/usr/bin/java -Xmx8000000000 -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-RepeatedSemanticLbeWithDisjunctivePredicates.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-06 07:05:29,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-06 07:05:29,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-06 07:05:30,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-06 07:05:30,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-06 07:05:30,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-06 07:05:30,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-06 07:05:30,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-06 07:05:30,035 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-06 07:05:30,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-06 07:05:30,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-06 07:05:30,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-06 07:05:30,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-06 07:05:30,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-06 07:05:30,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-06 07:05:30,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-06 07:05:30,048 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-06 07:05:30,049 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-06 07:05:30,051 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-06 07:05:30,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-06 07:05:30,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-06 07:05:30,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-06 07:05:30,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-06 07:05:30,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-06 07:05:30,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-06 07:05:30,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-06 07:05:30,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-06 07:05:30,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-06 07:05:30,060 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-06 07:05:30,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-06 07:05:30,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-06 07:05:30,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-06 07:05:30,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-06 07:05:30,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-06 07:05:30,063 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-06 07:05:30,064 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-06 07:05:30,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-06 07:05:30,065 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-06 07:05:30,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-06 07:05:30,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-06 07:05:30,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-06 07:05:30,067 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-RepeatedSemanticLbeWithDisjunctivePredicates.epf [2022-12-06 07:05:30,099 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-06 07:05:30,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-06 07:05:30,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-06 07:05:30,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-06 07:05:30,101 INFO L138 SettingsManager]: * Use SBE=true [2022-12-06 07:05:30,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-06 07:05:30,102 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-06 07:05:30,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-06 07:05:30,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-06 07:05:30,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-06 07:05:30,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-06 07:05:30,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-06 07:05:30,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-06 07:05:30,104 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-06 07:05:30,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-06 07:05:30,104 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-06 07:05:30,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-06 07:05:30,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-06 07:05:30,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-06 07:05:30,105 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-06 07:05:30,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-06 07:05:30,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-06 07:05:30,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-06 07:05:30,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-06 07:05:30,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-06 07:05:30,105 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-06 07:05:30,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-06 07:05:30,106 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=REPEATED_LIPTON_PN [2022-12-06 07:05:30,106 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-06 07:05:30,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-06 07:05:30,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-06 07:05:30,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-06 07:05:30,434 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-06 07:05:30,434 INFO L275 PluginConnector]: CDTParser initialized [2022-12-06 07:05:30,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2022-12-06 07:05:31,436 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-06 07:05:31,737 INFO L351 CDTParser]: Found 1 translation units. [2022-12-06 07:05:31,737 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2022-12-06 07:05:31,760 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b30d6a9b4/c1b85986442245afaebb70b8cda976ae/FLAG4ce5d4aef [2022-12-06 07:05:31,773 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b30d6a9b4/c1b85986442245afaebb70b8cda976ae [2022-12-06 07:05:31,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-06 07:05:31,776 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-06 07:05:31,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-06 07:05:31,777 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-06 07:05:31,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-06 07:05:31,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:05:31" (1/1) ... [2022-12-06 07:05:31,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e411d4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:31, skipping insertion in model container [2022-12-06 07:05:31,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:05:31" (1/1) ... [2022-12-06 07:05:31,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-06 07:05:31,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-06 07:05:32,013 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2022-12-06 07:05:32,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-06 07:05:32,425 INFO L203 MainTranslator]: Completed pre-run [2022-12-06 07:05:32,436 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2022-12-06 07:05:32,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-06 07:05:32,555 INFO L208 MainTranslator]: Completed translation [2022-12-06 07:05:32,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:32 WrapperNode [2022-12-06 07:05:32,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-06 07:05:32,557 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-06 07:05:32,557 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-06 07:05:32,558 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-06 07:05:32,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:32" (1/1) ... [2022-12-06 07:05:32,595 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:32" (1/1) ... [2022-12-06 07:05:32,619 INFO L138 Inliner]: procedures = 364, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2022-12-06 07:05:32,619 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-06 07:05:32,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-06 07:05:32,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-06 07:05:32,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-06 07:05:32,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:32" (1/1) ... [2022-12-06 07:05:32,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:32" (1/1) ... [2022-12-06 07:05:32,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:32" (1/1) ... [2022-12-06 07:05:32,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:32" (1/1) ... [2022-12-06 07:05:32,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:32" (1/1) ... [2022-12-06 07:05:32,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:32" (1/1) ... [2022-12-06 07:05:32,652 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:32" (1/1) ... [2022-12-06 07:05:32,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:32" (1/1) ... [2022-12-06 07:05:32,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-06 07:05:32,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-06 07:05:32,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-06 07:05:32,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-06 07:05:32,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:32" (1/1) ... [2022-12-06 07:05:32,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-06 07:05:32,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 07:05:32,690 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-06 07:05:32,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-06 07:05:32,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-06 07:05:32,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-06 07:05:32,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-06 07:05:32,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-06 07:05:32,740 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-06 07:05:32,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-06 07:05:32,740 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2022-12-06 07:05:32,740 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2022-12-06 07:05:32,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-06 07:05:32,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-06 07:05:32,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-06 07:05:32,742 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-06 07:05:32,895 INFO L236 CfgBuilder]: Building ICFG [2022-12-06 07:05:32,897 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-06 07:05:33,016 INFO L277 CfgBuilder]: Performing block encoding [2022-12-06 07:05:33,025 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-06 07:05:33,026 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-06 07:05:33,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:05:33 BoogieIcfgContainer [2022-12-06 07:05:33,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-06 07:05:33,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-06 07:05:33,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-06 07:05:33,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-06 07:05:33,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:05:31" (1/3) ... [2022-12-06 07:05:33,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa82621 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:05:33, skipping insertion in model container [2022-12-06 07:05:33,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:32" (2/3) ... [2022-12-06 07:05:33,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa82621 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:05:33, skipping insertion in model container [2022-12-06 07:05:33,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:05:33" (3/3) ... [2022-12-06 07:05:33,036 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2022-12-06 07:05:33,052 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-06 07:05:33,052 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-06 07:05:33,052 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-06 07:05:33,131 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-06 07:05:33,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 86 transitions, 180 flow [2022-12-06 07:05:33,233 INFO L130 PetriNetUnfolder]: 7/85 cut-off events. [2022-12-06 07:05:33,233 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 07:05:33,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 7/85 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2022-12-06 07:05:33,239 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 86 transitions, 180 flow [2022-12-06 07:05:33,246 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 77 transitions, 160 flow [2022-12-06 07:05:33,248 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:05:33,268 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 77 transitions, 160 flow [2022-12-06 07:05:33,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 77 transitions, 160 flow [2022-12-06 07:05:33,287 INFO L130 PetriNetUnfolder]: 6/77 cut-off events. [2022-12-06 07:05:33,287 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 07:05:33,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 77 events. 6/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 77 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2022-12-06 07:05:33,289 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 77 transitions, 160 flow [2022-12-06 07:05:33,290 INFO L188 LiptonReduction]: Number of co-enabled transitions 722 [2022-12-06 07:05:35,507 INFO L203 LiptonReduction]: Total number of compositions: 62 [2022-12-06 07:05:35,526 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-06 07:05:35,532 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=REPEATED_LIPTON_PN, 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;@53890e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-06 07:05:35,532 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-06 07:05:35,536 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-12-06 07:05:35,537 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 07:05:35,537 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:05:35,538 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 07:05:35,538 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 07:05:35,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:05:35,542 INFO L85 PathProgramCache]: Analyzing trace with hash 89472530, now seen corresponding path program 1 times [2022-12-06 07:05:35,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:05:35,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176937456] [2022-12-06 07:05:35,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:05:35,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:05:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:05:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 07:05:35,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:05:35,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176937456] [2022-12-06 07:05:35,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176937456] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 07:05:35,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 07:05:35,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-06 07:05:35,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654027949] [2022-12-06 07:05:35,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 07:05:35,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-06 07:05:35,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:05:35,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-06 07:05:35,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-06 07:05:35,782 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-06 07:05:35,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 15 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 07:05:35,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:05:35,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-06 07:05:35,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:05:35,835 INFO L130 PetriNetUnfolder]: 41/86 cut-off events. [2022-12-06 07:05:35,835 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 07:05:35,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 86 events. 41/86 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 206 event pairs, 15 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 162. Up to 53 conditions per place. [2022-12-06 07:05:35,838 INFO L137 encePairwiseOnDemand]: 12/15 looper letters, 20 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2022-12-06 07:05:35,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 23 transitions, 96 flow [2022-12-06 07:05:35,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-06 07:05:35,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-06 07:05:35,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 26 transitions. [2022-12-06 07:05:35,847 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2022-12-06 07:05:35,848 INFO L175 Difference]: Start difference. First operand has 17 places, 15 transitions, 36 flow. Second operand 3 states and 26 transitions. [2022-12-06 07:05:35,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 23 transitions, 96 flow [2022-12-06 07:05:35,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 23 transitions, 92 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-06 07:05:35,855 INFO L231 Difference]: Finished difference. Result has 18 places, 16 transitions, 44 flow [2022-12-06 07:05:35,856 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=18, PETRI_TRANSITIONS=16} [2022-12-06 07:05:35,861 INFO L294 CegarLoopForPetriNet]: 17 programPoint places, 1 predicate places. [2022-12-06 07:05:35,861 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 07:05:35,862 INFO L89 Accepts]: Start accepts. Operand has 18 places, 16 transitions, 44 flow [2022-12-06 07:05:35,864 INFO L95 Accepts]: Finished accepts. [2022-12-06 07:05:35,864 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:05:35,864 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 18 places, 16 transitions, 44 flow [2022-12-06 07:05:35,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 18 places, 16 transitions, 44 flow [2022-12-06 07:05:35,876 INFO L130 PetriNetUnfolder]: 2/19 cut-off events. [2022-12-06 07:05:35,876 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 07:05:35,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 16 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 4 conditions per place. [2022-12-06 07:05:35,877 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 18 places, 16 transitions, 44 flow [2022-12-06 07:05:35,877 INFO L188 LiptonReduction]: Number of co-enabled transitions 70 [2022-12-06 07:05:35,891 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 07:05:35,893 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 32 [2022-12-06 07:05:35,893 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 16 transitions, 44 flow [2022-12-06 07:05:35,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 07:05:35,894 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:05:35,894 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 07:05:35,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-06 07:05:35,894 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 07:05:35,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:05:35,895 INFO L85 PathProgramCache]: Analyzing trace with hash -683595234, now seen corresponding path program 1 times [2022-12-06 07:05:35,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:05:35,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927483062] [2022-12-06 07:05:35,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:05:35,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:05:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:05:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 07:05:35,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:05:35,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927483062] [2022-12-06 07:05:35,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927483062] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 07:05:35,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 07:05:35,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-06 07:05:35,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083782665] [2022-12-06 07:05:35,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 07:05:35,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-06 07:05:35,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:05:35,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-06 07:05:35,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-06 07:05:35,973 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-06 07:05:35,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 07:05:35,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:05:35,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-06 07:05:35,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:05:36,030 INFO L130 PetriNetUnfolder]: 61/143 cut-off events. [2022-12-06 07:05:36,030 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-12-06 07:05:36,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 143 events. 61/143 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 496 event pairs, 27 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 92. Up to 85 conditions per place. [2022-12-06 07:05:36,032 INFO L137 encePairwiseOnDemand]: 12/15 looper letters, 22 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2022-12-06 07:05:36,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 25 transitions, 120 flow [2022-12-06 07:05:36,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-06 07:05:36,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-06 07:05:36,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 26 transitions. [2022-12-06 07:05:36,033 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2022-12-06 07:05:36,033 INFO L175 Difference]: Start difference. First operand has 18 places, 16 transitions, 44 flow. Second operand 3 states and 26 transitions. [2022-12-06 07:05:36,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 25 transitions, 120 flow [2022-12-06 07:05:36,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 25 transitions, 116 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-06 07:05:36,035 INFO L231 Difference]: Finished difference. Result has 20 places, 17 transitions, 54 flow [2022-12-06 07:05:36,035 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=20, PETRI_TRANSITIONS=17} [2022-12-06 07:05:36,035 INFO L294 CegarLoopForPetriNet]: 17 programPoint places, 3 predicate places. [2022-12-06 07:05:36,036 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 07:05:36,036 INFO L89 Accepts]: Start accepts. Operand has 20 places, 17 transitions, 54 flow [2022-12-06 07:05:36,038 INFO L95 Accepts]: Finished accepts. [2022-12-06 07:05:36,038 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:05:36,038 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 20 places, 17 transitions, 54 flow [2022-12-06 07:05:36,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 20 places, 17 transitions, 54 flow [2022-12-06 07:05:36,043 INFO L130 PetriNetUnfolder]: 2/22 cut-off events. [2022-12-06 07:05:36,043 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 07:05:36,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 22 events. 2/22 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 26 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 22. Up to 4 conditions per place. [2022-12-06 07:05:36,045 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 20 places, 17 transitions, 54 flow [2022-12-06 07:05:36,045 INFO L188 LiptonReduction]: Number of co-enabled transitions 84 [2022-12-06 07:05:36,050 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 07:05:36,051 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 15 [2022-12-06 07:05:36,051 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 17 transitions, 54 flow [2022-12-06 07:05:36,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 07:05:36,052 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:05:36,052 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 07:05:36,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-06 07:05:36,052 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 07:05:36,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:05:36,053 INFO L85 PathProgramCache]: Analyzing trace with hash 468442048, now seen corresponding path program 1 times [2022-12-06 07:05:36,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:05:36,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934200168] [2022-12-06 07:05:36,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:05:36,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:05:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:05:36,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 07:05:36,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:05:36,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934200168] [2022-12-06 07:05:36,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934200168] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 07:05:36,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654188064] [2022-12-06 07:05:36,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:05:36,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:05:36,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 07:05:36,159 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 07:05:36,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-06 07:05:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:05:36,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-06 07:05:36,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 07:05:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 07:05:36,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 07:05:36,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 07:05:36,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654188064] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 07:05:36,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 07:05:36,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-06 07:05:36,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742767837] [2022-12-06 07:05:36,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 07:05:36,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-06 07:05:36,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:05:36,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-06 07:05:36,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-06 07:05:36,361 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-06 07:05:36,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 54 flow. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 07:05:36,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:05:36,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-06 07:05:36,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:05:36,496 INFO L130 PetriNetUnfolder]: 111/264 cut-off events. [2022-12-06 07:05:36,496 INFO L131 PetriNetUnfolder]: For 113/113 co-relation queries the response was YES. [2022-12-06 07:05:36,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 264 events. 111/264 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 930 event pairs, 18 based on Foata normal form. 30/294 useless extension candidates. Maximal degree in co-relation 198. Up to 55 conditions per place. [2022-12-06 07:05:36,498 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 44 selfloop transitions, 6 changer transitions 0/51 dead transitions. [2022-12-06 07:05:36,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 51 transitions, 258 flow [2022-12-06 07:05:36,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-06 07:05:36,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-06 07:05:36,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 54 transitions. [2022-12-06 07:05:36,500 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6 [2022-12-06 07:05:36,500 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 54 flow. Second operand 6 states and 54 transitions. [2022-12-06 07:05:36,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 51 transitions, 258 flow [2022-12-06 07:05:36,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 51 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-06 07:05:36,502 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 92 flow [2022-12-06 07:05:36,502 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=92, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2022-12-06 07:05:36,503 INFO L294 CegarLoopForPetriNet]: 17 programPoint places, 11 predicate places. [2022-12-06 07:05:36,503 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 07:05:36,503 INFO L89 Accepts]: Start accepts. Operand has 28 places, 20 transitions, 92 flow [2022-12-06 07:05:36,504 INFO L95 Accepts]: Finished accepts. [2022-12-06 07:05:36,504 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:05:36,505 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 20 transitions, 92 flow [2022-12-06 07:05:36,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 20 transitions, 92 flow [2022-12-06 07:05:36,509 INFO L130 PetriNetUnfolder]: 2/29 cut-off events. [2022-12-06 07:05:36,509 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-12-06 07:05:36,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 29 events. 2/29 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 21 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 42. Up to 6 conditions per place. [2022-12-06 07:05:36,510 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 28 places, 20 transitions, 92 flow [2022-12-06 07:05:36,510 INFO L188 LiptonReduction]: Number of co-enabled transitions 126 [2022-12-06 07:05:36,526 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 07:05:36,528 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 25 [2022-12-06 07:05:36,528 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 92 flow [2022-12-06 07:05:36,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 07:05:36,528 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:05:36,528 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 07:05:36,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-06 07:05:36,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:05:36,734 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 07:05:36,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:05:36,734 INFO L85 PathProgramCache]: Analyzing trace with hash 2064556268, now seen corresponding path program 2 times [2022-12-06 07:05:36,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:05:36,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939524301] [2022-12-06 07:05:36,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:05:36,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:05:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:05:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-06 07:05:36,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:05:36,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939524301] [2022-12-06 07:05:36,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939524301] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 07:05:36,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091327875] [2022-12-06 07:05:36,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-06 07:05:36,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:05:36,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 07:05:36,825 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 07:05:36,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-06 07:05:36,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-06 07:05:36,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 07:05:36,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-06 07:05:36,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 07:05:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-06 07:05:36,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 07:05:37,095 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-06 07:05:37,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091327875] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 07:05:37,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 07:05:37,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-12-06 07:05:37,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271181037] [2022-12-06 07:05:37,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 07:05:37,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-06 07:05:37,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:05:37,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-06 07:05:37,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-12-06 07:05:37,098 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-06 07:05:37,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 92 flow. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 07:05:37,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:05:37,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-06 07:05:37,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:05:37,596 INFO L130 PetriNetUnfolder]: 323/748 cut-off events. [2022-12-06 07:05:37,596 INFO L131 PetriNetUnfolder]: For 1511/1511 co-relation queries the response was YES. [2022-12-06 07:05:37,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2276 conditions, 748 events. 323/748 cut-off events. For 1511/1511 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3109 event pairs, 10 based on Foata normal form. 107/855 useless extension candidates. Maximal degree in co-relation 588. Up to 168 conditions per place. [2022-12-06 07:05:37,603 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 158 selfloop transitions, 69 changer transitions 0/228 dead transitions. [2022-12-06 07:05:37,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 228 transitions, 1346 flow [2022-12-06 07:05:37,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-06 07:05:37,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-06 07:05:37,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 290 transitions. [2022-12-06 07:05:37,611 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2022-12-06 07:05:37,611 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 92 flow. Second operand 34 states and 290 transitions. [2022-12-06 07:05:37,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 228 transitions, 1346 flow [2022-12-06 07:05:37,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 228 transitions, 1286 flow, removed 27 selfloop flow, removed 1 redundant places. [2022-12-06 07:05:37,623 INFO L231 Difference]: Finished difference. Result has 85 places, 82 transitions, 724 flow [2022-12-06 07:05:37,623 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=724, PETRI_PLACES=85, PETRI_TRANSITIONS=82} [2022-12-06 07:05:37,625 INFO L294 CegarLoopForPetriNet]: 17 programPoint places, 68 predicate places. [2022-12-06 07:05:37,625 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 07:05:37,625 INFO L89 Accepts]: Start accepts. Operand has 85 places, 82 transitions, 724 flow [2022-12-06 07:05:37,633 INFO L95 Accepts]: Finished accepts. [2022-12-06 07:05:37,633 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:05:37,633 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 82 transitions, 724 flow [2022-12-06 07:05:37,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 82 transitions, 724 flow [2022-12-06 07:05:37,678 INFO L130 PetriNetUnfolder]: 63/249 cut-off events. [2022-12-06 07:05:37,678 INFO L131 PetriNetUnfolder]: For 3041/3047 co-relation queries the response was YES. [2022-12-06 07:05:37,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1206 conditions, 249 events. 63/249 cut-off events. For 3041/3047 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 863 event pairs, 7 based on Foata normal form. 4/247 useless extension candidates. Maximal degree in co-relation 997. Up to 61 conditions per place. [2022-12-06 07:05:37,683 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 82 transitions, 724 flow [2022-12-06 07:05:37,683 INFO L188 LiptonReduction]: Number of co-enabled transitions 422 [2022-12-06 07:05:37,700 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 07:05:37,702 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 77 [2022-12-06 07:05:37,702 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 82 transitions, 724 flow [2022-12-06 07:05:37,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 07:05:37,703 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:05:37,703 INFO L213 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 07:05:37,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-06 07:05:37,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-06 07:05:37,909 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 07:05:37,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:05:37,909 INFO L85 PathProgramCache]: Analyzing trace with hash 614689770, now seen corresponding path program 3 times [2022-12-06 07:05:37,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:05:37,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342285021] [2022-12-06 07:05:37,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:05:37,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:05:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:05:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-06 07:05:38,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:05:38,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342285021] [2022-12-06 07:05:38,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342285021] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 07:05:38,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986345739] [2022-12-06 07:05:38,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-06 07:05:38,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:05:38,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 07:05:38,044 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 07:05:38,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-06 07:05:38,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-06 07:05:38,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 07:05:38,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-06 07:05:38,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 07:05:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-06 07:05:38,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 07:05:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-06 07:05:38,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986345739] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 07:05:38,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 07:05:38,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-12-06 07:05:38,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785409342] [2022-12-06 07:05:38,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 07:05:38,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-06 07:05:38,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:05:38,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-06 07:05:38,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-12-06 07:05:38,296 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-06 07:05:38,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 82 transitions, 724 flow. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 07:05:38,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:05:38,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-06 07:05:38,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:05:38,564 INFO L130 PetriNetUnfolder]: 622/1302 cut-off events. [2022-12-06 07:05:38,565 INFO L131 PetriNetUnfolder]: For 19882/19882 co-relation queries the response was YES. [2022-12-06 07:05:38,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6869 conditions, 1302 events. 622/1302 cut-off events. For 19882/19882 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 6262 event pairs, 84 based on Foata normal form. 92/1394 useless extension candidates. Maximal degree in co-relation 5483. Up to 324 conditions per place. [2022-12-06 07:05:38,580 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 128 selfloop transitions, 38 changer transitions 0/167 dead transitions. [2022-12-06 07:05:38,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 167 transitions, 1986 flow [2022-12-06 07:05:38,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-06 07:05:38,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-06 07:05:38,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 71 transitions. [2022-12-06 07:05:38,582 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2022-12-06 07:05:38,582 INFO L175 Difference]: Start difference. First operand has 85 places, 82 transitions, 724 flow. Second operand 8 states and 71 transitions. [2022-12-06 07:05:38,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 167 transitions, 1986 flow [2022-12-06 07:05:38,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 167 transitions, 1900 flow, removed 11 selfloop flow, removed 4 redundant places. [2022-12-06 07:05:38,619 INFO L231 Difference]: Finished difference. Result has 93 places, 86 transitions, 860 flow [2022-12-06 07:05:38,620 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=860, PETRI_PLACES=93, PETRI_TRANSITIONS=86} [2022-12-06 07:05:38,623 INFO L294 CegarLoopForPetriNet]: 17 programPoint places, 76 predicate places. [2022-12-06 07:05:38,623 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 07:05:38,623 INFO L89 Accepts]: Start accepts. Operand has 93 places, 86 transitions, 860 flow [2022-12-06 07:05:38,631 INFO L95 Accepts]: Finished accepts. [2022-12-06 07:05:38,632 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:05:38,632 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 86 transitions, 860 flow [2022-12-06 07:05:38,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 86 transitions, 860 flow [2022-12-06 07:05:38,703 INFO L130 PetriNetUnfolder]: 81/353 cut-off events. [2022-12-06 07:05:38,704 INFO L131 PetriNetUnfolder]: For 7209/7309 co-relation queries the response was YES. [2022-12-06 07:05:38,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1727 conditions, 353 events. 81/353 cut-off events. For 7209/7309 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1475 event pairs, 36 based on Foata normal form. 39/389 useless extension candidates. Maximal degree in co-relation 1390. Up to 93 conditions per place. [2022-12-06 07:05:38,711 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 86 transitions, 860 flow [2022-12-06 07:05:38,711 INFO L188 LiptonReduction]: Number of co-enabled transitions 538 [2022-12-06 07:05:38,727 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 07:05:38,728 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 105 [2022-12-06 07:05:38,728 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 86 transitions, 860 flow [2022-12-06 07:05:38,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 07:05:38,728 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:05:38,731 INFO L213 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 07:05:38,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-06 07:05:38,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:05:38,942 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 07:05:38,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:05:38,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1406674066, now seen corresponding path program 4 times [2022-12-06 07:05:38,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:05:38,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569586518] [2022-12-06 07:05:38,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:05:38,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:05:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:05:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-06 07:05:39,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:05:39,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569586518] [2022-12-06 07:05:39,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569586518] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 07:05:39,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980018688] [2022-12-06 07:05:39,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-06 07:05:39,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:05:39,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 07:05:39,152 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 07:05:39,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-06 07:05:39,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-06 07:05:39,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 07:05:39,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-06 07:05:39,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 07:05:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-06 07:05:39,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 07:05:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-06 07:05:39,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980018688] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 07:05:39,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 07:05:39,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-06 07:05:39,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500687784] [2022-12-06 07:05:39,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 07:05:39,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-06 07:05:39,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:05:39,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-06 07:05:39,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-12-06 07:05:39,576 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-06 07:05:39,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 86 transitions, 860 flow. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 07:05:39,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:05:39,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-06 07:05:39,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:05:40,193 INFO L130 PetriNetUnfolder]: 1358/2774 cut-off events. [2022-12-06 07:05:40,193 INFO L131 PetriNetUnfolder]: For 52612/52612 co-relation queries the response was YES. [2022-12-06 07:05:40,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16291 conditions, 2774 events. 1358/2774 cut-off events. For 52612/52612 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 14460 event pairs, 84 based on Foata normal form. 184/2958 useless extension candidates. Maximal degree in co-relation 13086. Up to 708 conditions per place. [2022-12-06 07:05:40,228 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 272 selfloop transitions, 46 changer transitions 0/319 dead transitions. [2022-12-06 07:05:40,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 319 transitions, 3996 flow [2022-12-06 07:05:40,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-06 07:05:40,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-06 07:05:40,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 147 transitions. [2022-12-06 07:05:40,230 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6125 [2022-12-06 07:05:40,230 INFO L175 Difference]: Start difference. First operand has 93 places, 86 transitions, 860 flow. Second operand 16 states and 147 transitions. [2022-12-06 07:05:40,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 319 transitions, 3996 flow [2022-12-06 07:05:40,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 319 transitions, 3832 flow, removed 60 selfloop flow, removed 2 redundant places. [2022-12-06 07:05:40,344 INFO L231 Difference]: Finished difference. Result has 115 places, 95 transitions, 1082 flow [2022-12-06 07:05:40,345 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1082, PETRI_PLACES=115, PETRI_TRANSITIONS=95} [2022-12-06 07:05:40,345 INFO L294 CegarLoopForPetriNet]: 17 programPoint places, 98 predicate places. [2022-12-06 07:05:40,345 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 07:05:40,345 INFO L89 Accepts]: Start accepts. Operand has 115 places, 95 transitions, 1082 flow [2022-12-06 07:05:40,352 INFO L95 Accepts]: Finished accepts. [2022-12-06 07:05:40,352 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:05:40,352 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 95 transitions, 1082 flow [2022-12-06 07:05:40,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 95 transitions, 1082 flow [2022-12-06 07:05:40,445 INFO L130 PetriNetUnfolder]: 137/665 cut-off events. [2022-12-06 07:05:40,445 INFO L131 PetriNetUnfolder]: For 16236/16552 co-relation queries the response was YES. [2022-12-06 07:05:40,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3337 conditions, 665 events. 137/665 cut-off events. For 16236/16552 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3357 event pairs, 92 based on Foata normal form. 95/757 useless extension candidates. Maximal degree in co-relation 3009. Up to 205 conditions per place. [2022-12-06 07:05:40,458 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 95 transitions, 1082 flow [2022-12-06 07:05:40,458 INFO L188 LiptonReduction]: Number of co-enabled transitions 794 [2022-12-06 07:05:40,477 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 07:05:40,478 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 133 [2022-12-06 07:05:40,478 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 95 transitions, 1082 flow [2022-12-06 07:05:40,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 07:05:40,478 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:05:40,479 INFO L213 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 07:05:40,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-06 07:05:40,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:05:40,685 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 07:05:40,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:05:40,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1510009216, now seen corresponding path program 5 times [2022-12-06 07:05:40,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:05:40,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341766653] [2022-12-06 07:05:40,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:05:40,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:05:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:05:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-06 07:05:41,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:05:41,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341766653] [2022-12-06 07:05:41,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341766653] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 07:05:41,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922508515] [2022-12-06 07:05:41,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-06 07:05:41,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:05:41,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 07:05:41,217 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 07:05:41,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-06 07:05:41,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-12-06 07:05:41,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 07:05:41,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-06 07:05:41,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 07:05:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 14 proven. 145 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-12-06 07:05:41,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 07:05:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 14 proven. 145 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-12-06 07:05:41,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922508515] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 07:05:41,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 07:05:41,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 37 [2022-12-06 07:05:41,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230747969] [2022-12-06 07:05:41,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 07:05:41,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-06 07:05:41,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:05:41,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-06 07:05:41,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=966, Unknown=0, NotChecked=0, Total=1332 [2022-12-06 07:05:41,861 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-06 07:05:41,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 95 transitions, 1082 flow. Second operand has 37 states, 37 states have (on average 4.081081081081081) internal successors, (151), 37 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 07:05:41,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:05:41,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-06 07:05:41,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:05:55,234 INFO L130 PetriNetUnfolder]: 2839/5880 cut-off events. [2022-12-06 07:05:55,235 INFO L131 PetriNetUnfolder]: For 235464/235464 co-relation queries the response was YES. [2022-12-06 07:05:55,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32965 conditions, 5880 events. 2839/5880 cut-off events. For 235464/235464 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 35028 event pairs, 10 based on Foata normal form. 703/6583 useless extension candidates. Maximal degree in co-relation 30511. Up to 1452 conditions per place. [2022-12-06 07:05:55,320 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 1390 selfloop transitions, 718 changer transitions 0/2109 dead transitions. [2022-12-06 07:05:55,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 2109 transitions, 23792 flow [2022-12-06 07:05:55,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 337 states. [2022-12-06 07:05:55,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2022-12-06 07:05:55,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 2596 transitions. [2022-12-06 07:05:55,338 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5135509396636994 [2022-12-06 07:05:55,339 INFO L175 Difference]: Start difference. First operand has 115 places, 95 transitions, 1082 flow. Second operand 337 states and 2596 transitions. [2022-12-06 07:05:55,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 2109 transitions, 23792 flow [2022-12-06 07:05:55,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 2109 transitions, 23532 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-06 07:05:55,529 INFO L231 Difference]: Finished difference. Result has 632 places, 756 transitions, 13786 flow [2022-12-06 07:05:55,531 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=337, PETRI_FLOW=13786, PETRI_PLACES=632, PETRI_TRANSITIONS=756} [2022-12-06 07:05:55,532 INFO L294 CegarLoopForPetriNet]: 17 programPoint places, 615 predicate places. [2022-12-06 07:05:55,532 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 07:05:55,532 INFO L89 Accepts]: Start accepts. Operand has 632 places, 756 transitions, 13786 flow [2022-12-06 07:05:55,622 INFO L95 Accepts]: Finished accepts. [2022-12-06 07:05:55,622 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:05:55,623 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 632 places, 756 transitions, 13786 flow [2022-12-06 07:05:55,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 632 places, 756 transitions, 13786 flow [2022-12-06 07:05:56,342 INFO L130 PetriNetUnfolder]: 543/1991 cut-off events. [2022-12-06 07:05:56,342 INFO L131 PetriNetUnfolder]: For 338549/338900 co-relation queries the response was YES. [2022-12-06 07:05:56,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16401 conditions, 1991 events. 543/1991 cut-off events. For 338549/338900 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 12966 event pairs, 33 based on Foata normal form. 125/2088 useless extension candidates. Maximal degree in co-relation 14183. Up to 577 conditions per place. [2022-12-06 07:05:56,515 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 632 places, 756 transitions, 13786 flow [2022-12-06 07:05:56,516 INFO L188 LiptonReduction]: Number of co-enabled transitions 3360 [2022-12-06 07:05:56,592 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 07:05:56,593 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 1061 [2022-12-06 07:05:56,593 INFO L495 AbstractCegarLoop]: Abstraction has has 632 places, 756 transitions, 13786 flow [2022-12-06 07:05:56,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.081081081081081) internal successors, (151), 37 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 07:05:56,594 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:05:56,594 INFO L213 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 07:05:56,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-06 07:05:56,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:05:56,801 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 07:05:56,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:05:56,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1950423628, now seen corresponding path program 6 times [2022-12-06 07:05:56,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:05:56,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732341022] [2022-12-06 07:05:56,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:05:56,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:05:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:05:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 20 proven. 435 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2022-12-06 07:05:57,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:05:57,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732341022] [2022-12-06 07:05:57,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732341022] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 07:05:57,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126128318] [2022-12-06 07:05:57,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-06 07:05:57,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:05:57,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 07:05:57,386 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 07:05:57,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-06 07:05:57,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-12-06 07:05:57,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 07:05:57,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-06 07:05:57,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 07:05:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 20 proven. 435 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2022-12-06 07:05:58,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 07:05:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 20 proven. 435 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2022-12-06 07:05:58,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126128318] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 07:05:58,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 07:05:58,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 23 [2022-12-06 07:05:58,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238415791] [2022-12-06 07:05:58,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 07:05:58,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-06 07:05:58,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:05:58,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-06 07:05:58,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-12-06 07:05:58,421 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-06 07:05:58,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 632 places, 756 transitions, 13786 flow. Second operand has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 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) [2022-12-06 07:05:58,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:05:58,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-06 07:05:58,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:06:02,040 INFO L130 PetriNetUnfolder]: 3570/7246 cut-off events. [2022-12-06 07:06:02,040 INFO L131 PetriNetUnfolder]: For 1751500/1751502 co-relation queries the response was YES. [2022-12-06 07:06:02,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70441 conditions, 7246 events. 3570/7246 cut-off events. For 1751500/1751502 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 44155 event pairs, 149 based on Foata normal form. 217/7463 useless extension candidates. Maximal degree in co-relation 67048. Up to 1826 conditions per place. [2022-12-06 07:06:02,191 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 611 selfloop transitions, 472 changer transitions 0/1084 dead transitions. [2022-12-06 07:06:02,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 653 places, 1084 transitions, 28042 flow [2022-12-06 07:06:02,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-06 07:06:02,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-06 07:06:02,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 198 transitions. [2022-12-06 07:06:02,193 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6 [2022-12-06 07:06:02,193 INFO L175 Difference]: Start difference. First operand has 632 places, 756 transitions, 13786 flow. Second operand 22 states and 198 transitions. [2022-12-06 07:06:02,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 653 places, 1084 transitions, 28042 flow [2022-12-06 07:06:09,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 1084 transitions, 23628 flow, removed 1755 selfloop flow, removed 38 redundant places. [2022-12-06 07:06:09,418 INFO L231 Difference]: Finished difference. Result has 621 places, 841 transitions, 12876 flow [2022-12-06 07:06:09,419 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=9462, PETRI_DIFFERENCE_MINUEND_PLACES=594, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=387, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=12876, PETRI_PLACES=621, PETRI_TRANSITIONS=841} [2022-12-06 07:06:09,419 INFO L294 CegarLoopForPetriNet]: 17 programPoint places, 604 predicate places. [2022-12-06 07:06:09,419 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 07:06:09,419 INFO L89 Accepts]: Start accepts. Operand has 621 places, 841 transitions, 12876 flow [2022-12-06 07:06:09,521 INFO L95 Accepts]: Finished accepts. [2022-12-06 07:06:09,521 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:06:09,521 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 621 places, 841 transitions, 12876 flow [2022-12-06 07:06:09,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 621 places, 841 transitions, 12876 flow [2022-12-06 07:06:10,278 INFO L130 PetriNetUnfolder]: 650/2657 cut-off events. [2022-12-06 07:06:10,278 INFO L131 PetriNetUnfolder]: For 373577/373834 co-relation queries the response was YES. [2022-12-06 07:06:10,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18116 conditions, 2657 events. 650/2657 cut-off events. For 373577/373834 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 18319 event pairs, 113 based on Foata normal form. 4/2549 useless extension candidates. Maximal degree in co-relation 16467. Up to 630 conditions per place. [2022-12-06 07:06:10,347 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 621 places, 841 transitions, 12876 flow [2022-12-06 07:06:10,347 INFO L188 LiptonReduction]: Number of co-enabled transitions 3686 [2022-12-06 07:06:10,408 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 07:06:10,408 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 989 [2022-12-06 07:06:10,408 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 841 transitions, 12876 flow [2022-12-06 07:06:10,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 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) [2022-12-06 07:06:10,409 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:06:10,409 INFO L213 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 07:06:10,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-06 07:06:10,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:06:10,614 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 07:06:10,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:06:10,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1511874564, now seen corresponding path program 7 times [2022-12-06 07:06:10,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:06:10,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472135222] [2022-12-06 07:06:10,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:06:10,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:06:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:06:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 07:06:13,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:06:13,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472135222] [2022-12-06 07:06:13,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472135222] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 07:06:13,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554649202] [2022-12-06 07:06:13,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-06 07:06:13,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:06:13,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 07:06:13,856 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 07:06:13,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-06 07:06:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:06:14,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 128 conjunts are in the unsatisfiable core [2022-12-06 07:06:14,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 07:06:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 07:06:14,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 07:06:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 07:06:14,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554649202] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 07:06:14,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 07:06:14,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2022-12-06 07:06:14,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119944924] [2022-12-06 07:06:14,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 07:06:14,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-06 07:06:14,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:06:14,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-06 07:06:14,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2022-12-06 07:06:14,969 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-06 07:06:14,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 841 transitions, 12876 flow. Second operand has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 07:06:14,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:06:14,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-06 07:06:14,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:08:00,948 INFO L130 PetriNetUnfolder]: 34486/68977 cut-off events. [2022-12-06 07:08:00,949 INFO L131 PetriNetUnfolder]: For 118883878/118883878 co-relation queries the response was YES. [2022-12-06 07:08:06,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1684920 conditions, 68977 events. 34486/68977 cut-off events. For 118883878/118883878 co-relation queries the response was YES. Maximal size of possible extension queue 993. Compared 613780 event pairs, 2167 based on Foata normal form. 1/68978 useless extension candidates. Maximal degree in co-relation 1679185. Up to 16121 conditions per place. [2022-12-06 07:08:07,285 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 9624 selfloop transitions, 793 changer transitions 1/10418 dead transitions. [2022-12-06 07:08:07,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 913 places, 10418 transitions, 261958 flow [2022-12-06 07:08:07,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 293 states. [2022-12-06 07:08:07,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2022-12-06 07:08:07,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 2269 transitions. [2022-12-06 07:08:07,291 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.516268486916951 [2022-12-06 07:08:07,291 INFO L175 Difference]: Start difference. First operand has 621 places, 841 transitions, 12876 flow. Second operand 293 states and 2269 transitions. [2022-12-06 07:08:07,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 913 places, 10418 transitions, 261958 flow Received shutdown request... [2022-12-06 07:18:42,717 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-06 07:18:42,718 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-06 07:18:43,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-06 07:18:43,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown