/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/09_fmaxsym.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 17:47:48,146 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 17:47:48,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 17:47:48,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-01-27 17:47:48,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 17:47:48,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 17:47:48,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 17:47:48,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 17:47:48,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 17:47:48,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 17:47:48,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 17:47:48,226 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 17:47:48,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 17:47:48,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 17:47:48,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 17:47:48,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 17:47:48,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 17:47:48,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 17:47:48,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 17:47:48,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 17:47:48,257 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 17:47:48,287 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 17:47:48,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 17:47:48,289 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 17:47:48,289 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 17:47:48,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 17:47:48,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 17:47:48,289 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 17:47:48,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 17:47:48,290 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 17:47:48,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 17:47:48,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 17:47:48,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 17:47:48,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 17:47:48,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 17:47:48,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 17:47:48,291 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 17:47:48,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 17:47:48,291 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 17:47:48,291 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 17:47:48,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 17:47:48,291 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 17:47:48,291 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 17:47:48,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 17:47:48,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:47:48,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 17:47:48,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 17:47:48,292 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 17:47:48,292 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 17:47:48,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 17:47:48,292 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 17:47:48,292 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 17:47:48,292 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 17:47:48,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 17:47:48,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 17:47:48,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 17:47:48,520 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 17:47:48,520 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 17:47:48,521 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/09_fmaxsym.i [2023-01-27 17:47:50,147 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 17:47:50,492 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 17:47:50,493 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/09_fmaxsym.i [2023-01-27 17:47:50,566 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/819a580b1/c7086bb26e8442df99891be1e010e82f/FLAG7a65b968e [2023-01-27 17:47:50,575 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/819a580b1/c7086bb26e8442df99891be1e010e82f [2023-01-27 17:47:50,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 17:47:50,578 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 17:47:50,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 17:47:50,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 17:47:50,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 17:47:50,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:47:50" (1/1) ... [2023-01-27 17:47:50,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47dc1a3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:47:50, skipping insertion in model container [2023-01-27 17:47:50,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:47:50" (1/1) ... [2023-01-27 17:47:50,600 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 17:47:50,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 17:47:51,006 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/09_fmaxsym.i[30422,30435] [2023-01-27 17:47:51,033 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:47:51,042 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 17:47:51,097 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/09_fmaxsym.i[30422,30435] [2023-01-27 17:47:51,110 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:47:51,163 INFO L208 MainTranslator]: Completed translation [2023-01-27 17:47:51,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:47:51 WrapperNode [2023-01-27 17:47:51,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 17:47:51,165 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 17:47:51,165 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 17:47:51,165 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 17:47:51,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:47:51" (1/1) ... [2023-01-27 17:47:51,207 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:47:51" (1/1) ... [2023-01-27 17:47:51,242 INFO L138 Inliner]: procedures = 171, calls = 24, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 78 [2023-01-27 17:47:51,242 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 17:47:51,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 17:47:51,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 17:47:51,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 17:47:51,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:47:51" (1/1) ... [2023-01-27 17:47:51,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:47:51" (1/1) ... [2023-01-27 17:47:51,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:47:51" (1/1) ... [2023-01-27 17:47:51,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:47:51" (1/1) ... [2023-01-27 17:47:51,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:47:51" (1/1) ... [2023-01-27 17:47:51,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:47:51" (1/1) ... [2023-01-27 17:47:51,297 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:47:51" (1/1) ... [2023-01-27 17:47:51,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:47:51" (1/1) ... [2023-01-27 17:47:51,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 17:47:51,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 17:47:51,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 17:47:51,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 17:47:51,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:47:51" (1/1) ... [2023-01-27 17:47:51,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:47:51,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:47:51,358 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-27 17:47:51,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-27 17:47:51,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 17:47:51,417 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-01-27 17:47:51,417 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-01-27 17:47:51,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 17:47:51,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 17:47:51,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 17:47:51,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 17:47:51,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 17:47:51,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 17:47:51,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 17:47:51,424 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 17:47:51,634 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 17:47:51,635 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 17:47:51,778 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 17:47:51,807 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 17:47:51,807 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-27 17:47:51,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:47:51 BoogieIcfgContainer [2023-01-27 17:47:51,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 17:47:51,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 17:47:51,843 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 17:47:51,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 17:47:51,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 05:47:50" (1/3) ... [2023-01-27 17:47:51,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2513e50d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:47:51, skipping insertion in model container [2023-01-27 17:47:51,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:47:51" (2/3) ... [2023-01-27 17:47:51,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2513e50d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:47:51, skipping insertion in model container [2023-01-27 17:47:51,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:47:51" (3/3) ... [2023-01-27 17:47:51,847 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym.i [2023-01-27 17:47:51,933 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 17:47:51,933 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 17:47:51,933 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 17:47:52,071 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:47:52,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 72 transitions, 149 flow [2023-01-27 17:47:52,190 INFO L130 PetriNetUnfolder]: 7/82 cut-off events. [2023-01-27 17:47:52,190 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:47:52,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 82 events. 7/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2023-01-27 17:47:52,198 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 72 transitions, 149 flow [2023-01-27 17:47:52,204 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 72 transitions, 149 flow [2023-01-27 17:47:52,208 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:47:52,222 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 72 transitions, 149 flow [2023-01-27 17:47:52,249 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 72 transitions, 149 flow [2023-01-27 17:47:52,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 72 transitions, 149 flow [2023-01-27 17:47:52,293 INFO L130 PetriNetUnfolder]: 7/82 cut-off events. [2023-01-27 17:47:52,293 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:47:52,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 82 events. 7/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2023-01-27 17:47:52,296 INFO L119 LiptonReduction]: Number of co-enabled transitions 988 [2023-01-27 17:47:55,254 INFO L134 LiptonReduction]: Checked pairs total: 1018 [2023-01-27 17:47:55,254 INFO L136 LiptonReduction]: Total number of compositions: 77 [2023-01-27 17:47:55,265 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:47:55,269 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@624c752f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:47:55,269 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 17:47:55,272 INFO L130 PetriNetUnfolder]: 1/10 cut-off events. [2023-01-27 17:47:55,272 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:47:55,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:47:55,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 17:47:55,289 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-27 17:47:55,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:47:55,293 INFO L85 PathProgramCache]: Analyzing trace with hash 339243402, now seen corresponding path program 1 times [2023-01-27 17:47:55,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:47:55,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603453060] [2023-01-27 17:47:55,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:47:55,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:47:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:47:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:47:55,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:47:55,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603453060] [2023-01-27 17:47:55,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603453060] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:47:55,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:47:55,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 17:47:55,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723094697] [2023-01-27 17:47:55,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:47:55,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-27 17:47:55,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:47:55,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-27 17:47:55,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-27 17:47:55,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 149 [2023-01-27 17:47:55,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 25 flow. Second operand has 2 states, 2 states have (on average 65.5) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:47:55,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:47:55,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 149 [2023-01-27 17:47:55,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:47:55,692 INFO L130 PetriNetUnfolder]: 7/19 cut-off events. [2023-01-27 17:47:55,693 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:47:55,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 19 events. 7/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 4 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 30. Up to 19 conditions per place. [2023-01-27 17:47:55,694 INFO L137 encePairwiseOnDemand]: 147/149 looper letters, 7 selfloop transitions, 0 changer transitions 0/8 dead transitions. [2023-01-27 17:47:55,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 8 transitions, 35 flow [2023-01-27 17:47:55,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-27 17:47:55,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-27 17:47:55,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 135 transitions. [2023-01-27 17:47:55,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45302013422818793 [2023-01-27 17:47:55,721 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 135 transitions. [2023-01-27 17:47:55,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 135 transitions. [2023-01-27 17:47:55,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:47:55,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 135 transitions. [2023-01-27 17:47:55,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 67.5) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:47:55,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:47:55,747 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:47:55,749 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 25 flow. Second operand 2 states and 135 transitions. [2023-01-27 17:47:55,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 8 transitions, 35 flow [2023-01-27 17:47:55,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 8 transitions, 35 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 17:47:55,751 INFO L231 Difference]: Finished difference. Result has 11 places, 8 transitions, 21 flow [2023-01-27 17:47:55,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=21, PETRI_PLACES=11, PETRI_TRANSITIONS=8} [2023-01-27 17:47:55,755 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, -1 predicate places. [2023-01-27 17:47:55,759 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 8 transitions, 21 flow [2023-01-27 17:47:55,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 65.5) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:47:55,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:47:55,760 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-27 17:47:55,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 17:47:55,761 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-27 17:47:55,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:47:55,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1926557800, now seen corresponding path program 1 times [2023-01-27 17:47:55,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:47:55,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631851790] [2023-01-27 17:47:55,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:47:55,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:47:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:47:55,815 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:47:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:47:55,867 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:47:55,868 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:47:55,869 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-01-27 17:47:55,873 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-01-27 17:47:55,873 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-01-27 17:47:55,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 17:47:55,874 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 17:47:55,891 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:47:55,891 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 17:47:55,931 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:47:55,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 111 transitions, 234 flow [2023-01-27 17:47:55,974 INFO L130 PetriNetUnfolder]: 13/133 cut-off events. [2023-01-27 17:47:55,975 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:47:55,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 133 events. 13/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 221 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 88. Up to 6 conditions per place. [2023-01-27 17:47:55,976 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 111 transitions, 234 flow [2023-01-27 17:47:55,993 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 111 transitions, 234 flow [2023-01-27 17:47:55,993 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:47:55,993 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 111 transitions, 234 flow [2023-01-27 17:47:55,993 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 111 transitions, 234 flow [2023-01-27 17:47:55,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 111 transitions, 234 flow [2023-01-27 17:47:56,019 INFO L130 PetriNetUnfolder]: 13/133 cut-off events. [2023-01-27 17:47:56,020 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:47:56,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 133 events. 13/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 221 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 88. Up to 6 conditions per place. [2023-01-27 17:47:56,040 INFO L119 LiptonReduction]: Number of co-enabled transitions 4940 [2023-01-27 17:47:58,391 INFO L134 LiptonReduction]: Checked pairs total: 8290 [2023-01-27 17:47:58,391 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-01-27 17:47:58,392 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:47:58,393 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@624c752f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:47:58,393 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 17:47:58,396 INFO L130 PetriNetUnfolder]: 2/20 cut-off events. [2023-01-27 17:47:58,396 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 17:47:58,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:47:58,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:47:58,396 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 17:47:58,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:47:58,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1541457953, now seen corresponding path program 1 times [2023-01-27 17:47:58,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:47:58,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898408417] [2023-01-27 17:47:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:47:58,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:47:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:47:58,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:47:58,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:47:58,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898408417] [2023-01-27 17:47:58,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898408417] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:47:58,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:47:58,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 17:47:58,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593444728] [2023-01-27 17:47:58,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:47:58,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:47:58,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:47:58,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:47:58,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:47:58,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 212 [2023-01-27 17:47:58,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:47:58,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:47:58,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 212 [2023-01-27 17:47:58,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:47:58,723 INFO L130 PetriNetUnfolder]: 409/676 cut-off events. [2023-01-27 17:47:58,723 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2023-01-27 17:47:58,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1381 conditions, 676 events. 409/676 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3087 event pairs, 181 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 854. Up to 428 conditions per place. [2023-01-27 17:47:58,746 INFO L137 encePairwiseOnDemand]: 205/212 looper letters, 35 selfloop transitions, 5 changer transitions 0/43 dead transitions. [2023-01-27 17:47:58,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 43 transitions, 183 flow [2023-01-27 17:47:58,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:47:58,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:47:58,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 286 transitions. [2023-01-27 17:47:58,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.449685534591195 [2023-01-27 17:47:58,752 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 286 transitions. [2023-01-27 17:47:58,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 286 transitions. [2023-01-27 17:47:58,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:47:58,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 286 transitions. [2023-01-27 17:47:58,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:47:58,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:47:58,756 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:47:58,757 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 68 flow. Second operand 3 states and 286 transitions. [2023-01-27 17:47:58,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 43 transitions, 183 flow [2023-01-27 17:47:58,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 43 transitions, 181 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-01-27 17:47:58,759 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 98 flow [2023-01-27 17:47:58,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2023-01-27 17:47:58,760 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-01-27 17:47:58,760 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 98 flow [2023-01-27 17:47:58,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:47:58,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:47:58,761 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-27 17:47:58,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 17:47:58,761 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 17:47:58,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:47:58,761 INFO L85 PathProgramCache]: Analyzing trace with hash 199702052, now seen corresponding path program 1 times [2023-01-27 17:47:58,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:47:58,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443738797] [2023-01-27 17:47:58,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:47:58,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:47:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:47:58,800 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:47:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:47:58,836 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:47:58,836 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:47:58,837 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-01-27 17:47:58,837 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-27 17:47:58,837 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-01-27 17:47:58,837 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-27 17:47:58,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 17:47:58,838 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 17:47:58,838 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:47:58,838 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 17:47:58,873 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:47:58,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 150 transitions, 321 flow [2023-01-27 17:47:58,900 INFO L130 PetriNetUnfolder]: 19/184 cut-off events. [2023-01-27 17:47:58,900 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 17:47:58,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 184 events. 19/184 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 421 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 137. Up to 8 conditions per place. [2023-01-27 17:47:58,901 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 150 transitions, 321 flow [2023-01-27 17:47:58,902 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 150 transitions, 321 flow [2023-01-27 17:47:58,903 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:47:58,903 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 150 transitions, 321 flow [2023-01-27 17:47:58,903 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 150 transitions, 321 flow [2023-01-27 17:47:58,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 150 transitions, 321 flow [2023-01-27 17:47:58,920 INFO L130 PetriNetUnfolder]: 19/184 cut-off events. [2023-01-27 17:47:58,921 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 17:47:58,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 184 events. 19/184 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 421 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 137. Up to 8 conditions per place. [2023-01-27 17:47:58,926 INFO L119 LiptonReduction]: Number of co-enabled transitions 11856 [2023-01-27 17:48:01,487 INFO L134 LiptonReduction]: Checked pairs total: 20053 [2023-01-27 17:48:01,488 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-01-27 17:48:01,489 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:48:01,490 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@624c752f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:48:01,490 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 17:48:01,498 INFO L130 PetriNetUnfolder]: 2/23 cut-off events. [2023-01-27 17:48:01,498 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 17:48:01,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:48:01,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:48:01,499 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 17:48:01,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:48:01,499 INFO L85 PathProgramCache]: Analyzing trace with hash 613531324, now seen corresponding path program 1 times [2023-01-27 17:48:01,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:48:01,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524620456] [2023-01-27 17:48:01,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:48:01,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:48:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:48:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:48:01,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:48:01,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524620456] [2023-01-27 17:48:01,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524620456] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:48:01,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:48:01,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 17:48:01,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102396855] [2023-01-27 17:48:01,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:48:01,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:48:01,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:48:01,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:48:01,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:48:01,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 285 [2023-01-27 17:48:01,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:01,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:48:01,588 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 285 [2023-01-27 17:48:01,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:48:02,632 INFO L130 PetriNetUnfolder]: 6884/9518 cut-off events. [2023-01-27 17:48:02,632 INFO L131 PetriNetUnfolder]: For 844/844 co-relation queries the response was YES. [2023-01-27 17:48:02,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19556 conditions, 9518 events. 6884/9518 cut-off events. For 844/844 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 52479 event pairs, 3065 based on Foata normal form. 0/7151 useless extension candidates. Maximal degree in co-relation 7148. Up to 5934 conditions per place. [2023-01-27 17:48:02,748 INFO L137 encePairwiseOnDemand]: 277/285 looper letters, 57 selfloop transitions, 6 changer transitions 0/66 dead transitions. [2023-01-27 17:48:02,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 66 transitions, 291 flow [2023-01-27 17:48:02,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:48:02,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:48:02,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2023-01-27 17:48:02,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45614035087719296 [2023-01-27 17:48:02,750 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2023-01-27 17:48:02,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2023-01-27 17:48:02,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:48:02,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2023-01-27 17:48:02,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:02,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:02,753 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:02,753 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 99 flow. Second operand 3 states and 390 transitions. [2023-01-27 17:48:02,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 66 transitions, 291 flow [2023-01-27 17:48:02,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 66 transitions, 283 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-01-27 17:48:02,757 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 133 flow [2023-01-27 17:48:02,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2023-01-27 17:48:02,759 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-01-27 17:48:02,759 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 133 flow [2023-01-27 17:48:02,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:02,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:48:02,759 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:48:02,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 17:48:02,761 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 17:48:02,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:48:02,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1120141961, now seen corresponding path program 1 times [2023-01-27 17:48:02,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:48:02,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246402652] [2023-01-27 17:48:02,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:48:02,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:48:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:48:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 17:48:02,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:48:02,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246402652] [2023-01-27 17:48:02,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246402652] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:48:02,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:48:02,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 17:48:02,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117066745] [2023-01-27 17:48:02,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:48:02,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:48:02,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:48:02,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:48:02,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:48:02,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 285 [2023-01-27 17:48:02,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:02,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:48:02,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 285 [2023-01-27 17:48:02,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:48:04,360 INFO L130 PetriNetUnfolder]: 10284/14273 cut-off events. [2023-01-27 17:48:04,360 INFO L131 PetriNetUnfolder]: For 5066/5066 co-relation queries the response was YES. [2023-01-27 17:48:04,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32867 conditions, 14273 events. 10284/14273 cut-off events. For 5066/5066 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 81885 event pairs, 4618 based on Foata normal form. 0/11391 useless extension candidates. Maximal degree in co-relation 24229. Up to 8735 conditions per place. [2023-01-27 17:48:04,533 INFO L137 encePairwiseOnDemand]: 278/285 looper letters, 61 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2023-01-27 17:48:04,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 72 transitions, 364 flow [2023-01-27 17:48:04,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:48:04,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:48:04,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 387 transitions. [2023-01-27 17:48:04,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45263157894736844 [2023-01-27 17:48:04,536 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 387 transitions. [2023-01-27 17:48:04,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 387 transitions. [2023-01-27 17:48:04,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:48:04,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 387 transitions. [2023-01-27 17:48:04,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:04,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:04,538 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:04,538 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 133 flow. Second operand 3 states and 387 transitions. [2023-01-27 17:48:04,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 72 transitions, 364 flow [2023-01-27 17:48:04,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 72 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 17:48:04,566 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 181 flow [2023-01-27 17:48:04,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2023-01-27 17:48:04,568 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2023-01-27 17:48:04,568 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 181 flow [2023-01-27 17:48:04,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:04,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:48:04,569 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-27 17:48:04,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 17:48:04,569 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 17:48:04,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:48:04,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1228727841, now seen corresponding path program 1 times [2023-01-27 17:48:04,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:48:04,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7131328] [2023-01-27 17:48:04,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:48:04,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:48:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:48:04,595 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:48:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:48:04,608 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:48:04,609 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:48:04,609 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-01-27 17:48:04,609 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-27 17:48:04,609 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-27 17:48:04,609 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-27 17:48:04,609 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-27 17:48:04,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 17:48:04,610 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 17:48:04,610 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:48:04,610 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 17:48:04,654 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:48:04,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 189 transitions, 410 flow [2023-01-27 17:48:04,686 INFO L130 PetriNetUnfolder]: 25/235 cut-off events. [2023-01-27 17:48:04,686 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 17:48:04,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 235 events. 25/235 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 642 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 192. Up to 10 conditions per place. [2023-01-27 17:48:04,688 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 189 transitions, 410 flow [2023-01-27 17:48:04,689 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 177 places, 189 transitions, 410 flow [2023-01-27 17:48:04,689 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:48:04,689 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 177 places, 189 transitions, 410 flow [2023-01-27 17:48:04,690 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 177 places, 189 transitions, 410 flow [2023-01-27 17:48:04,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 189 transitions, 410 flow [2023-01-27 17:48:04,711 INFO L130 PetriNetUnfolder]: 25/235 cut-off events. [2023-01-27 17:48:04,711 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 17:48:04,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 235 events. 25/235 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 642 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 192. Up to 10 conditions per place. [2023-01-27 17:48:04,720 INFO L119 LiptonReduction]: Number of co-enabled transitions 21736 [2023-01-27 17:48:07,766 INFO L134 LiptonReduction]: Checked pairs total: 38018 [2023-01-27 17:48:07,766 INFO L136 LiptonReduction]: Total number of compositions: 173 [2023-01-27 17:48:07,769 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:48:07,769 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@624c752f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:48:07,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-27 17:48:07,771 INFO L130 PetriNetUnfolder]: 2/23 cut-off events. [2023-01-27 17:48:07,771 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 17:48:07,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:48:07,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:48:07,771 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 17:48:07,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:48:07,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1638488913, now seen corresponding path program 1 times [2023-01-27 17:48:07,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:48:07,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924516225] [2023-01-27 17:48:07,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:48:07,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:48:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:48:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:48:07,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:48:07,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924516225] [2023-01-27 17:48:07,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924516225] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:48:07,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:48:07,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 17:48:07,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245522207] [2023-01-27 17:48:07,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:48:07,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:48:07,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:48:07,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:48:07,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:48:07,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 362 [2023-01-27 17:48:07,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:07,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:48:07,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 362 [2023-01-27 17:48:07,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:48:17,003 INFO L130 PetriNetUnfolder]: 87698/111758 cut-off events. [2023-01-27 17:48:17,003 INFO L131 PetriNetUnfolder]: For 14044/14044 co-relation queries the response was YES. [2023-01-27 17:48:17,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229982 conditions, 111758 events. 87698/111758 cut-off events. For 14044/14044 co-relation queries the response was YES. Maximal size of possible extension queue 3848. Compared 651744 event pairs, 40629 based on Foata normal form. 0/82627 useless extension candidates. Maximal degree in co-relation 19431. Up to 71030 conditions per place. [2023-01-27 17:48:18,211 INFO L137 encePairwiseOnDemand]: 353/362 looper letters, 78 selfloop transitions, 7 changer transitions 0/88 dead transitions. [2023-01-27 17:48:18,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 88 transitions, 399 flow [2023-01-27 17:48:18,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:48:18,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:48:18,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2023-01-27 17:48:18,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4539594843462247 [2023-01-27 17:48:18,227 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2023-01-27 17:48:18,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2023-01-27 17:48:18,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:48:18,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2023-01-27 17:48:18,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:18,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:18,230 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:18,231 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 132 flow. Second operand 3 states and 493 transitions. [2023-01-27 17:48:18,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 88 transitions, 399 flow [2023-01-27 17:48:18,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 88 transitions, 381 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-01-27 17:48:18,261 INFO L231 Difference]: Finished difference. Result has 54 places, 54 transitions, 168 flow [2023-01-27 17:48:18,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=54, PETRI_TRANSITIONS=54} [2023-01-27 17:48:18,262 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-01-27 17:48:18,262 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 54 transitions, 168 flow [2023-01-27 17:48:18,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:18,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:48:18,263 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:48:18,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 17:48:18,263 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 17:48:18,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:48:18,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1866340184, now seen corresponding path program 1 times [2023-01-27 17:48:18,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:48:18,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628213773] [2023-01-27 17:48:18,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:48:18,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:48:18,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:48:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 17:48:18,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:48:18,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628213773] [2023-01-27 17:48:18,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628213773] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:48:18,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:48:18,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 17:48:18,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841092946] [2023-01-27 17:48:18,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:48:18,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:48:18,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:48:18,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:48:18,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:48:18,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 362 [2023-01-27 17:48:18,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 54 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:18,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:48:18,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 362 [2023-01-27 17:48:18,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:48:30,349 INFO L130 PetriNetUnfolder]: 134508/171328 cut-off events. [2023-01-27 17:48:30,349 INFO L131 PetriNetUnfolder]: For 54473/54473 co-relation queries the response was YES. [2023-01-27 17:48:30,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388925 conditions, 171328 events. 134508/171328 cut-off events. For 54473/54473 co-relation queries the response was YES. Maximal size of possible extension queue 6013. Compared 1043390 event pairs, 62692 based on Foata normal form. 0/133103 useless extension candidates. Maximal degree in co-relation 285700. Up to 108463 conditions per place. [2023-01-27 17:48:31,538 INFO L137 encePairwiseOnDemand]: 354/362 looper letters, 83 selfloop transitions, 10 changer transitions 0/96 dead transitions. [2023-01-27 17:48:31,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 96 transitions, 482 flow [2023-01-27 17:48:31,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:48:31,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:48:31,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2023-01-27 17:48:31,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45119705340699817 [2023-01-27 17:48:31,563 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2023-01-27 17:48:31,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2023-01-27 17:48:31,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:48:31,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2023-01-27 17:48:31,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:31,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:31,566 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:31,566 INFO L175 Difference]: Start difference. First operand has 54 places, 54 transitions, 168 flow. Second operand 3 states and 490 transitions. [2023-01-27 17:48:31,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 96 transitions, 482 flow [2023-01-27 17:48:31,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 96 transitions, 456 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 17:48:31,842 INFO L231 Difference]: Finished difference. Result has 56 places, 61 transitions, 234 flow [2023-01-27 17:48:31,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=56, PETRI_TRANSITIONS=61} [2023-01-27 17:48:31,847 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2023-01-27 17:48:31,847 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 61 transitions, 234 flow [2023-01-27 17:48:31,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:31,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:48:31,848 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:48:31,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 17:48:31,848 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 17:48:31,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:48:31,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1854475387, now seen corresponding path program 1 times [2023-01-27 17:48:31,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:48:31,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419751707] [2023-01-27 17:48:31,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:48:31,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:48:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:48:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 17:48:31,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:48:31,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419751707] [2023-01-27 17:48:31,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419751707] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:48:31,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:48:31,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 17:48:31,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554524210] [2023-01-27 17:48:31,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:48:31,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:48:31,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:48:31,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:48:31,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:48:31,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 362 [2023-01-27 17:48:31,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 61 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:31,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:48:31,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 362 [2023-01-27 17:48:31,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:48:49,727 INFO L130 PetriNetUnfolder]: 189643/241906 cut-off events. [2023-01-27 17:48:49,728 INFO L131 PetriNetUnfolder]: For 124958/124958 co-relation queries the response was YES. [2023-01-27 17:48:50,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584691 conditions, 241906 events. 189643/241906 cut-off events. For 124958/124958 co-relation queries the response was YES. Maximal size of possible extension queue 8646. Compared 1510665 event pairs, 94843 based on Foata normal form. 0/192523 useless extension candidates. Maximal degree in co-relation 426541. Up to 162550 conditions per place. [2023-01-27 17:48:51,788 INFO L137 encePairwiseOnDemand]: 354/362 looper letters, 88 selfloop transitions, 15 changer transitions 0/106 dead transitions. [2023-01-27 17:48:51,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 106 transitions, 607 flow [2023-01-27 17:48:51,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:48:51,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:48:51,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2023-01-27 17:48:51,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44935543278084716 [2023-01-27 17:48:51,792 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2023-01-27 17:48:51,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2023-01-27 17:48:51,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:48:51,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2023-01-27 17:48:51,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:51,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:51,795 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:51,795 INFO L175 Difference]: Start difference. First operand has 56 places, 61 transitions, 234 flow. Second operand 3 states and 488 transitions. [2023-01-27 17:48:51,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 106 transitions, 607 flow [2023-01-27 17:48:52,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 106 transitions, 571 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 17:48:52,811 INFO L231 Difference]: Finished difference. Result has 58 places, 71 transitions, 348 flow [2023-01-27 17:48:52,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=348, PETRI_PLACES=58, PETRI_TRANSITIONS=71} [2023-01-27 17:48:52,811 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2023-01-27 17:48:52,811 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 71 transitions, 348 flow [2023-01-27 17:48:52,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:52,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:48:52,812 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:48:52,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-27 17:48:52,812 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 17:48:52,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:48:52,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1749691500, now seen corresponding path program 1 times [2023-01-27 17:48:52,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:48:52,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343502867] [2023-01-27 17:48:52,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:48:52,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:48:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:48:52,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 17:48:52,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:48:52,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343502867] [2023-01-27 17:48:52,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343502867] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:48:52,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:48:52,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 17:48:52,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837830760] [2023-01-27 17:48:52,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:48:52,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 17:48:52,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:48:52,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 17:48:52,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 17:48:52,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 362 [2023-01-27 17:48:52,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 71 transitions, 348 flow. Second operand has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:52,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:48:52,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 362 [2023-01-27 17:48:52,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:49:32,705 INFO L130 PetriNetUnfolder]: 383604/491463 cut-off events. [2023-01-27 17:49:32,705 INFO L131 PetriNetUnfolder]: For 355855/355855 co-relation queries the response was YES. [2023-01-27 17:49:33,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1278445 conditions, 491463 events. 383604/491463 cut-off events. For 355855/355855 co-relation queries the response was YES. Maximal size of possible extension queue 14873. Compared 3300713 event pairs, 149711 based on Foata normal form. 0/413639 useless extension candidates. Maximal degree in co-relation 1110092. Up to 251448 conditions per place. [2023-01-27 17:49:36,089 INFO L137 encePairwiseOnDemand]: 350/362 looper letters, 257 selfloop transitions, 76 changer transitions 0/336 dead transitions. [2023-01-27 17:49:36,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 336 transitions, 2214 flow [2023-01-27 17:49:36,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 17:49:36,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 17:49:36,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1308 transitions. [2023-01-27 17:49:36,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4516574585635359 [2023-01-27 17:49:36,093 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1308 transitions. [2023-01-27 17:49:36,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1308 transitions. [2023-01-27 17:49:36,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:49:36,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1308 transitions. [2023-01-27 17:49:36,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 163.5) internal successors, (1308), 8 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:49:36,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 362.0) internal successors, (3258), 9 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:49:36,131 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 362.0) internal successors, (3258), 9 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:49:36,131 INFO L175 Difference]: Start difference. First operand has 58 places, 71 transitions, 348 flow. Second operand 8 states and 1308 transitions. [2023-01-27 17:49:36,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 336 transitions, 2214 flow [2023-01-27 17:49:53,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 336 transitions, 2074 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 17:49:53,016 INFO L231 Difference]: Finished difference. Result has 69 places, 154 transitions, 1238 flow [2023-01-27 17:49:53,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1238, PETRI_PLACES=69, PETRI_TRANSITIONS=154} [2023-01-27 17:49:53,017 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 18 predicate places. [2023-01-27 17:49:53,017 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 154 transitions, 1238 flow [2023-01-27 17:49:53,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:49:53,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:49:53,018 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:49:53,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 17:49:53,018 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 17:49:53,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:49:53,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1589830436, now seen corresponding path program 2 times [2023-01-27 17:49:53,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:49:53,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635131542] [2023-01-27 17:49:53,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:49:53,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:49:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:49:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 17:49:53,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:49:53,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635131542] [2023-01-27 17:49:53,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635131542] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:49:53,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:49:53,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 17:49:53,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806007769] [2023-01-27 17:49:53,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:49:53,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 17:49:53,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:49:53,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 17:49:53,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 17:49:53,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 362 [2023-01-27 17:49:53,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 154 transitions, 1238 flow. Second operand has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:49:53,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:49:53,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 362 [2023-01-27 17:49:53,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:51:15,927 INFO L130 PetriNetUnfolder]: 608733/778435 cut-off events. [2023-01-27 17:51:15,927 INFO L131 PetriNetUnfolder]: For 990276/990276 co-relation queries the response was YES. [2023-01-27 17:51:18,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2210504 conditions, 778435 events. 608733/778435 cut-off events. For 990276/990276 co-relation queries the response was YES. Maximal size of possible extension queue 25861. Compared 5523478 event pairs, 185441 based on Foata normal form. 3144/658845 useless extension candidates. Maximal degree in co-relation 2031641. Up to 338414 conditions per place. [2023-01-27 17:51:22,144 INFO L137 encePairwiseOnDemand]: 350/362 looper letters, 281 selfloop transitions, 145 changer transitions 0/429 dead transitions. [2023-01-27 17:51:22,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 429 transitions, 3686 flow [2023-01-27 17:51:22,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 17:51:22,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 17:51:22,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1149 transitions. [2023-01-27 17:51:22,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45343330702446727 [2023-01-27 17:51:22,154 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1149 transitions. [2023-01-27 17:51:22,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1149 transitions. [2023-01-27 17:51:22,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:51:22,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1149 transitions. [2023-01-27 17:51:22,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 164.14285714285714) internal successors, (1149), 7 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:51:22,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 362.0) internal successors, (2896), 8 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:51:22,170 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 362.0) internal successors, (2896), 8 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:51:22,177 INFO L175 Difference]: Start difference. First operand has 69 places, 154 transitions, 1238 flow. Second operand 7 states and 1149 transitions. [2023-01-27 17:51:22,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 429 transitions, 3686 flow [2023-01-27 17:52:56,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 429 transitions, 3564 flow, removed 61 selfloop flow, removed 0 redundant places. [2023-01-27 17:52:56,099 INFO L231 Difference]: Finished difference. Result has 81 places, 251 transitions, 2741 flow [2023-01-27 17:52:56,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=1178, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2741, PETRI_PLACES=81, PETRI_TRANSITIONS=251} [2023-01-27 17:52:56,100 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 30 predicate places. [2023-01-27 17:52:56,100 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 251 transitions, 2741 flow [2023-01-27 17:52:56,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:52:56,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:52:56,101 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:52:56,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-27 17:52:56,101 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 17:52:56,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:52:56,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1284808247, now seen corresponding path program 1 times [2023-01-27 17:52:56,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:52:56,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096724697] [2023-01-27 17:52:56,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:52:56,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:52:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:52:56,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 17:52:56,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:52:56,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096724697] [2023-01-27 17:52:56,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096724697] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:52:56,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:52:56,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 17:52:56,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568164387] [2023-01-27 17:52:56,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:52:56,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 17:52:56,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:52:56,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 17:52:56,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 17:52:56,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 362 [2023-01-27 17:52:56,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 251 transitions, 2741 flow. Second operand has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:52:56,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:52:56,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 362 [2023-01-27 17:52:56,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand