01-27 18:00:56,514 INFO L131 PetriNetUnfolder]: For 140677/140677 co-relation queries the response was YES. [2023-01-27 18:00:56,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290089 conditions, 83371 events. 63123/83371 cut-off events. For 140677/140677 co-relation queries the response was YES. Maximal size of possible extension queue 5044. Compared 555386 event pairs, 11449 based on Foata normal form. 4008/74526 useless extension candidates. Maximal degree in co-relation 157443. Up to 66634 conditions per place. [2023-01-27 18:00:57,074 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 82 selfloop transitions, 4 changer transitions 0/89 dead transitions. [2023-01-27 18:00:57,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 89 transitions, 781 flow [2023-01-27 18:00:57,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:00:57,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:00:57,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2023-01-27 18:00:57,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48927875243664715 [2023-01-27 18:00:57,075 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 251 transitions. [2023-01-27 18:00:57,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 251 transitions. [2023-01-27 18:00:57,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:00:57,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 251 transitions. [2023-01-27 18:00:57,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:57,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:57,077 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:57,077 INFO L175 Difference]: Start difference. First operand has 50 places, 60 transitions, 430 flow. Second operand 3 states and 251 transitions. [2023-01-27 18:00:57,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 89 transitions, 781 flow [2023-01-27 18:00:57,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 89 transitions, 739 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:00:57,400 INFO L231 Difference]: Finished difference. Result has 49 places, 59 transitions, 392 flow [2023-01-27 18:00:57,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=392, PETRI_PLACES=49, PETRI_TRANSITIONS=59} [2023-01-27 18:00:57,400 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2023-01-27 18:00:57,400 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 59 transitions, 392 flow [2023-01-27 18:00:57,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:57,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:57,400 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:57,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-01-27 18:00:57,401 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-01-27 18:00:57,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:57,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1208238642, now seen corresponding path program 1 times [2023-01-27 18:00:57,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:57,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164756053] [2023-01-27 18:00:57,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:57,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 18:00:57,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:57,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164756053] [2023-01-27 18:00:57,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164756053] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:57,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:57,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:00:57,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490727197] [2023-01-27 18:00:57,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:57,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:00:57,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:57,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:00:57,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:00:57,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-01-27 18:00:57,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 59 transitions, 392 flow. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:00:57,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:57,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-01-27 18:00:57,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:01:04,133 INFO L130 PetriNetUnfolder]: 82894/114621 cut-off events. [2023-01-27 18:01:04,134 INFO L131 PetriNetUnfolder]: For 202351/202351 co-relation queries the response was YES. [2023-01-27 18:01:04,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372683 conditions, 114621 events. 82894/114621 cut-off events. For 202351/202351 co-relation queries the response was YES. Maximal size of possible extension queue 7139. Compared 856344 event pairs, 32594 based on Foata normal form. 0/98741 useless extension candidates. Maximal degree in co-relation 216934. Up to 78927 conditions per place. [2023-01-27 18:01:04,924 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 61 selfloop transitions, 37 changer transitions 0/101 dead transitions. [2023-01-27 18:01:04,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 101 transitions, 878 flow [2023-01-27 18:01:04,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:01:04,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:01:04,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 250 transitions. [2023-01-27 18:01:04,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4873294346978557 [2023-01-27 18:01:04,926 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 250 transitions. [2023-01-27 18:01:04,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 250 transitions. [2023-01-27 18:01:04,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:01:04,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 250 transitions. [2023-01-27 18:01:04,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:04,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:04,927 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:04,927 INFO L175 Difference]: Start difference. First operand has 49 places, 59 transitions, 392 flow. Second operand 3 states and 250 transitions. [2023-01-27 18:01:04,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 101 transitions, 878 flow [2023-01-27 18:01:04,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 101 transitions, 870 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 18:01:04,984 INFO L231 Difference]: Finished difference. Result has 52 places, 88 transitions, 834 flow [2023-01-27 18:01:04,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=834, PETRI_PLACES=52, PETRI_TRANSITIONS=88} [2023-01-27 18:01:04,984 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2023-01-27 18:01:04,984 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 88 transitions, 834 flow [2023-01-27 18:01:04,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:04,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:01:04,985 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:01:04,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-01-27 18:01:04,985 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-01-27 18:01:04,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:01:04,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1199311655, now seen corresponding path program 1 times [2023-01-27 18:01:04,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:01:04,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307869650] [2023-01-27 18:01:04,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:01:04,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:01:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:01:05,013 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 18:01:05,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:01:05,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307869650] [2023-01-27 18:01:05,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307869650] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:01:05,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:01:05,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:01:05,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558007371] [2023-01-27 18:01:05,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:01:05,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 18:01:05,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:01:05,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 18:01:05,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 18:01:05,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-01-27 18:01:05,015 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 88 transitions, 834 flow. Second operand has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:05,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:01:05,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-01-27 18:01:05,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:01:10,709 INFO L130 PetriNetUnfolder]: 66491/89377 cut-off events. [2023-01-27 18:01:10,709 INFO L131 PetriNetUnfolder]: For 243725/243725 co-relation queries the response was YES. [2023-01-27 18:01:10,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353392 conditions, 89377 events. 66491/89377 cut-off events. For 243725/243725 co-relation queries the response was YES. Maximal size of possible extension queue 5781. Compared 627164 event pairs, 13367 based on Foata normal form. 4542/84597 useless extension candidates. Maximal degree in co-relation 208656. Up to 70760 conditions per place. [2023-01-27 18:01:11,385 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 117 selfloop transitions, 8 changer transitions 0/128 dead transitions. [2023-01-27 18:01:11,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 128 transitions, 1420 flow [2023-01-27 18:01:11,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:01:11,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:01:11,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2023-01-27 18:01:11,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4834307992202729 [2023-01-27 18:01:11,390 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 248 transitions. [2023-01-27 18:01:11,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 248 transitions. [2023-01-27 18:01:11,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:01:11,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 248 transitions. [2023-01-27 18:01:11,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:11,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:11,392 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:11,392 INFO L175 Difference]: Start difference. First operand has 52 places, 88 transitions, 834 flow. Second operand 3 states and 248 transitions. [2023-01-27 18:01:11,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 128 transitions, 1420 flow [2023-01-27 18:01:11,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 128 transitions, 1346 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:01:11,900 INFO L231 Difference]: Finished difference. Result has 51 places, 87 transitions, 772 flow [2023-01-27 18:01:11,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=772, PETRI_PLACES=51, PETRI_TRANSITIONS=87} [2023-01-27 18:01:11,900 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2023-01-27 18:01:11,901 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 87 transitions, 772 flow [2023-01-27 18:01:11,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:11,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:01:11,901 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:01:11,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-01-27 18:01:11,901 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-01-27 18:01:11,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:01:11,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1049528128, now seen corresponding path program 1 times [2023-01-27 18:01:11,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:01:11,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745100173] [2023-01-27 18:01:11,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:01:11,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:01:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:01:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-01-27 18:01:11,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:01:11,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745100173] [2023-01-27 18:01:11,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745100173] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:01:11,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:01:11,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:01:11,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800301079] [2023-01-27 18:01:11,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:01:11,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:01:11,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:01:11,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:01:11,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:01:11,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-01-27 18:01:11,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 87 transitions, 772 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:11,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:01:11,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-01-27 18:01:11,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:01:19,380 INFO L130 PetriNetUnfolder]: 83744/117939 cut-off events. [2023-01-27 18:01:19,381 INFO L131 PetriNetUnfolder]: For 338138/338138 co-relation queries the response was YES. [2023-01-27 18:01:19,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437267 conditions, 117939 events. 83744/117939 cut-off events. For 338138/338138 co-relation queries the response was YES. Maximal size of possible extension queue 7940. Compared 918723 event pairs, 30074 based on Foata normal form. 0/107390 useless extension candidates. Maximal degree in co-relation 245905. Up to 82253 conditions per place. [2023-01-27 18:01:20,319 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 80 selfloop transitions, 65 changer transitions 0/148 dead transitions. [2023-01-27 18:01:20,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 148 transitions, 1629 flow [2023-01-27 18:01:20,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:01:20,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:01:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2023-01-27 18:01:20,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-01-27 18:01:20,322 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2023-01-27 18:01:20,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2023-01-27 18:01:20,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:01:20,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2023-01-27 18:01:20,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:20,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:20,323 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:20,323 INFO L175 Difference]: Start difference. First operand has 51 places, 87 transitions, 772 flow. Second operand 3 states and 247 transitions. [2023-01-27 18:01:20,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 148 transitions, 1629 flow [2023-01-27 18:01:20,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 148 transitions, 1613 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 18:01:20,524 INFO L231 Difference]: Finished difference. Result has 54 places, 136 transitions, 1638 flow [2023-01-27 18:01:20,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1638, PETRI_PLACES=54, PETRI_TRANSITIONS=136} [2023-01-27 18:01:20,525 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2023-01-27 18:01:20,525 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 136 transitions, 1638 flow [2023-01-27 18:01:20,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:20,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:01:20,525 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:01:20,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-01-27 18:01:20,525 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-01-27 18:01:20,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:01:20,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1824370623, now seen corresponding path program 1 times [2023-01-27 18:01:20,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:01:20,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502216002] [2023-01-27 18:01:20,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:01:20,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:01:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:01:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-01-27 18:01:20,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:01:20,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502216002] [2023-01-27 18:01:20,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502216002] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:01:20,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:01:20,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:01:20,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034382019] [2023-01-27 18:01:20,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:01:20,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 18:01:20,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:01:20,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 18:01:20,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 18:01:20,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-01-27 18:01:20,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 136 transitions, 1638 flow. Second operand has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:20,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:01:20,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-01-27 18:01:20,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:01:27,150 INFO L130 PetriNetUnfolder]: 67349/92869 cut-off events. [2023-01-27 18:01:27,150 INFO L131 PetriNetUnfolder]: For 378525/378525 co-relation queries the response was YES. [2023-01-27 18:01:27,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412575 conditions, 92869 events. 67349/92869 cut-off events. For 378525/378525 co-relation queries the response was YES. Maximal size of possible extension queue 6428. Compared 687339 event pairs, 15691 based on Foata normal form. 4796/92936 useless extension candidates. Maximal degree in co-relation 225959. Up to 70802 conditions per place. [2023-01-27 18:01:27,839 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 175 selfloop transitions, 16 changer transitions 0/194 dead transitions. [2023-01-27 18:01:27,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 194 transitions, 2657 flow [2023-01-27 18:01:27,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:01:27,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:01:27,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2023-01-27 18:01:27,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4775828460038986 [2023-01-27 18:01:27,840 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 245 transitions. [2023-01-27 18:01:27,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 245 transitions. [2023-01-27 18:01:27,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:01:27,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 245 transitions. [2023-01-27 18:01:27,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:27,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:27,847 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:27,847 INFO L175 Difference]: Start difference. First operand has 54 places, 136 transitions, 1638 flow. Second operand 3 states and 245 transitions. [2023-01-27 18:01:27,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 194 transitions, 2657 flow [2023-01-27 18:01:28,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 194 transitions, 2527 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:01:28,626 INFO L231 Difference]: Finished difference. Result has 53 places, 135 transitions, 1536 flow [2023-01-27 18:01:28,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1536, PETRI_PLACES=53, PETRI_TRANSITIONS=135} [2023-01-27 18:01:28,627 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2023-01-27 18:01:28,627 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 135 transitions, 1536 flow [2023-01-27 18:01:28,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:28,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:01:28,627 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:01:28,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-01-27 18:01:28,627 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-01-27 18:01:28,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:01:28,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1427917098, now seen corresponding path program 1 times [2023-01-27 18:01:28,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:01:28,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445522276] [2023-01-27 18:01:28,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:01:28,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:01:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:01:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-01-27 18:01:28,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:01:28,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445522276] [2023-01-27 18:01:28,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445522276] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:01:28,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:01:28,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:01:28,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148516254] [2023-01-27 18:01:28,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:01:28,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:01:28,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:01:28,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:01:28,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:01:28,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-01-27 18:01:28,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 135 transitions, 1536 flow. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:28,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:01:28,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-01-27 18:01:28,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:01:37,162 INFO L130 PetriNetUnfolder]: 78886/114494 cut-off events. [2023-01-27 18:01:37,162 INFO L131 PetriNetUnfolder]: For 460187/460187 co-relation queries the response was YES. [2023-01-27 18:01:37,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 478503 conditions, 114494 events. 78886/114494 cut-off events. For 460187/460187 co-relation queries the response was YES. Maximal size of possible extension queue 8549. Compared 939167 event pairs, 27980 based on Foata normal form. 0/110251 useless extension candidates. Maximal degree in co-relation 272772. Up to 83371 conditions per place. [2023-01-27 18:01:38,291 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 111 selfloop transitions, 113 changer transitions 0/227 dead transitions. [2023-01-27 18:01:38,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 227 transitions, 3084 flow [2023-01-27 18:01:38,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:01:38,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:01:38,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 244 transitions. [2023-01-27 18:01:38,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4756335282651072 [2023-01-27 18:01:38,292 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 244 transitions. [2023-01-27 18:01:38,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 244 transitions. [2023-01-27 18:01:38,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:01:38,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 244 transitions. [2023-01-27 18:01:38,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:38,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:38,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:38,293 INFO L175 Difference]: Start difference. First operand has 53 places, 135 transitions, 1536 flow. Second operand 3 states and 244 transitions. [2023-01-27 18:01:38,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 227 transitions, 3084 flow [2023-01-27 18:01:38,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 227 transitions, 3052 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 18:01:38,794 INFO L231 Difference]: Finished difference. Result has 56 places, 216 transitions, 3178 flow [2023-01-27 18:01:38,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3178, PETRI_PLACES=56, PETRI_TRANSITIONS=216} [2023-01-27 18:01:38,795 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2023-01-27 18:01:38,795 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 216 transitions, 3178 flow [2023-01-27 18:01:38,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:38,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:01:38,795 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:01:38,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-01-27 18:01:38,795 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-01-27 18:01:38,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:01:38,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1315761961, now seen corresponding path program 1 times [2023-01-27 18:01:38,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:01:38,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165280871] [2023-01-27 18:01:38,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:01:38,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:01:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:01:38,819 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-01-27 18:01:38,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:01:38,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165280871] [2023-01-27 18:01:38,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165280871] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:01:38,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:01:38,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:01:38,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709435924] [2023-01-27 18:01:38,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:01:38,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 18:01:38,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:01:38,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 18:01:38,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 18:01:38,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-01-27 18:01:38,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 216 transitions, 3178 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:38,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:01:38,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-01-27 18:01:38,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:01:46,265 INFO L130 PetriNetUnfolder]: 65645/97131 cut-off events. [2023-01-27 18:01:46,265 INFO L131 PetriNetUnfolder]: For 544589/544589 co-relation queries the response was YES. [2023-01-27 18:01:46,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463006 conditions, 97131 events. 65645/97131 cut-off events. For 544589/544589 co-relation queries the response was YES. Maximal size of possible extension queue 7103. Compared 809606 event pairs, 20879 based on Foata normal form. 4122/101132 useless extension candidates. Maximal degree in co-relation 264226. Up to 58024 conditions per place. [2023-01-27 18:01:47,197 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 266 selfloop transitions, 32 changer transitions 0/301 dead transitions. [2023-01-27 18:01:47,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 301 transitions, 4937 flow [2023-01-27 18:01:47,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:01:47,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:01:47,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2023-01-27 18:01:47,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47173489278752434 [2023-01-27 18:01:47,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2023-01-27 18:01:47,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2023-01-27 18:01:47,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:01:47,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2023-01-27 18:01:47,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:47,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:47,199 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:47,199 INFO L175 Difference]: Start difference. First operand has 56 places, 216 transitions, 3178 flow. Second operand 3 states and 242 transitions. [2023-01-27 18:01:47,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 301 transitions, 4937 flow [2023-01-27 18:01:47,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 301 transitions, 4711 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:01:47,829 INFO L231 Difference]: Finished difference. Result has 55 places, 215 transitions, 3012 flow [2023-01-27 18:01:47,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=2948, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3012, PETRI_PLACES=55, PETRI_TRANSITIONS=215} [2023-01-27 18:01:47,829 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2023-01-27 18:01:47,830 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 215 transitions, 3012 flow [2023-01-27 18:01:47,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:47,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:01:47,830 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:01:47,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-01-27 18:01:47,830 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-01-27 18:01:47,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:01:47,830 INFO L85 PathProgramCache]: Analyzing trace with hash 2129659553, now seen corresponding path program 1 times [2023-01-27 18:01:47,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:01:47,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961724211] [2023-01-27 18:01:47,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:01:47,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:01:47,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 18:01:47,849 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 18:01:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 18:01:47,884 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 18:01:47,884 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 18:01:47,884 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-01-27 18:01:47,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-01-27 18:01:47,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2023-01-27 18:01:47,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-01-27 18:01:47,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-01-27 18:01:47,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-01-27 18:01:47,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-01-27 18:01:47,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-01-27 18:01:47,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-01-27 18:01:47,886 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:01:47,888 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 18:01:47,888 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-01-27 18:01:47,904 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 18:01:47,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 112 transitions, 301 flow [2023-01-27 18:01:47,915 INFO L130 PetriNetUnfolder]: 8/194 cut-off events. [2023-01-27 18:01:47,915 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-01-27 18:01:47,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 194 events. 8/194 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 386 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 197. Up to 16 conditions per place. [2023-01-27 18:01:47,916 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 112 transitions, 301 flow [2023-01-27 18:01:47,916 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 112 transitions, 301 flow [2023-01-27 18:01:47,916 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 18:01:47,916 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 112 transitions, 301 flow [2023-01-27 18:01:47,917 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 112 transitions, 301 flow [2023-01-27 18:01:47,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 112 transitions, 301 flow [2023-01-27 18:01:47,925 INFO L130 PetriNetUnfolder]: 8/194 cut-off events. [2023-01-27 18:01:47,925 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-01-27 18:01:47,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 194 events. 8/194 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 386 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 197. Up to 16 conditions per place. [2023-01-27 18:01:47,929 INFO L119 LiptonReduction]: Number of co-enabled transitions 7546 [2023-01-27 18:01:49,140 INFO L134 LiptonReduction]: Checked pairs total: 12943 [2023-01-27 18:01:49,140 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-01-27 18:01:49,141 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 18:01:49,141 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;@7d2db0b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 18:01:49,141 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-01-27 18:01:49,142 INFO L130 PetriNetUnfolder]: 0/7 cut-off events. [2023-01-27 18:01:49,142 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 18:01:49,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:01:49,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 18:01:49,142 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-01-27 18:01:49,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:01:49,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1047119421, now seen corresponding path program 1 times [2023-01-27 18:01:49,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:01:49,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181710729] [2023-01-27 18:01:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:01:49,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:01:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:01:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 18:01:49,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:01:49,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181710729] [2023-01-27 18:01:49,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181710729] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:01:49,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:01:49,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:01:49,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850709596] [2023-01-27 18:01:49,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:01:49,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:01:49,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:01:49,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:01:49,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:01:49,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-01-27 18:01:49,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 34 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:01:49,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:01:49,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-01-27 18:01:49,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:02:08,011 INFO L130 PetriNetUnfolder]: 297494/377965 cut-off events. [2023-01-27 18:02:08,012 INFO L131 PetriNetUnfolder]: For 287847/287847 co-relation queries the response was YES. [2023-01-27 18:02:08,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 832316 conditions, 377965 events. 297494/377965 cut-off events. For 287847/287847 co-relation queries the response was YES. Maximal size of possible extension queue 16101. Compared 2473201 event pairs, 176580 based on Foata normal form. 0/272848 useless extension candidates. Maximal degree in co-relation 183188. Up to 254687 conditions per place. [2023-01-27 18:02:10,482 INFO L137 encePairwiseOnDemand]: 181/191 looper letters, 48 selfloop transitions, 8 changer transitions 0/59 dead transitions. [2023-01-27 18:02:10,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 59 transitions, 367 flow [2023-01-27 18:02:10,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:02:10,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:02:10,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 293 transitions. [2023-01-27 18:02:10,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113438045375218 [2023-01-27 18:02:10,483 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 293 transitions. [2023-01-27 18:02:10,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 293 transitions. [2023-01-27 18:02:10,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:02:10,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 293 transitions. [2023-01-27 18:02:10,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:02:10,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:02:10,484 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:02:10,484 INFO L175 Difference]: Start difference. First operand has 49 places, 34 transitions, 145 flow. Second operand 3 states and 293 transitions. [2023-01-27 18:02:10,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 59 transitions, 367 flow [2023-01-27 18:02:10,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 295 flow, removed 36 selfloop flow, removed 0 redundant places. [2023-01-27 18:02:10,655 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 163 flow [2023-01-27 18:02:10,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2023-01-27 18:02:10,655 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-01-27 18:02:10,655 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 163 flow [2023-01-27 18:02:10,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:02:10,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:02:10,655 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:02:10,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-01-27 18:02:10,656 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-01-27 18:02:10,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:02:10,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1309768385, now seen corresponding path program 1 times [2023-01-27 18:02:10,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:02:10,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192925233] [2023-01-27 18:02:10,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:02:10,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:02:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:02:10,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 18:02:10,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:02:10,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192925233] [2023-01-27 18:02:10,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192925233] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:02:10,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:02:10,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:02:10,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982188010] [2023-01-27 18:02:10,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:02:10,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:02:10,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:02:10,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:02:10,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:02:10,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-01-27 18:02:10,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:02:10,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:02:10,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-01-27 18:02:10,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:02:42,905 INFO L130 PetriNetUnfolder]: 423576/541309 cut-off events. [2023-01-27 18:02:42,905 INFO L131 PetriNetUnfolder]: For 286495/286495 co-relation queries the response was YES. [2023-01-27 18:02:44,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1365244 conditions, 541309 events. 423576/541309 cut-off events. For 286495/286495 co-relation queries the response was YES. Maximal size of possible extension queue 23989. Compared 3735900 event pairs, 215810 based on Foata normal form. 0/413115 useless extension candidates. Maximal degree in co-relation 647466. Up to 370121 conditions per place. [2023-01-27 18:02:47,542 INFO L137 encePairwiseOnDemand]: 182/191 looper letters, 54 selfloop transitions, 14 changer transitions 0/71 dead transitions. [2023-01-27 18:02:47,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 428 flow [2023-01-27 18:02:47,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:02:47,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:02:47,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2023-01-27 18:02:47,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.506108202443281 [2023-01-27 18:02:47,544 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2023-01-27 18:02:47,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2023-01-27 18:02:47,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:02:47,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2023-01-27 18:02:47,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:02:47,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:02:47,562 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:02:47,562 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 163 flow. Second operand 3 states and 290 transitions. [2023-01-27 18:02:47,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 428 flow [2023-01-27 18:03:51,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 71 transitions, 398 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:03:51,946 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 275 flow [2023-01-27 18:03:51,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=275, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2023-01-27 18:03:51,946 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 5 predicate places. [2023-01-27 18:03:51,946 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 275 flow [2023-01-27 18:03:51,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:03:51,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:03:51,946 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:03:51,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-01-27 18:03:51,947 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-01-27 18:03:51,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:03:51,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1945745256, now seen corresponding path program 1 times [2023-01-27 18:03:51,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:03:51,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740734094] [2023-01-27 18:03:51,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:03:51,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:03:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:03:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 18:03:51,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:03:51,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740734094] [2023-01-27 18:03:51,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740734094] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:03:51,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:03:51,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:03:51,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669805226] [2023-01-27 18:03:51,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:03:51,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 18:03:51,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:03:51,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 18:03:51,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 18:03:51,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-01-27 18:03:51,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 275 flow. Second operand has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:03:51,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:03:51,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-01-27 18:03:51,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:04:16,852 INFO L130 PetriNetUnfolder]: 345272/429917 cut-off events. [2023-01-27 18:04:16,853 INFO L131 PetriNetUnfolder]: For 362722/362722 co-relation queries the response was YES. [2023-01-27 18:04:18,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1258871 conditions, 429917 events. 345272/429917 cut-off events. For 362722/362722 co-relation queries the response was YES. Maximal size of possible extension queue 19479. Compared 2779549 event pairs, 66448 based on Foata normal form. 0/337171 useless extension candidates. Maximal degree in co-relation 1258814. Up to 345956 conditions per place. [2023-01-27 18:04:20,135 INFO L137 encePairwiseOnDemand]: 189/191 looper letters, 77 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-01-27 18:04:20,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 82 transitions, 585 flow [2023-01-27 18:04:20,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:04:20,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:04:20,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 289 transitions. [2023-01-27 18:04:20,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043630017452007 [2023-01-27 18:04:20,136 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 289 transitions. [2023-01-27 18:04:20,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 289 transitions. [2023-01-27 18:04:20,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:04:20,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 289 transitions. [2023-01-27 18:04:20,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:04:20,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:04:20,138 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:04:20,138 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 275 flow. Second operand 3 states and 289 transitions. [2023-01-27 18:04:20,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 82 transitions, 585 flow [2023-01-27 18:05:10,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 82 transitions, 543 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:05:10,339 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 247 flow [2023-01-27 18:05:10,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=247, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2023-01-27 18:05:10,340 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2023-01-27 18:05:10,340 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 247 flow [2023-01-27 18:05:10,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:05:10,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:05:10,340 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:05:10,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-01-27 18:05:10,340 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-01-27 18:05:10,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:05:10,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1948110235, now seen corresponding path program 1 times [2023-01-27 18:05:10,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:05:10,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953025507] [2023-01-27 18:05:10,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:05:10,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:05:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:05:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 18:05:10,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:05:10,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953025507] [2023-01-27 18:05:10,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953025507] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:05:10,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:05:10,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:05:10,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354223249] [2023-01-27 18:05:10,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:05:10,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 18:05:10,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:05:10,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 18:05:10,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 18:05:10,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-01-27 18:05:10,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 247 flow. Second operand has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:05:10,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:05:10,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-01-27 18:05:10,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:05:30,391 INFO L130 PetriNetUnfolder]: 280909/351017 cut-off events. [2023-01-27 18:05:30,391 INFO L131 PetriNetUnfolder]: For 239234/239234 co-relation queries the response was YES. [2023-01-27 18:05:31,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 992745 conditions, 351017 events. 280909/351017 cut-off events. For 239234/239234 co-relation queries the response was YES. Maximal size of possible extension queue 16167. Compared 2229218 event pairs, 48119 based on Foata normal form. 0/274201 useless extension candidates. Maximal degree in co-relation 532135. Up to 281912 conditions per place. [2023-01-27 18:05:33,204 INFO L137 encePairwiseOnDemand]: 189/191 looper letters, 74 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-01-27 18:05:33,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 79 transitions, 528 flow [2023-01-27 18:05:33,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:05:33,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:05:33,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 286 transitions. [2023-01-27 18:05:33,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49912739965095987 [2023-01-27 18:05:33,205 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 286 transitions. [2023-01-27 18:05:33,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 286 transitions. [2023-01-27 18:05:33,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:05:33,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 286 transitions. [2023-01-27 18:05:33,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:05:33,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:05:33,207 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:05:33,207 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 247 flow. Second operand 3 states and 286 transitions. [2023-01-27 18:05:33,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 79 transitions, 528 flow [2023-01-27 18:05:33,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 525 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 18:05:33,253 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 245 flow [2023-01-27 18:05:33,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=245, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2023-01-27 18:05:33,253 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2023-01-27 18:05:33,253 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 245 flow [2023-01-27 18:05:33,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:05:33,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:05:33,253 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-01-27 18:05:33,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-01-27 18:05:33,254 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-01-27 18:05:33,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:05:33,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1211223203, now seen corresponding path program 1 times [2023-01-27 18:05:33,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:05:33,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571560922] [2023-01-27 18:05:33,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:05:33,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:05:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:05:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 18:05:33,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:05:33,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571560922] [2023-01-27 18:05:33,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571560922] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:05:33,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:05:33,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:05:33,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944018775] [2023-01-27 18:05:33,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:05:33,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:05:33,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:05:33,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:05:33,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:05:33,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-01-27 18:05:33,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 245 flow. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:05:33,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:05:33,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-01-27 18:05:33,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:06:03,368 INFO L130 PetriNetUnfolder]: 385656/500287 cut-off events. [2023-01-27 18:06:03,369 INFO L131 PetriNetUnfolder]: For 463772/463772 co-relation queries the response was YES. [2023-01-27 18:06:04,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1404945 conditions, 500287 events. 385656/500287 cut-off events. For 463772/463772 co-relation queries the response was YES. Maximal size of possible extension queue 23419. Compared 3597143 event pairs, 176836 based on Foata normal form. 0/398680 useless extension candidates. Maximal degree in co-relation 759541. Up to 349769 conditions per place. [2023-01-27 18:06:07,337 INFO L137 encePairwiseOnDemand]: 182/191 looper letters, 60 selfloop transitions, 25 changer transitions 0/88 dead transitions. [2023-01-27 18:06:07,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 88 transitions, 605 flow [2023-01-27 18:06:07,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:06:07,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:06:07,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2023-01-27 18:06:07,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973821989528796 [2023-01-27 18:06:07,338 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 285 transitions. [2023-01-27 18:06:07,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 285 transitions. [2023-01-27 18:06:07,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:06:07,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 285 transitions. [2023-01-27 18:06:07,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:06:07,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:06:07,340 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:06:07,340 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 245 flow. Second operand 3 states and 285 transitions. [2023-01-27 18:06:07,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 88 transitions, 605 flow [2023-01-27 18:06:09,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 88 transitions, 601 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 18:06:09,149 INFO L231 Difference]: Finished difference. Result has 56 places, 71 transitions, 513 flow [2023-01-27 18:06:09,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=513, PETRI_PLACES=56, PETRI_TRANSITIONS=71} [2023-01-27 18:06:09,150 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2023-01-27 18:06:09,150 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 71 transitions, 513 flow [2023-01-27 18:06:09,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:06:09,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:06:09,150 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:06:09,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-01-27 18:06:09,150 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-01-27 18:06:09,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:06:09,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1106781706, now seen corresponding path program 1 times [2023-01-27 18:06:09,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:06:09,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761386813] [2023-01-27 18:06:09,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:06:09,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:06:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:06:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 18:06:09,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:06:09,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761386813] [2023-01-27 18:06:09,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761386813] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:06:09,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:06:09,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:06:09,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907701172] [2023-01-27 18:06:09,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:06:09,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 18:06:09,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:06:09,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 18:06:09,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 18:06:09,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-01-27 18:06:09,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 71 transitions, 513 flow. Second operand has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:06:09,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:06:09,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-01-27 18:06:09,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:06:35,181 INFO L130 PetriNetUnfolder]: 311645/393393 cut-off events. [2023-01-27 18:06:35,182 INFO L131 PetriNetUnfolder]: For 652015/652015 co-relation queries the response was YES. [2023-01-27 18:06:36,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1350528 conditions, 393393 events. 311645/393393 cut-off events. For 652015/652015 co-relation queries the response was YES. Maximal size of possible extension queue 19046. Compared 2620483 event pairs, 55633 based on Foata normal form. 16278/339366 useless extension candidates. Maximal degree in co-relation 675481. Up to 313668 conditions per place. [2023-01-27 18:06:38,845 INFO L137 encePairwiseOnDemand]: 189/191 looper letters, 100 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2023-01-27 18:06:38,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 107 transitions, 943 flow [2023-01-27 18:06:38,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:06:38,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:06:38,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2023-01-27 18:06:38,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.493891797556719 [2023-01-27 18:06:38,846 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2023-01-27 18:06:38,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2023-01-27 18:06:38,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:06:38,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2023-01-27 18:06:38,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:06:38,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:06:38,847 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:06:38,847 INFO L175 Difference]: Start difference. First operand has 56 places, 71 transitions, 513 flow. Second operand 3 states and 283 transitions. [2023-01-27 18:06:38,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 107 transitions, 943 flow [2023-01-27 18:06:50,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 107 transitions, 893 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:06:50,383 INFO L231 Difference]: Finished difference. Result has 55 places, 70 transitions, 467 flow [2023-01-27 18:06:50,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=467, PETRI_PLACES=55, PETRI_TRANSITIONS=70} [2023-01-27 18:06:50,383 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 6 predicate places. [2023-01-27 18:06:50,383 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 70 transitions, 467 flow [2023-01-27 18:06:50,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:06:50,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:06:50,383 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:06:50,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2023-01-27 18:06:50,384 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-01-27 18:06:50,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:06:50,384 INFO L85 PathProgramCache]: Analyzing trace with hash -112241581, now seen corresponding path program 1 times [2023-01-27 18:06:50,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:06:50,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220910059] [2023-01-27 18:06:50,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:06:50,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:06:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:06:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 18:06:50,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:06:50,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220910059] [2023-01-27 18:06:50,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220910059] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:06:50,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:06:50,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:06:50,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075124006] [2023-01-27 18:06:50,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:06:50,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:06:50,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:06:50,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:06:50,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:06:50,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-01-27 18:06:50,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 70 transitions, 467 flow. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:06:50,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:06:50,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-01-27 18:06:50,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:07:25,700 INFO L130 PetriNetUnfolder]: 417794/548677 cut-off events. [2023-01-27 18:07:25,700 INFO L131 PetriNetUnfolder]: For 983585/983585 co-relation queries the response was YES. [2023-01-27 18:07:27,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1767727 conditions, 548677 events. 417794/548677 cut-off events. For 983585/983585 co-relation queries the response was YES. Maximal size of possible extension queue 26916. Compared 4121705 event pairs, 172730 based on Foata normal form. 0/458425 useless extension candidates. Maximal degree in co-relation 983136. Up to 387351 conditions per place. [2023-01-27 18:07:29,905 INFO L137 encePairwiseOnDemand]: 182/191 looper letters, 75 selfloop transitions, 45 changer transitions 0/123 dead transitions. [2023-01-27 18:07:29,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 123 transitions, 1072 flow [2023-01-27 18:07:29,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:07:29,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:07:29,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2023-01-27 18:07:29,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49214659685863876 [2023-01-27 18:07:29,906 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 282 transitions. [2023-01-27 18:07:29,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 282 transitions. [2023-01-27 18:07:29,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:07:29,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 282 transitions. [2023-01-27 18:07:29,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:07:29,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:07:29,907 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:07:29,908 INFO L175 Difference]: Start difference. First operand has 55 places, 70 transitions, 467 flow. Second operand 3 states and 282 transitions. [2023-01-27 18:07:29,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 123 transitions, 1072 flow [2023-01-27 18:07:30,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 123 transitions, 1064 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 18:07:30,710 INFO L231 Difference]: Finished difference. Result has 58 places, 107 transitions, 1021 flow [2023-01-27 18:07:30,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1021, PETRI_PLACES=58, PETRI_TRANSITIONS=107} [2023-01-27 18:07:30,710 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 9 predicate places. [2023-01-27 18:07:30,710 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 107 transitions, 1021 flow [2023-01-27 18:07:30,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:07:30,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:07:30,710 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:07:30,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2023-01-27 18:07:30,710 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-01-27 18:07:30,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:07:30,711 INFO L85 PathProgramCache]: Analyzing trace with hash 815483311, now seen corresponding path program 1 times [2023-01-27 18:07:30,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:07:30,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220858956] [2023-01-27 18:07:30,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:07:30,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:07:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:07:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 18:07:30,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:07:30,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220858956] [2023-01-27 18:07:30,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220858956] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:07:30,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:07:30,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:07:30,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714003046] [2023-01-27 18:07:30,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:07:30,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 18:07:30,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:07:30,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 18:07:30,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 18:07:30,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-01-27 18:07:30,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 107 transitions, 1021 flow. Second operand has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:07:30,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:07:30,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-01-27 18:07:30,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:07:59,278 INFO L130 PetriNetUnfolder]: 335923/429061 cut-off events. [2023-01-27 18:07:59,279 INFO L131 PetriNetUnfolder]: For 1173031/1173031 co-relation queries the response was YES. [2023-01-27 18:08:01,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1670367 conditions, 429061 events. 335923/429061 cut-off events. For 1173031/1173031 co-relation queries the response was YES. Maximal size of possible extension queue 21877. Compared 3002326 event pairs, 64967 based on Foata normal form. 18824/389225 useless extension candidates. Maximal degree in co-relation 947173. Up to 340086 conditions per place. [2023-01-27 18:08:03,308 INFO L137 encePairwiseOnDemand]: 189/191 looper letters, 147 selfloop transitions, 8 changer transitions 0/158 dead transitions. [2023-01-27 18:08:03,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 158 transitions, 1758 flow [2023-01-27 18:08:03,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:08:03,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:08:03,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 280 transitions. [2023-01-27 18:08:03,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4886561954624782 [2023-01-27 18:08:03,309 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 280 transitions. [2023-01-27 18:08:03,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 280 transitions. [2023-01-27 18:08:03,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:08:03,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 280 transitions. [2023-01-27 18:08:03,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:08:03,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:08:03,310 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:08:03,310 INFO L175 Difference]: Start difference. First operand has 58 places, 107 transitions, 1021 flow. Second operand 3 states and 280 transitions. [2023-01-27 18:08:03,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 158 transitions, 1758 flow [2023-01-27 18:08:18,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 158 transitions, 1668 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:08:18,060 INFO L231 Difference]: Finished difference. Result has 57 places, 106 transitions, 943 flow [2023-01-27 18:08:18,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=943, PETRI_PLACES=57, PETRI_TRANSITIONS=106} [2023-01-27 18:08:18,061 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 8 predicate places. [2023-01-27 18:08:18,061 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 106 transitions, 943 flow [2023-01-27 18:08:18,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:08:18,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:08:18,061 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:08:18,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2023-01-27 18:08:18,061 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-01-27 18:08:18,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:08:18,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1371215118, now seen corresponding path program 1 times [2023-01-27 18:08:18,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:08:18,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375241301] [2023-01-27 18:08:18,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:08:18,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:08:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:08:18,075 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-01-27 18:08:18,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:08:18,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375241301] [2023-01-27 18:08:18,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375241301] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:08:18,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:08:18,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:08:18,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002067546] [2023-01-27 18:08:18,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:08:18,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:08:18,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:08:18,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:08:18,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:08:18,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-01-27 18:08:18,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 106 transitions, 943 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:08:18,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:08:18,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-01-27 18:08:18,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:09:00,215 INFO L130 PetriNetUnfolder]: 439672/585215 cut-off events. [2023-01-27 18:09:00,225 INFO L131 PetriNetUnfolder]: For 1746645/1746645 co-relation queries the response was YES. [2023-01-27 18:09:02,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2143905 conditions, 585215 events. 439672/585215 cut-off events. For 1746645/1746645 co-relation queries the response was YES. Maximal size of possible extension queue 30348. Compared 4591998 event pairs, 165426 based on Foata normal form. 0/513184 useless extension candidates. Maximal degree in co-relation 1260964. Up to 416353 conditions per place. [2023-01-27 18:09:05,843 INFO L137 encePairwiseOnDemand]: 182/191 looper letters, 102 selfloop transitions, 81 changer transitions 0/186 dead transitions. [2023-01-27 18:09:05,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 186 transitions, 2047 flow [2023-01-27 18:09:05,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:09:05,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:09:05,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 279 transitions. [2023-01-27 18:09:05,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4869109947643979 [2023-01-27 18:09:05,844 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 279 transitions. [2023-01-27 18:09:05,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 279 transitions. [2023-01-27 18:09:05,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:09:05,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 279 transitions. [2023-01-27 18:09:05,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.0) internal successors, (279), 3 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) [2023-01-27 18:09:05,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:09:05,861 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:09:05,861 INFO L175 Difference]: Start difference. First operand has 57 places, 106 transitions, 943 flow. Second operand 3 states and 279 transitions. [2023-01-27 18:09:05,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 186 transitions, 2047 flow [2023-01-27 18:09:08,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 186 transitions, 2031 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 18:09:08,671 INFO L231 Difference]: Finished difference. Result has 60 places, 171 transitions, 2065 flow [2023-01-27 18:09:08,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2065, PETRI_PLACES=60, PETRI_TRANSITIONS=171} [2023-01-27 18:09:08,671 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 11 predicate places. [2023-01-27 18:09:08,672 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 171 transitions, 2065 flow [2023-01-27 18:09:08,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:09:08,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:09:08,672 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:09:08,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2023-01-27 18:09:08,672 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-01-27 18:09:08,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:09:08,672 INFO L85 PathProgramCache]: Analyzing trace with hash -441998740, now seen corresponding path program 1 times [2023-01-27 18:09:08,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:09:08,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966774439] [2023-01-27 18:09:08,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:09:08,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:09:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:09:08,817 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-01-27 18:09:08,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:09:08,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966774439] [2023-01-27 18:09:08,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966774439] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:09:08,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:09:08,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:09:08,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340085132] [2023-01-27 18:09:08,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:09:08,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 18:09:08,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:09:08,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 18:09:08,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 18:09:08,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-01-27 18:09:08,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 171 transitions, 2065 flow. Second operand has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:09:08,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:09:08,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-01-27 18:09:08,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand