/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 07:53:17,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 07:53:17,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 07:53:17,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 07:53:17,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 07:53:17,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 07:53:17,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 07:53:17,926 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 07:53:17,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 07:53:17,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 07:53:17,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 07:53:17,932 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 07:53:17,932 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 07:53:17,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 07:53:17,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 07:53:17,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 07:53:17,934 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 07:53:17,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 07:53:17,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 07:53:17,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 07:53:17,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 07:53:17,940 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 07:53:17,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 07:53:17,942 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 07:53:17,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-28 07:53:17,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 07:53:17,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 07:53:17,957 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 07:53:17,958 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 07:53:17,981 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 07:53:17,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 07:53:17,982 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 07:53:17,982 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 07:53:17,983 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 07:53:17,983 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 07:53:17,983 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 07:53:17,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 07:53:17,983 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 07:53:17,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 07:53:17,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 07:53:17,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 07:53:17,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 07:53:17,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 07:53:17,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 07:53:17,984 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 07:53:17,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 07:53:17,985 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 07:53:17,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 07:53:17,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 07:53:17,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 07:53:17,985 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 07:53:17,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 07:53:17,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:53:17,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 07:53:17,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 07:53:17,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 07:53:17,986 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 07:53:17,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 07:53:17,986 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 07:53:17,986 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 07:53:17,986 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 07:53:18,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 07:53:18,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 07:53:18,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 07:53:18,160 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 07:53:18,160 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 07:53:18,161 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-01-28 07:53:19,218 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 07:53:19,475 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 07:53:19,476 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-01-28 07:53:19,501 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b2673d80/48d4840dfe2c488e80f355a4fa4a7fe1/FLAG978abb572 [2023-01-28 07:53:19,515 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b2673d80/48d4840dfe2c488e80f355a4fa4a7fe1 [2023-01-28 07:53:19,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 07:53:19,518 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 07:53:19,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 07:53:19,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 07:53:19,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 07:53:19,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:53:19" (1/1) ... [2023-01-28 07:53:19,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a6143b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:19, skipping insertion in model container [2023-01-28 07:53:19,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:53:19" (1/1) ... [2023-01-28 07:53:19,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 07:53:19,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 07:53:19,726 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i[30176,30189] [2023-01-28 07:53:19,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:53:19,769 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 07:53:19,820 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i[30176,30189] [2023-01-28 07:53:19,826 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:53:19,860 INFO L208 MainTranslator]: Completed translation [2023-01-28 07:53:19,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:19 WrapperNode [2023-01-28 07:53:19,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 07:53:19,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 07:53:19,862 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 07:53:19,862 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 07:53:19,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:19" (1/1) ... [2023-01-28 07:53:19,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:19" (1/1) ... [2023-01-28 07:53:19,888 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2023-01-28 07:53:19,888 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 07:53:19,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 07:53:19,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 07:53:19,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 07:53:19,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:19" (1/1) ... [2023-01-28 07:53:19,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:19" (1/1) ... [2023-01-28 07:53:19,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:19" (1/1) ... [2023-01-28 07:53:19,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:19" (1/1) ... [2023-01-28 07:53:19,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:19" (1/1) ... [2023-01-28 07:53:19,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:19" (1/1) ... [2023-01-28 07:53:19,904 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:19" (1/1) ... [2023-01-28 07:53:19,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:19" (1/1) ... [2023-01-28 07:53:19,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 07:53:19,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 07:53:19,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 07:53:19,907 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 07:53:19,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:19" (1/1) ... [2023-01-28 07:53:19,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:53:19,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:53:19,930 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-28 07:53:19,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 07:53:19,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 07:53:19,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 07:53:19,961 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 07:53:19,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 07:53:19,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 07:53:19,961 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-28 07:53:19,961 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-28 07:53:19,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 07:53:19,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 07:53:19,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 07:53:19,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 07:53:19,962 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 07:53:20,059 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 07:53:20,061 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 07:53:20,248 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 07:53:20,253 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 07:53:20,253 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-01-28 07:53:20,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:53:20 BoogieIcfgContainer [2023-01-28 07:53:20,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 07:53:20,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 07:53:20,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 07:53:20,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 07:53:20,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 07:53:19" (1/3) ... [2023-01-28 07:53:20,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2741ca1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:53:20, skipping insertion in model container [2023-01-28 07:53:20,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:53:19" (2/3) ... [2023-01-28 07:53:20,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2741ca1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:53:20, skipping insertion in model container [2023-01-28 07:53:20,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:53:20" (3/3) ... [2023-01-28 07:53:20,265 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_24-sound_lock_racing.i [2023-01-28 07:53:20,290 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 07:53:20,291 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 07:53:20,291 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 07:53:20,330 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-28 07:53:20,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 114 transitions, 236 flow [2023-01-28 07:53:20,407 INFO L130 PetriNetUnfolder]: 18/147 cut-off events. [2023-01-28 07:53:20,407 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:53:20,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 147 events. 18/147 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 306 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-01-28 07:53:20,411 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 114 transitions, 236 flow [2023-01-28 07:53:20,415 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 109 transitions, 223 flow [2023-01-28 07:53:20,420 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:53:20,427 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 109 transitions, 223 flow [2023-01-28 07:53:20,429 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 109 transitions, 223 flow [2023-01-28 07:53:20,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 109 transitions, 223 flow [2023-01-28 07:53:20,449 INFO L130 PetriNetUnfolder]: 17/142 cut-off events. [2023-01-28 07:53:20,449 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:53:20,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 142 events. 17/142 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 289 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-01-28 07:53:20,451 INFO L119 LiptonReduction]: Number of co-enabled transitions 2184 [2023-01-28 07:53:23,467 INFO L134 LiptonReduction]: Checked pairs total: 3935 [2023-01-28 07:53:23,467 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-01-28 07:53:23,478 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:53:23,482 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;@6bea6955, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:53:23,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:53:23,485 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-01-28 07:53:23,485 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:53:23,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:53:23,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:53:23,486 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:53:23,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:53:23,490 INFO L85 PathProgramCache]: Analyzing trace with hash 13523618, now seen corresponding path program 1 times [2023-01-28 07:53:23,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:53:23,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705667124] [2023-01-28 07:53:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:23,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:53:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:23,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:53:23,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705667124] [2023-01-28 07:53:23,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705667124] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:53:23,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:53:23,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 07:53:23,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750428005] [2023-01-28 07:53:23,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:53:23,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:53:23,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:53:23,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:53:23,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:53:23,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 210 [2023-01-28 07:53:23,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 32 transitions, 69 flow. Second operand has 3 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) [2023-01-28 07:53:23,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:53:23,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 210 [2023-01-28 07:53:23,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:53:23,743 INFO L130 PetriNetUnfolder]: 69/171 cut-off events. [2023-01-28 07:53:23,744 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:53:23,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 171 events. 69/171 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 548 event pairs, 21 based on Foata normal form. 9/163 useless extension candidates. Maximal degree in co-relation 316. Up to 114 conditions per place. [2023-01-28 07:53:23,745 INFO L137 encePairwiseOnDemand]: 197/210 looper letters, 16 selfloop transitions, 2 changer transitions 10/29 dead transitions. [2023-01-28 07:53:23,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 29 transitions, 117 flow [2023-01-28 07:53:23,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:53:23,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:53:23,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2023-01-28 07:53:23,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2023-01-28 07:53:23,755 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2023-01-28 07:53:23,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2023-01-28 07:53:23,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:53:23,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2023-01-28 07:53:23,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:23,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:23,764 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:23,766 INFO L175 Difference]: Start difference. First operand has 26 places, 32 transitions, 69 flow. Second operand 3 states and 324 transitions. [2023-01-28 07:53:23,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 29 transitions, 117 flow [2023-01-28 07:53:23,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 117 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:53:23,769 INFO L231 Difference]: Finished difference. Result has 27 places, 16 transitions, 43 flow [2023-01-28 07:53:23,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=43, PETRI_PLACES=27, PETRI_TRANSITIONS=16} [2023-01-28 07:53:23,772 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 1 predicate places. [2023-01-28 07:53:23,772 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 16 transitions, 43 flow [2023-01-28 07:53:23,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-01-28 07:53:23,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:53:23,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:53:23,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 07:53:23,773 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:53:23,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:53:23,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1336112677, now seen corresponding path program 1 times [2023-01-28 07:53:23,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:53:23,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218361931] [2023-01-28 07:53:23,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:23,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:53:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:23,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 07:53:23,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:53:23,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218361931] [2023-01-28 07:53:23,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218361931] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:53:23,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:53:23,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 07:53:23,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410364677] [2023-01-28 07:53:23,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:53:23,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 07:53:23,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:53:23,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 07:53:23,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-28 07:53:23,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 210 [2023-01-28 07:53:23,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 16 transitions, 43 flow. Second operand has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:23,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:53:23,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 210 [2023-01-28 07:53:23,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:53:23,963 INFO L130 PetriNetUnfolder]: 27/79 cut-off events. [2023-01-28 07:53:23,964 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:53:23,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 79 events. 27/79 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 173 event pairs, 12 based on Foata normal form. 7/76 useless extension candidates. Maximal degree in co-relation 155. Up to 40 conditions per place. [2023-01-28 07:53:23,965 INFO L137 encePairwiseOnDemand]: 204/210 looper letters, 12 selfloop transitions, 6 changer transitions 2/21 dead transitions. [2023-01-28 07:53:23,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 93 flow [2023-01-28 07:53:23,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 07:53:23,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 07:53:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 331 transitions. [2023-01-28 07:53:23,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39404761904761904 [2023-01-28 07:53:23,970 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 331 transitions. [2023-01-28 07:53:23,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 331 transitions. [2023-01-28 07:53:23,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:53:23,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 331 transitions. [2023-01-28 07:53:23,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 82.75) internal successors, (331), 4 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:23,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:23,975 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:23,975 INFO L175 Difference]: Start difference. First operand has 27 places, 16 transitions, 43 flow. Second operand 4 states and 331 transitions. [2023-01-28 07:53:23,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 93 flow [2023-01-28 07:53:23,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 89 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 07:53:23,976 INFO L231 Difference]: Finished difference. Result has 23 places, 16 transitions, 51 flow [2023-01-28 07:53:23,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=51, PETRI_PLACES=23, PETRI_TRANSITIONS=16} [2023-01-28 07:53:23,978 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -3 predicate places. [2023-01-28 07:53:23,978 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 16 transitions, 51 flow [2023-01-28 07:53:23,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:23,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:53:23,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:53:23,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 07:53:23,979 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:53:23,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:53:23,981 INFO L85 PathProgramCache]: Analyzing trace with hash -839269820, now seen corresponding path program 1 times [2023-01-28 07:53:23,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:53:23,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142508723] [2023-01-28 07:53:23,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:23,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:53:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:24,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:53:24,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142508723] [2023-01-28 07:53:24,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142508723] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:53:24,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240820330] [2023-01-28 07:53:24,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:24,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:53:24,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:53:24,089 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:53:24,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 07:53:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:24,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:53:24,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:53:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:24,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:53:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:24,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240820330] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:53:24,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:53:24,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-01-28 07:53:24,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896711461] [2023-01-28 07:53:24,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:53:24,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 07:53:24,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:53:24,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 07:53:24,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-01-28 07:53:24,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 210 [2023-01-28 07:53:24,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 16 transitions, 51 flow. Second operand has 6 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:24,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:53:24,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 210 [2023-01-28 07:53:24,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:53:24,351 INFO L130 PetriNetUnfolder]: 16/46 cut-off events. [2023-01-28 07:53:24,351 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-01-28 07:53:24,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 46 events. 16/46 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 84 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 100. Up to 34 conditions per place. [2023-01-28 07:53:24,352 INFO L137 encePairwiseOnDemand]: 207/210 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-01-28 07:53:24,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 22 transitions, 110 flow [2023-01-28 07:53:24,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 07:53:24,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 07:53:24,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 395 transitions. [2023-01-28 07:53:24,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2023-01-28 07:53:24,353 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 395 transitions. [2023-01-28 07:53:24,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 395 transitions. [2023-01-28 07:53:24,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:53:24,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 395 transitions. [2023-01-28 07:53:24,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 98.75) internal successors, (395), 4 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:24,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:24,356 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:24,356 INFO L175 Difference]: Start difference. First operand has 23 places, 16 transitions, 51 flow. Second operand 4 states and 395 transitions. [2023-01-28 07:53:24,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 22 transitions, 110 flow [2023-01-28 07:53:24,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 22 transitions, 89 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 07:53:24,356 INFO L231 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2023-01-28 07:53:24,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=19, PETRI_TRANSITIONS=0} [2023-01-28 07:53:24,357 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -7 predicate places. [2023-01-28 07:53:24,357 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2023-01-28 07:53:24,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:24,359 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:53:24,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-28 07:53:24,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:53:24,566 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-28 07:53:24,568 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:53:24,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 114 transitions, 236 flow [2023-01-28 07:53:24,579 INFO L130 PetriNetUnfolder]: 18/147 cut-off events. [2023-01-28 07:53:24,579 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:53:24,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 147 events. 18/147 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 306 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-01-28 07:53:24,579 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 114 transitions, 236 flow [2023-01-28 07:53:24,580 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 109 transitions, 223 flow [2023-01-28 07:53:24,580 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:53:24,580 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 109 transitions, 223 flow [2023-01-28 07:53:24,580 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 109 transitions, 223 flow [2023-01-28 07:53:24,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 109 transitions, 223 flow [2023-01-28 07:53:24,587 INFO L130 PetriNetUnfolder]: 17/142 cut-off events. [2023-01-28 07:53:24,587 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:53:24,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 142 events. 17/142 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 289 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-01-28 07:53:24,589 INFO L119 LiptonReduction]: Number of co-enabled transitions 2184 [2023-01-28 07:53:28,360 INFO L134 LiptonReduction]: Checked pairs total: 3950 [2023-01-28 07:53:28,360 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-01-28 07:53:28,363 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:53:28,367 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;@6bea6955, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:53:28,367 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:53:28,369 INFO L130 PetriNetUnfolder]: 2/21 cut-off events. [2023-01-28 07:53:28,370 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:53:28,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:53:28,370 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-28 07:53:28,370 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:53:28,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:53:28,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1200534038, now seen corresponding path program 1 times [2023-01-28 07:53:28,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:53:28,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706110853] [2023-01-28 07:53:28,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:28,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:53:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:53:28,401 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:53:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:53:28,427 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:53:28,427 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:53:28,427 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:53:28,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 07:53:28,428 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:53:28,428 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:53:28,428 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:53:28,429 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 07:53:28,446 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 07:53:28,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 144 transitions, 306 flow [2023-01-28 07:53:28,468 INFO L130 PetriNetUnfolder]: 32/234 cut-off events. [2023-01-28 07:53:28,469 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:53:28,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 234 events. 32/234 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 616 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2023-01-28 07:53:28,471 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 144 transitions, 306 flow [2023-01-28 07:53:28,472 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 144 transitions, 306 flow [2023-01-28 07:53:28,472 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:53:28,472 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 144 transitions, 306 flow [2023-01-28 07:53:28,473 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 144 transitions, 306 flow [2023-01-28 07:53:28,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 144 transitions, 306 flow [2023-01-28 07:53:28,483 INFO L130 PetriNetUnfolder]: 32/234 cut-off events. [2023-01-28 07:53:28,484 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:53:28,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 234 events. 32/234 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 616 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2023-01-28 07:53:28,487 INFO L119 LiptonReduction]: Number of co-enabled transitions 6552 [2023-01-28 07:53:31,374 INFO L134 LiptonReduction]: Checked pairs total: 16839 [2023-01-28 07:53:31,374 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-01-28 07:53:31,375 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:53:31,376 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;@6bea6955, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:53:31,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:53:31,377 INFO L130 PetriNetUnfolder]: 1/10 cut-off events. [2023-01-28 07:53:31,377 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:53:31,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:53:31,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:53:31,377 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:53:31,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:53:31,377 INFO L85 PathProgramCache]: Analyzing trace with hash 25344275, now seen corresponding path program 1 times [2023-01-28 07:53:31,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:53:31,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674870591] [2023-01-28 07:53:31,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:31,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:53:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:31,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:53:31,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674870591] [2023-01-28 07:53:31,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674870591] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:53:31,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:53:31,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 07:53:31,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929443069] [2023-01-28 07:53:31,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:53:31,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:53:31,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:53:31,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:53:31,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:53:31,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 253 [2023-01-28 07:53:31,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:31,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:53:31,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 253 [2023-01-28 07:53:31,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:53:31,623 INFO L130 PetriNetUnfolder]: 1818/3183 cut-off events. [2023-01-28 07:53:31,623 INFO L131 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2023-01-28 07:53:31,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6220 conditions, 3183 events. 1818/3183 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 17741 event pairs, 639 based on Foata normal form. 555/3420 useless extension candidates. Maximal degree in co-relation 4479. Up to 2714 conditions per place. [2023-01-28 07:53:31,632 INFO L137 encePairwiseOnDemand]: 235/253 looper letters, 33 selfloop transitions, 3 changer transitions 15/57 dead transitions. [2023-01-28 07:53:31,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 235 flow [2023-01-28 07:53:31,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:53:31,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:53:31,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 406 transitions. [2023-01-28 07:53:31,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349143610013175 [2023-01-28 07:53:31,633 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 406 transitions. [2023-01-28 07:53:31,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 406 transitions. [2023-01-28 07:53:31,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:53:31,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 406 transitions. [2023-01-28 07:53:31,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:31,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:31,636 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:31,636 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 128 flow. Second operand 3 states and 406 transitions. [2023-01-28 07:53:31,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 235 flow [2023-01-28 07:53:31,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 57 transitions, 235 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:53:31,639 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 89 flow [2023-01-28 07:53:31,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2023-01-28 07:53:31,640 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-01-28 07:53:31,641 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 89 flow [2023-01-28 07:53:31,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:31,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:53:31,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:53:31,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 07:53:31,641 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:53:31,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:53:31,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1454053430, now seen corresponding path program 1 times [2023-01-28 07:53:31,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:53:31,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371861416] [2023-01-28 07:53:31,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:31,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:53:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:31,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:31,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:53:31,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371861416] [2023-01-28 07:53:31,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371861416] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:53:31,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696004292] [2023-01-28 07:53:31,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:31,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:53:31,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:53:31,694 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:53:31,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 07:53:31,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:31,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:53:31,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:53:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:31,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:53:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:31,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696004292] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:53:31,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:53:31,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-01-28 07:53:31,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938515940] [2023-01-28 07:53:31,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:53:31,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 07:53:31,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:53:31,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 07:53:31,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-01-28 07:53:31,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 253 [2023-01-28 07:53:31,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 89 flow. Second operand has 6 states, 6 states have (on average 117.33333333333333) internal successors, (704), 6 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:31,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:53:31,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 253 [2023-01-28 07:53:31,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:53:31,879 INFO L130 PetriNetUnfolder]: 299/564 cut-off events. [2023-01-28 07:53:31,881 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-01-28 07:53:31,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1158 conditions, 564 events. 299/564 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2670 event pairs, 0 based on Foata normal form. 0/563 useless extension candidates. Maximal degree in co-relation 743. Up to 370 conditions per place. [2023-01-28 07:53:31,882 INFO L137 encePairwiseOnDemand]: 250/253 looper letters, 0 selfloop transitions, 0 changer transitions 54/54 dead transitions. [2023-01-28 07:53:31,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 54 transitions, 222 flow [2023-01-28 07:53:31,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 07:53:31,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 07:53:31,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 620 transitions. [2023-01-28 07:53:31,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4901185770750988 [2023-01-28 07:53:31,884 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 620 transitions. [2023-01-28 07:53:31,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 620 transitions. [2023-01-28 07:53:31,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:53:31,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 620 transitions. [2023-01-28 07:53:31,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:31,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 253.0) internal successors, (1518), 6 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:31,888 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 253.0) internal successors, (1518), 6 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:31,889 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 89 flow. Second operand 5 states and 620 transitions. [2023-01-28 07:53:31,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 54 transitions, 222 flow [2023-01-28 07:53:31,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 54 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 07:53:31,890 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-01-28 07:53:31,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-01-28 07:53:31,892 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2023-01-28 07:53:31,892 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-01-28 07:53:31,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.33333333333333) internal successors, (704), 6 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:31,892 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:53:31,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 07:53:32,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-01-28 07:53:32,097 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:53:32,098 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:53:32,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 144 transitions, 306 flow [2023-01-28 07:53:32,111 INFO L130 PetriNetUnfolder]: 32/234 cut-off events. [2023-01-28 07:53:32,111 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:53:32,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 234 events. 32/234 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 616 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2023-01-28 07:53:32,111 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 144 transitions, 306 flow [2023-01-28 07:53:32,112 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 144 transitions, 306 flow [2023-01-28 07:53:32,112 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:53:32,112 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 144 transitions, 306 flow [2023-01-28 07:53:32,112 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 144 transitions, 306 flow [2023-01-28 07:53:32,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 144 transitions, 306 flow [2023-01-28 07:53:32,126 INFO L130 PetriNetUnfolder]: 32/234 cut-off events. [2023-01-28 07:53:32,126 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:53:32,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 234 events. 32/234 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 616 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2023-01-28 07:53:32,129 INFO L119 LiptonReduction]: Number of co-enabled transitions 6552 [2023-01-28 07:53:35,726 INFO L134 LiptonReduction]: Checked pairs total: 16839 [2023-01-28 07:53:35,726 INFO L136 LiptonReduction]: Total number of compositions: 113 [2023-01-28 07:53:35,731 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:53:35,733 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;@6bea6955, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:53:35,733 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:53:35,736 INFO L130 PetriNetUnfolder]: 12/58 cut-off events. [2023-01-28 07:53:35,736 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 07:53:35,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:53:35,736 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-28 07:53:35,736 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:53:35,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:53:35,737 INFO L85 PathProgramCache]: Analyzing trace with hash 408421678, now seen corresponding path program 1 times [2023-01-28 07:53:35,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:53:35,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765885521] [2023-01-28 07:53:35,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:35,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:53:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:53:35,755 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:53:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:53:35,769 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:53:35,770 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:53:35,770 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:53:35,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 07:53:35,770 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:53:35,770 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:53:35,770 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:53:35,770 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 07:53:35,787 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 07:53:35,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 174 transitions, 378 flow [2023-01-28 07:53:35,810 INFO L130 PetriNetUnfolder]: 51/352 cut-off events. [2023-01-28 07:53:35,810 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:53:35,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 352 events. 51/352 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1075 event pairs, 1 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 242. Up to 16 conditions per place. [2023-01-28 07:53:35,811 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 174 transitions, 378 flow [2023-01-28 07:53:35,813 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 174 transitions, 378 flow [2023-01-28 07:53:35,813 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:53:35,813 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 174 transitions, 378 flow [2023-01-28 07:53:35,813 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 174 transitions, 378 flow [2023-01-28 07:53:35,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 174 transitions, 378 flow [2023-01-28 07:53:35,832 INFO L130 PetriNetUnfolder]: 51/352 cut-off events. [2023-01-28 07:53:35,832 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:53:35,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 352 events. 51/352 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1075 event pairs, 1 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 242. Up to 16 conditions per place. [2023-01-28 07:53:35,840 INFO L119 LiptonReduction]: Number of co-enabled transitions 12432 [2023-01-28 07:53:38,603 INFO L134 LiptonReduction]: Checked pairs total: 36318 [2023-01-28 07:53:38,603 INFO L136 LiptonReduction]: Total number of compositions: 124 [2023-01-28 07:53:38,607 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:53:38,610 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;@6bea6955, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:53:38,610 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:53:38,612 INFO L130 PetriNetUnfolder]: 1/11 cut-off events. [2023-01-28 07:53:38,612 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:53:38,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:53:38,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:53:38,612 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:53:38,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:53:38,613 INFO L85 PathProgramCache]: Analyzing trace with hash 38919773, now seen corresponding path program 1 times [2023-01-28 07:53:38,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:53:38,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837772782] [2023-01-28 07:53:38,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:38,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:53:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:38,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:53:38,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837772782] [2023-01-28 07:53:38,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837772782] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:53:38,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:53:38,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 07:53:38,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788346400] [2023-01-28 07:53:38,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:53:38,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:53:38,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:53:38,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:53:38,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:53:38,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 298 [2023-01-28 07:53:38,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:38,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:53:38,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 298 [2023-01-28 07:53:38,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:53:41,541 INFO L130 PetriNetUnfolder]: 29246/43217 cut-off events. [2023-01-28 07:53:41,541 INFO L131 PetriNetUnfolder]: For 1215/1215 co-relation queries the response was YES. [2023-01-28 07:53:41,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85165 conditions, 43217 events. 29246/43217 cut-off events. For 1215/1215 co-relation queries the response was YES. Maximal size of possible extension queue 1107. Compared 290555 event pairs, 12184 based on Foata normal form. 8202/48215 useless extension candidates. Maximal degree in co-relation 48397. Up to 39840 conditions per place. [2023-01-28 07:53:41,669 INFO L137 encePairwiseOnDemand]: 273/298 looper letters, 47 selfloop transitions, 4 changer transitions 16/75 dead transitions. [2023-01-28 07:53:41,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 322 flow [2023-01-28 07:53:41,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:53:41,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:53:41,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 484 transitions. [2023-01-28 07:53:41,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5413870246085011 [2023-01-28 07:53:41,671 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 484 transitions. [2023-01-28 07:53:41,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 484 transitions. [2023-01-28 07:53:41,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:53:41,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 484 transitions. [2023-01-28 07:53:41,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:41,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:41,674 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:41,674 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 178 flow. Second operand 3 states and 484 transitions. [2023-01-28 07:53:41,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 322 flow [2023-01-28 07:53:41,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 75 transitions, 322 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:53:41,677 INFO L231 Difference]: Finished difference. Result has 61 places, 46 transitions, 127 flow [2023-01-28 07:53:41,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=61, PETRI_TRANSITIONS=46} [2023-01-28 07:53:41,679 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-01-28 07:53:41,679 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 46 transitions, 127 flow [2023-01-28 07:53:41,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:41,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:53:41,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:53:41,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 07:53:41,679 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:53:41,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:53:41,680 INFO L85 PathProgramCache]: Analyzing trace with hash -690637982, now seen corresponding path program 1 times [2023-01-28 07:53:41,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:53:41,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138058445] [2023-01-28 07:53:41,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:41,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:53:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:41,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:53:41,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138058445] [2023-01-28 07:53:41,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138058445] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:53:41,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440122603] [2023-01-28 07:53:41,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:41,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:53:41,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:53:41,733 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:53:41,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 07:53:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:41,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:53:41,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:53:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:41,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:53:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:41,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440122603] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:53:41,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:53:41,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-01-28 07:53:41,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223806206] [2023-01-28 07:53:41,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:53:41,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 07:53:41,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:53:41,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 07:53:41,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-01-28 07:53:41,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 298 [2023-01-28 07:53:41,856 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 46 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 139.5) internal successors, (837), 6 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:41,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:53:41,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 298 [2023-01-28 07:53:41,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:53:42,417 INFO L130 PetriNetUnfolder]: 5560/8383 cut-off events. [2023-01-28 07:53:42,418 INFO L131 PetriNetUnfolder]: For 1009/1009 co-relation queries the response was YES. [2023-01-28 07:53:42,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17651 conditions, 8383 events. 5560/8383 cut-off events. For 1009/1009 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 49591 event pairs, 0 based on Foata normal form. 0/8383 useless extension candidates. Maximal degree in co-relation 11324. Up to 5346 conditions per place. [2023-01-28 07:53:42,429 INFO L137 encePairwiseOnDemand]: 295/298 looper letters, 0 selfloop transitions, 0 changer transitions 101/101 dead transitions. [2023-01-28 07:53:42,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 101 transitions, 445 flow [2023-01-28 07:53:42,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 07:53:42,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 07:53:42,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 909 transitions. [2023-01-28 07:53:42,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083892617449665 [2023-01-28 07:53:42,432 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 909 transitions. [2023-01-28 07:53:42,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 909 transitions. [2023-01-28 07:53:42,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:53:42,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 909 transitions. [2023-01-28 07:53:42,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 151.5) internal successors, (909), 6 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:42,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 298.0) internal successors, (2086), 7 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:42,437 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 298.0) internal successors, (2086), 7 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:42,437 INFO L175 Difference]: Start difference. First operand has 61 places, 46 transitions, 127 flow. Second operand 6 states and 909 transitions. [2023-01-28 07:53:42,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 101 transitions, 445 flow [2023-01-28 07:53:42,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 101 transitions, 433 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 07:53:42,441 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2023-01-28 07:53:42,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=54, PETRI_TRANSITIONS=0} [2023-01-28 07:53:42,441 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2023-01-28 07:53:42,441 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2023-01-28 07:53:42,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 139.5) internal successors, (837), 6 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:42,442 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:53:42,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-28 07:53:42,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:53:42,646 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:53:42,647 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:53:42,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 174 transitions, 378 flow [2023-01-28 07:53:42,674 INFO L130 PetriNetUnfolder]: 51/352 cut-off events. [2023-01-28 07:53:42,674 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:53:42,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 352 events. 51/352 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1075 event pairs, 1 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 242. Up to 16 conditions per place. [2023-01-28 07:53:42,675 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 174 transitions, 378 flow [2023-01-28 07:53:42,676 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 174 transitions, 378 flow [2023-01-28 07:53:42,676 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:53:42,677 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 174 transitions, 378 flow [2023-01-28 07:53:42,677 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 174 transitions, 378 flow [2023-01-28 07:53:42,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 174 transitions, 378 flow [2023-01-28 07:53:42,700 INFO L130 PetriNetUnfolder]: 51/352 cut-off events. [2023-01-28 07:53:42,700 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:53:42,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 352 events. 51/352 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1075 event pairs, 1 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 242. Up to 16 conditions per place. [2023-01-28 07:53:42,708 INFO L119 LiptonReduction]: Number of co-enabled transitions 12432 [2023-01-28 07:53:45,689 INFO L134 LiptonReduction]: Checked pairs total: 32781 [2023-01-28 07:53:45,689 INFO L136 LiptonReduction]: Total number of compositions: 123 [2023-01-28 07:53:45,690 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:53:45,691 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;@6bea6955, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:53:45,691 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:53:45,696 INFO L130 PetriNetUnfolder]: 24/99 cut-off events. [2023-01-28 07:53:45,696 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-01-28 07:53:45,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:53:45,720 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-28 07:53:45,721 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:53:45,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:53:45,721 INFO L85 PathProgramCache]: Analyzing trace with hash 403868495, now seen corresponding path program 1 times [2023-01-28 07:53:45,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:53:45,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348121492] [2023-01-28 07:53:45,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:45,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:53:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:53:45,733 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:53:45,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:53:45,744 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:53:45,744 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:53:45,744 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:53:45,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 07:53:45,745 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:53:45,745 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:53:45,745 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:53:45,745 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-28 07:53:45,756 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-28 07:53:45,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 204 transitions, 452 flow [2023-01-28 07:53:45,794 INFO L130 PetriNetUnfolder]: 82/534 cut-off events. [2023-01-28 07:53:45,795 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:53:45,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 534 events. 82/534 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1958 event pairs, 6 based on Foata normal form. 0/447 useless extension candidates. Maximal degree in co-relation 372. Up to 32 conditions per place. [2023-01-28 07:53:45,797 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 204 transitions, 452 flow [2023-01-28 07:53:45,799 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 204 transitions, 452 flow [2023-01-28 07:53:45,799 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:53:45,799 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 204 transitions, 452 flow [2023-01-28 07:53:45,800 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 204 transitions, 452 flow [2023-01-28 07:53:45,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 204 transitions, 452 flow [2023-01-28 07:53:45,836 INFO L130 PetriNetUnfolder]: 82/534 cut-off events. [2023-01-28 07:53:45,836 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:53:45,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 534 events. 82/534 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1958 event pairs, 6 based on Foata normal form. 0/447 useless extension candidates. Maximal degree in co-relation 372. Up to 32 conditions per place. [2023-01-28 07:53:45,846 INFO L119 LiptonReduction]: Number of co-enabled transitions 20048 [2023-01-28 07:53:48,160 INFO L134 LiptonReduction]: Checked pairs total: 55487 [2023-01-28 07:53:48,160 INFO L136 LiptonReduction]: Total number of compositions: 141 [2023-01-28 07:53:48,161 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:53:48,161 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;@6bea6955, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:53:48,161 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:53:48,162 INFO L130 PetriNetUnfolder]: 1/10 cut-off events. [2023-01-28 07:53:48,162 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:53:48,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:53:48,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:53:48,162 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:53:48,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:53:48,163 INFO L85 PathProgramCache]: Analyzing trace with hash 54247970, now seen corresponding path program 1 times [2023-01-28 07:53:48,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:53:48,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735193712] [2023-01-28 07:53:48,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:48,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:53:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:48,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:53:48,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735193712] [2023-01-28 07:53:48,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735193712] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:53:48,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:53:48,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 07:53:48,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470813892] [2023-01-28 07:53:48,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:53:48,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:53:48,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:53:48,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:53:48,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:53:48,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 345 [2023-01-28 07:53:48,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 93 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:48,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:53:48,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 345 [2023-01-28 07:53:48,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:54:26,384 INFO L130 PetriNetUnfolder]: 501939/671463 cut-off events. [2023-01-28 07:54:26,385 INFO L131 PetriNetUnfolder]: For 24372/24372 co-relation queries the response was YES. [2023-01-28 07:54:27,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1335972 conditions, 671463 events. 501939/671463 cut-off events. For 24372/24372 co-relation queries the response was YES. Maximal size of possible extension queue 12097. Compared 4850470 event pairs, 241195 based on Foata normal form. 99336/729982 useless extension candidates. Maximal degree in co-relation 576890. Up to 644905 conditions per place. [2023-01-28 07:54:29,092 INFO L137 encePairwiseOnDemand]: 313/345 looper letters, 63 selfloop transitions, 5 changer transitions 17/93 dead transitions. [2023-01-28 07:54:29,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 93 transitions, 417 flow [2023-01-28 07:54:29,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:54:29,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:54:29,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 564 transitions. [2023-01-28 07:54:29,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5449275362318841 [2023-01-28 07:54:29,095 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 564 transitions. [2023-01-28 07:54:29,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 564 transitions. [2023-01-28 07:54:29,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:54:29,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 564 transitions. [2023-01-28 07:54:29,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:54:29,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 345.0) internal successors, (1380), 4 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:54:29,098 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 345.0) internal successors, (1380), 4 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:54:29,098 INFO L175 Difference]: Start difference. First operand has 72 places, 93 transitions, 230 flow. Second operand 3 states and 564 transitions. [2023-01-28 07:54:29,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 93 transitions, 417 flow [2023-01-28 07:54:29,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 93 transitions, 417 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:54:29,123 INFO L231 Difference]: Finished difference. Result has 75 places, 59 transitions, 167 flow [2023-01-28 07:54:29,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=345, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=75, PETRI_TRANSITIONS=59} [2023-01-28 07:54:29,123 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-01-28 07:54:29,123 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 59 transitions, 167 flow [2023-01-28 07:54:29,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:54:29,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:54:29,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:54:29,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-28 07:54:29,124 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:54:29,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:54:29,124 INFO L85 PathProgramCache]: Analyzing trace with hash 295889387, now seen corresponding path program 1 times [2023-01-28 07:54:29,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:54:29,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113157363] [2023-01-28 07:54:29,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:54:29,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:54:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:54:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:54:29,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:54:29,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113157363] [2023-01-28 07:54:29,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113157363] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:54:29,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438922797] [2023-01-28 07:54:29,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:54:29,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:54:29,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:54:29,154 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:54:29,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 07:54:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:54:29,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:54:29,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:54:29,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:54:29,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:54:29,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:54:29,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438922797] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:54:29,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:54:29,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-01-28 07:54:29,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318820665] [2023-01-28 07:54:29,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:54:29,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 07:54:29,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:54:29,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 07:54:29,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-01-28 07:54:29,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 345 [2023-01-28 07:54:29,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 59 transitions, 167 flow. Second operand has 6 states, 6 states have (on average 161.5) internal successors, (969), 6 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:54:29,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:54:29,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 345 [2023-01-28 07:54:29,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:54:36,992 INFO L130 PetriNetUnfolder]: 107481/144070 cut-off events. [2023-01-28 07:54:36,992 INFO L131 PetriNetUnfolder]: For 13373/13373 co-relation queries the response was YES. [2023-01-28 07:54:37,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305508 conditions, 144070 events. 107481/144070 cut-off events. For 13373/13373 co-relation queries the response was YES. Maximal size of possible extension queue 3812. Compared 997777 event pairs, 8613 based on Foata normal form. 0/137981 useless extension candidates. Maximal degree in co-relation 183876. Up to 91786 conditions per place. [2023-01-28 07:54:37,637 INFO L137 encePairwiseOnDemand]: 341/345 looper letters, 120 selfloop transitions, 6 changer transitions 0/143 dead transitions. [2023-01-28 07:54:37,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 143 transitions, 620 flow [2023-01-28 07:54:37,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 07:54:37,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 07:54:37,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1075 transitions. [2023-01-28 07:54:37,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5193236714975845 [2023-01-28 07:54:37,641 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1075 transitions. [2023-01-28 07:54:37,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1075 transitions. [2023-01-28 07:54:37,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:54:37,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1075 transitions. [2023-01-28 07:54:37,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 179.16666666666666) internal successors, (1075), 6 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:54:37,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 345.0) internal successors, (2415), 7 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:54:37,645 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 345.0) internal successors, (2415), 7 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:54:37,645 INFO L175 Difference]: Start difference. First operand has 75 places, 59 transitions, 167 flow. Second operand 6 states and 1075 transitions. [2023-01-28 07:54:37,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 143 transitions, 620 flow [2023-01-28 07:54:37,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 143 transitions, 602 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-01-28 07:54:37,650 INFO L231 Difference]: Finished difference. Result has 76 places, 63 transitions, 198 flow [2023-01-28 07:54:37,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=345, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=76, PETRI_TRANSITIONS=63} [2023-01-28 07:54:37,650 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2023-01-28 07:54:37,650 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 63 transitions, 198 flow [2023-01-28 07:54:37,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.5) internal successors, (969), 6 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:54:37,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:54:37,651 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:54:37,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 07:54:37,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:54:37,856 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:54:37,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:54:37,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1594440125, now seen corresponding path program 1 times [2023-01-28 07:54:37,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:54:37,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498704139] [2023-01-28 07:54:37,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:54:37,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:54:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:54:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:54:37,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:54:37,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498704139] [2023-01-28 07:54:37,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498704139] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:54:37,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812947377] [2023-01-28 07:54:37,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:54:37,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:54:37,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:54:37,946 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:54:37,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 07:54:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:54:38,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 07:54:38,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:54:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:54:38,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:54:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:54:38,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812947377] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:54:38,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:54:38,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-01-28 07:54:38,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571497583] [2023-01-28 07:54:38,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:54:38,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 07:54:38,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:54:38,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 07:54:38,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-01-28 07:54:38,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 345 [2023-01-28 07:54:38,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 63 transitions, 198 flow. Second operand has 12 states, 12 states have (on average 162.0) internal successors, (1944), 12 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:54:38,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:54:38,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 345 [2023-01-28 07:54:38,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:54:42,850 INFO L130 PetriNetUnfolder]: 53669/74508 cut-off events. [2023-01-28 07:54:42,850 INFO L131 PetriNetUnfolder]: For 76527/76527 co-relation queries the response was YES. [2023-01-28 07:54:42,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176257 conditions, 74508 events. 53669/74508 cut-off events. For 76527/76527 co-relation queries the response was YES. Maximal size of possible extension queue 2051. Compared 509425 event pairs, 5640 based on Foata normal form. 5117/79286 useless extension candidates. Maximal degree in co-relation 60594. Up to 46151 conditions per place. [2023-01-28 07:54:43,042 INFO L137 encePairwiseOnDemand]: 342/345 looper letters, 0 selfloop transitions, 0 changer transitions 140/140 dead transitions. [2023-01-28 07:54:43,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 140 transitions, 620 flow [2023-01-28 07:54:43,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 07:54:43,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 07:54:43,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1228 transitions. [2023-01-28 07:54:43,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5084886128364389 [2023-01-28 07:54:43,051 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1228 transitions. [2023-01-28 07:54:43,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1228 transitions. [2023-01-28 07:54:43,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:54:43,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1228 transitions. [2023-01-28 07:54:43,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 175.42857142857142) internal successors, (1228), 7 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:54:43,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 345.0) internal successors, (2760), 8 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:54:43,058 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 345.0) internal successors, (2760), 8 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:54:43,058 INFO L175 Difference]: Start difference. First operand has 76 places, 63 transitions, 198 flow. Second operand 7 states and 1228 transitions. [2023-01-28 07:54:43,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 140 transitions, 620 flow [2023-01-28 07:54:43,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 140 transitions, 611 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 07:54:43,078 INFO L231 Difference]: Finished difference. Result has 75 places, 0 transitions, 0 flow [2023-01-28 07:54:43,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=345, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=75, PETRI_TRANSITIONS=0} [2023-01-28 07:54:43,079 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-01-28 07:54:43,079 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 0 transitions, 0 flow [2023-01-28 07:54:43,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 162.0) internal successors, (1944), 12 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:54:43,080 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:54:43,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 07:54:43,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-28 07:54:43,286 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-28 07:54:43,287 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:54:43,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 204 transitions, 452 flow [2023-01-28 07:54:43,333 INFO L130 PetriNetUnfolder]: 82/534 cut-off events. [2023-01-28 07:54:43,333 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:54:43,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 534 events. 82/534 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1958 event pairs, 6 based on Foata normal form. 0/447 useless extension candidates. Maximal degree in co-relation 372. Up to 32 conditions per place. [2023-01-28 07:54:43,336 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 204 transitions, 452 flow [2023-01-28 07:54:43,338 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 204 transitions, 452 flow [2023-01-28 07:54:43,339 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:54:43,339 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 204 transitions, 452 flow [2023-01-28 07:54:43,339 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 204 transitions, 452 flow [2023-01-28 07:54:43,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 204 transitions, 452 flow [2023-01-28 07:54:43,383 INFO L130 PetriNetUnfolder]: 82/534 cut-off events. [2023-01-28 07:54:43,384 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:54:43,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 534 events. 82/534 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1958 event pairs, 6 based on Foata normal form. 0/447 useless extension candidates. Maximal degree in co-relation 372. Up to 32 conditions per place. [2023-01-28 07:54:43,396 INFO L119 LiptonReduction]: Number of co-enabled transitions 20048 [2023-01-28 07:54:46,546 INFO L134 LiptonReduction]: Checked pairs total: 55487 [2023-01-28 07:54:46,546 INFO L136 LiptonReduction]: Total number of compositions: 139 [2023-01-28 07:54:46,547 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:54:46,547 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;@6bea6955, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:54:46,547 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:54:46,552 INFO L130 PetriNetUnfolder]: 29/128 cut-off events. [2023-01-28 07:54:46,552 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-01-28 07:54:46,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:54:46,553 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-28 07:54:46,553 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:54:46,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:54:46,553 INFO L85 PathProgramCache]: Analyzing trace with hash 302222193, now seen corresponding path program 1 times [2023-01-28 07:54:46,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:54:46,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036539601] [2023-01-28 07:54:46,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:54:46,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:54:46,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:54:46,577 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:54:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:54:46,592 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:54:46,592 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:54:46,592 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:54:46,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-01-28 07:54:46,592 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:54:46,594 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:54:46,594 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:54:46,594 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-28 07:54:46,618 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-01-28 07:54:46,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 234 transitions, 528 flow [2023-01-28 07:54:46,682 INFO L130 PetriNetUnfolder]: 141/848 cut-off events. [2023-01-28 07:54:46,682 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-28 07:54:46,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 848 events. 141/848 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3650 event pairs, 23 based on Foata normal form. 0/717 useless extension candidates. Maximal degree in co-relation 579. Up to 80 conditions per place. [2023-01-28 07:54:46,687 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 234 transitions, 528 flow [2023-01-28 07:54:46,689 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 234 transitions, 528 flow [2023-01-28 07:54:46,689 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:54:46,690 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 204 places, 234 transitions, 528 flow [2023-01-28 07:54:46,690 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 204 places, 234 transitions, 528 flow [2023-01-28 07:54:46,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 234 transitions, 528 flow [2023-01-28 07:54:46,748 INFO L130 PetriNetUnfolder]: 141/848 cut-off events. [2023-01-28 07:54:46,748 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-28 07:54:46,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 848 events. 141/848 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3650 event pairs, 23 based on Foata normal form. 0/717 useless extension candidates. Maximal degree in co-relation 579. Up to 80 conditions per place. [2023-01-28 07:54:46,763 INFO L119 LiptonReduction]: Number of co-enabled transitions 29400 [2023-01-28 07:54:49,534 INFO L134 LiptonReduction]: Checked pairs total: 93718 [2023-01-28 07:54:49,535 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-01-28 07:54:49,536 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:54:49,536 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;@6bea6955, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:54:49,536 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:54:49,537 INFO L130 PetriNetUnfolder]: 3/14 cut-off events. [2023-01-28 07:54:49,537 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:54:49,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:54:49,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:54:49,537 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:54:49,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:54:49,538 INFO L85 PathProgramCache]: Analyzing trace with hash 71425871, now seen corresponding path program 1 times [2023-01-28 07:54:49,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:54:49,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089211889] [2023-01-28 07:54:49,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:54:49,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:54:49,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:54:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:54:49,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:54:49,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089211889] [2023-01-28 07:54:49,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089211889] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:54:49,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:54:49,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 07:54:49,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114804240] [2023-01-28 07:54:49,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:54:49,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:54:49,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:54:49,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:54:49,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:54:49,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 389 [2023-01-28 07:54:49,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 114 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:54:49,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:54:49,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 389 [2023-01-28 07:54:49,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand