/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 BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/stack_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 23:52:07,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 23:52:07,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 23:52:07,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 23:52:07,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 23:52:07,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 23:52:07,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 23:52:07,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 23:52:07,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 23:52:07,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 23:52:07,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 23:52:07,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 23:52:07,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 23:52:07,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 23:52:07,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 23:52:07,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 23:52:07,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 23:52:07,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 23:52:07,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 23:52:07,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 23:52:07,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 23:52:07,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 23:52:07,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 23:52:07,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 23:52:07,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-27 23:52:07,932 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-27 23:52:07,933 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-27 23:52:07,933 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-27 23:52:07,934 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-27 23:52:07,934 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-27 23:52:07,934 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 23:52:07,935 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 23:52:07,936 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 23:52:07,936 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 23:52:07,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 23:52:07,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 23:52:07,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 23:52:07,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 23:52:07,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 23:52:07,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 23:52:07,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 23:52:07,939 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 23:52:07,959 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 23:52:07,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 23:52:07,959 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 23:52:07,960 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 23:52:07,960 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 23:52:07,960 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 23:52:07,960 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 23:52:07,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 23:52:07,961 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 23:52:07,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 23:52:07,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 23:52:07,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 23:52:07,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 23:52:07,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 23:52:07,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 23:52:07,962 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 23:52:07,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 23:52:07,962 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 23:52:07,962 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 23:52:07,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 23:52:07,962 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 23:52:07,962 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 23:52:07,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 23:52:07,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 23:52:07,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 23:52:07,963 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 23:52:07,963 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 23:52:07,963 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 23:52:07,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 23:52:07,963 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 23:52:07,963 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 23:52:07,963 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-27 23:52:08,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 23:52:08,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 23:52:08,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 23:52:08,166 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 23:52:08,166 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 23:52:08,167 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-1.i [2023-01-27 23:52:09,140 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 23:52:09,313 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 23:52:09,314 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i [2023-01-27 23:52:09,324 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/596e48423/01397227951b4f22af6afd29b9fbbe20/FLAG6af34dbfe [2023-01-27 23:52:09,336 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/596e48423/01397227951b4f22af6afd29b9fbbe20 [2023-01-27 23:52:09,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 23:52:09,339 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 23:52:09,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 23:52:09,339 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 23:52:09,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 23:52:09,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:52:09" (1/1) ... [2023-01-27 23:52:09,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1be044f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:52:09, skipping insertion in model container [2023-01-27 23:52:09,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:52:09" (1/1) ... [2023-01-27 23:52:09,359 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 23:52:09,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 23:52:09,662 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i[41530,41543] [2023-01-27 23:52:09,686 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 23:52:09,695 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 23:52:09,733 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i[41530,41543] [2023-01-27 23:52:09,739 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 23:52:09,782 INFO L208 MainTranslator]: Completed translation [2023-01-27 23:52:09,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:52:09 WrapperNode [2023-01-27 23:52:09,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 23:52:09,784 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 23:52:09,785 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 23:52:09,785 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 23:52:09,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:52:09" (1/1) ... [2023-01-27 23:52:09,815 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:52:09" (1/1) ... [2023-01-27 23:52:09,832 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 156 [2023-01-27 23:52:09,832 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 23:52:09,833 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 23:52:09,833 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 23:52:09,833 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 23:52:09,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:52:09" (1/1) ... [2023-01-27 23:52:09,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:52:09" (1/1) ... [2023-01-27 23:52:09,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:52:09" (1/1) ... [2023-01-27 23:52:09,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:52:09" (1/1) ... [2023-01-27 23:52:09,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:52:09" (1/1) ... [2023-01-27 23:52:09,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:52:09" (1/1) ... [2023-01-27 23:52:09,852 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:52:09" (1/1) ... [2023-01-27 23:52:09,852 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:52:09" (1/1) ... [2023-01-27 23:52:09,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 23:52:09,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 23:52:09,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 23:52:09,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 23:52:09,855 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:52:09" (1/1) ... [2023-01-27 23:52:09,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 23:52:09,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:52:09,877 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-27 23:52:09,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-27 23:52:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-01-27 23:52:09,915 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-01-27 23:52:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-01-27 23:52:09,915 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-01-27 23:52:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 23:52:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 23:52:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 23:52:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 23:52:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 23:52:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 23:52:09,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 23:52:09,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 23:52:09,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 23:52:09,917 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 23:52:10,088 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 23:52:10,089 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 23:52:10,279 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 23:52:10,285 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 23:52:10,285 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-27 23:52:10,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:52:10 BoogieIcfgContainer [2023-01-27 23:52:10,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 23:52:10,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 23:52:10,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 23:52:10,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 23:52:10,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 11:52:09" (1/3) ... [2023-01-27 23:52:10,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ce863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:52:10, skipping insertion in model container [2023-01-27 23:52:10,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:52:09" (2/3) ... [2023-01-27 23:52:10,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ce863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:52:10, skipping insertion in model container [2023-01-27 23:52:10,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:52:10" (3/3) ... [2023-01-27 23:52:10,292 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2023-01-27 23:52:10,312 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 23:52:10,312 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-01-27 23:52:10,312 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 23:52:10,370 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 23:52:10,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 158 transitions, 332 flow [2023-01-27 23:52:10,434 INFO L130 PetriNetUnfolder]: 10/156 cut-off events. [2023-01-27 23:52:10,434 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 23:52:10,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 156 events. 10/156 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 386 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2023-01-27 23:52:10,442 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 158 transitions, 332 flow [2023-01-27 23:52:10,445 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 147 transitions, 303 flow [2023-01-27 23:52:10,447 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 23:52:10,453 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 147 transitions, 303 flow [2023-01-27 23:52:10,454 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 147 transitions, 303 flow [2023-01-27 23:52:10,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 147 transitions, 303 flow [2023-01-27 23:52:10,473 INFO L130 PetriNetUnfolder]: 10/147 cut-off events. [2023-01-27 23:52:10,473 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 23:52:10,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 147 events. 10/147 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 316 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2023-01-27 23:52:10,477 INFO L119 LiptonReduction]: Number of co-enabled transitions 7334 [2023-01-27 23:52:13,287 INFO L134 LiptonReduction]: Checked pairs total: 9508 [2023-01-27 23:52:13,287 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-01-27 23:52:13,296 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 23:52:13,316 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;@1159f59b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 23:52:13,317 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-27 23:52:13,320 INFO L130 PetriNetUnfolder]: 0/14 cut-off events. [2023-01-27 23:52:13,320 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 23:52:13,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:52:13,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 23:52:13,321 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:52:13,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:52:13,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1714417513, now seen corresponding path program 1 times [2023-01-27 23:52:13,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:52:13,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473816668] [2023-01-27 23:52:13,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:52:13,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:52:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:52:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:52:13,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:52:13,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473816668] [2023-01-27 23:52:13,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473816668] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:52:13,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:52:13,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 23:52:13,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539428219] [2023-01-27 23:52:13,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:52:13,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 23:52:13,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:52:13,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 23:52:13,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 23:52:13,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 294 [2023-01-27 23:52:13,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:13,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:52:13,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 294 [2023-01-27 23:52:13,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:52:13,744 INFO L130 PetriNetUnfolder]: 845/1378 cut-off events. [2023-01-27 23:52:13,744 INFO L131 PetriNetUnfolder]: For 58/58 co-relation queries the response was YES. [2023-01-27 23:52:13,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2794 conditions, 1378 events. 845/1378 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5796 event pairs, 243 based on Foata normal form. 0/1124 useless extension candidates. Maximal degree in co-relation 2588. Up to 777 conditions per place. [2023-01-27 23:52:13,753 INFO L137 encePairwiseOnDemand]: 289/294 looper letters, 55 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-01-27 23:52:13,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 60 transitions, 253 flow [2023-01-27 23:52:13,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 23:52:13,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 23:52:13,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-01-27 23:52:13,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340136054421769 [2023-01-27 23:52:13,766 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-01-27 23:52:13,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-01-27 23:52:13,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:52:13,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-01-27 23:52:13,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:13,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:13,776 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:13,777 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 75 flow. Second operand 3 states and 471 transitions. [2023-01-27 23:52:13,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 60 transitions, 253 flow [2023-01-27 23:52:13,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 60 transitions, 245 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-27 23:52:13,781 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 100 flow [2023-01-27 23:52:13,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2023-01-27 23:52:13,784 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2023-01-27 23:52:13,784 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 100 flow [2023-01-27 23:52:13,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:13,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:52:13,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:52:13,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 23:52:13,785 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:52:13,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:52:13,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1177704333, now seen corresponding path program 1 times [2023-01-27 23:52:13,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:52:13,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343553395] [2023-01-27 23:52:13,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:52:13,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:52:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:52:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:52:13,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:52:13,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343553395] [2023-01-27 23:52:13,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343553395] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:52:13,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:52:13,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 23:52:13,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391668890] [2023-01-27 23:52:13,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:52:13,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 23:52:13,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:52:13,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 23:52:13,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 23:52:13,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 294 [2023-01-27 23:52:13,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:13,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:52:13,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 294 [2023-01-27 23:52:13,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:52:13,969 INFO L130 PetriNetUnfolder]: 897/1478 cut-off events. [2023-01-27 23:52:13,969 INFO L131 PetriNetUnfolder]: For 191/191 co-relation queries the response was YES. [2023-01-27 23:52:13,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3207 conditions, 1478 events. 897/1478 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 6180 event pairs, 398 based on Foata normal form. 0/1224 useless extension candidates. Maximal degree in co-relation 2810. Up to 1184 conditions per place. [2023-01-27 23:52:13,974 INFO L137 encePairwiseOnDemand]: 291/294 looper letters, 48 selfloop transitions, 2 changer transitions 3/54 dead transitions. [2023-01-27 23:52:13,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 54 transitions, 249 flow [2023-01-27 23:52:13,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 23:52:13,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 23:52:13,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2023-01-27 23:52:13,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2023-01-27 23:52:13,977 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2023-01-27 23:52:13,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2023-01-27 23:52:13,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:52:13,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2023-01-27 23:52:13,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:13,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:13,981 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:13,981 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 100 flow. Second operand 3 states and 480 transitions. [2023-01-27 23:52:13,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 54 transitions, 249 flow [2023-01-27 23:52:13,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 54 transitions, 239 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 23:52:13,983 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 104 flow [2023-01-27 23:52:13,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-01-27 23:52:13,983 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-01-27 23:52:13,983 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 104 flow [2023-01-27 23:52:13,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:13,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:52:13,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:52:13,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 23:52:13,984 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:52:13,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:52:13,985 INFO L85 PathProgramCache]: Analyzing trace with hash -613507711, now seen corresponding path program 1 times [2023-01-27 23:52:13,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:52:13,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009919633] [2023-01-27 23:52:13,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:52:13,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:52:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:52:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:52:14,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:52:14,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009919633] [2023-01-27 23:52:14,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009919633] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:52:14,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:52:14,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 23:52:14,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476589822] [2023-01-27 23:52:14,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:52:14,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 23:52:14,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:52:14,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 23:52:14,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 23:52:14,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 294 [2023-01-27 23:52:14,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:14,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:52:14,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 294 [2023-01-27 23:52:14,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:52:14,215 INFO L130 PetriNetUnfolder]: 861/1442 cut-off events. [2023-01-27 23:52:14,216 INFO L131 PetriNetUnfolder]: For 135/135 co-relation queries the response was YES. [2023-01-27 23:52:14,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3180 conditions, 1442 events. 861/1442 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 6182 event pairs, 584 based on Foata normal form. 50/1334 useless extension candidates. Maximal degree in co-relation 2808. Up to 1258 conditions per place. [2023-01-27 23:52:14,222 INFO L137 encePairwiseOnDemand]: 291/294 looper letters, 50 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2023-01-27 23:52:14,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 56 transitions, 264 flow [2023-01-27 23:52:14,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 23:52:14,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 23:52:14,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2023-01-27 23:52:14,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5351473922902494 [2023-01-27 23:52:14,224 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2023-01-27 23:52:14,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2023-01-27 23:52:14,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:52:14,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2023-01-27 23:52:14,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:14,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:14,228 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:14,228 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 104 flow. Second operand 3 states and 472 transitions. [2023-01-27 23:52:14,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 56 transitions, 264 flow [2023-01-27 23:52:14,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 23:52:14,230 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 122 flow [2023-01-27 23:52:14,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-01-27 23:52:14,231 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 4 predicate places. [2023-01-27 23:52:14,231 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 122 flow [2023-01-27 23:52:14,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:14,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:52:14,231 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:52:14,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 23:52:14,232 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:52:14,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:52:14,232 INFO L85 PathProgramCache]: Analyzing trace with hash 558175028, now seen corresponding path program 1 times [2023-01-27 23:52:14,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:52:14,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826319240] [2023-01-27 23:52:14,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:52:14,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:52:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:52:14,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:52:14,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:52:14,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826319240] [2023-01-27 23:52:14,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826319240] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:52:14,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489131665] [2023-01-27 23:52:14,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:52:14,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:52:14,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:52:14,343 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) [2023-01-27 23:52:14,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 23:52:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:52:14,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-27 23:52:14,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:52:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:52:14,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:52:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:52:14,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489131665] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:52:14,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:52:14,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-01-27 23:52:14,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806195484] [2023-01-27 23:52:14,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:52:14,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 23:52:14,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:52:14,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 23:52:14,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-01-27 23:52:14,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 294 [2023-01-27 23:52:14,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 122 flow. Second operand has 8 states, 8 states have (on average 138.375) internal successors, (1107), 8 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:14,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:52:14,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 294 [2023-01-27 23:52:14,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:52:14,893 INFO L130 PetriNetUnfolder]: 1815/3000 cut-off events. [2023-01-27 23:52:14,893 INFO L131 PetriNetUnfolder]: For 1081/1081 co-relation queries the response was YES. [2023-01-27 23:52:14,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7073 conditions, 3000 events. 1815/3000 cut-off events. For 1081/1081 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 14159 event pairs, 349 based on Foata normal form. 48/2736 useless extension candidates. Maximal degree in co-relation 6486. Up to 844 conditions per place. [2023-01-27 23:52:14,906 INFO L137 encePairwiseOnDemand]: 288/294 looper letters, 164 selfloop transitions, 22 changer transitions 0/187 dead transitions. [2023-01-27 23:52:14,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 187 transitions, 900 flow [2023-01-27 23:52:14,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 23:52:14,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 23:52:14,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1535 transitions. [2023-01-27 23:52:14,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5221088435374149 [2023-01-27 23:52:14,913 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1535 transitions. [2023-01-27 23:52:14,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1535 transitions. [2023-01-27 23:52:14,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:52:14,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1535 transitions. [2023-01-27 23:52:14,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 153.5) internal successors, (1535), 10 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:14,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 294.0) internal successors, (3234), 11 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:14,921 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 294.0) internal successors, (3234), 11 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:14,921 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 122 flow. Second operand 10 states and 1535 transitions. [2023-01-27 23:52:14,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 187 transitions, 900 flow [2023-01-27 23:52:14,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 187 transitions, 887 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 23:52:14,929 INFO L231 Difference]: Finished difference. Result has 51 places, 56 transitions, 280 flow [2023-01-27 23:52:14,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=280, PETRI_PLACES=51, PETRI_TRANSITIONS=56} [2023-01-27 23:52:14,930 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2023-01-27 23:52:14,930 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 56 transitions, 280 flow [2023-01-27 23:52:14,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 138.375) internal successors, (1107), 8 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:14,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:52:14,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:52:14,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-27 23:52:15,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:52:15,137 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:52:15,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:52:15,138 INFO L85 PathProgramCache]: Analyzing trace with hash -957332165, now seen corresponding path program 1 times [2023-01-27 23:52:15,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:52:15,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563898151] [2023-01-27 23:52:15,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:52:15,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:52:15,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:52:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:52:15,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:52:15,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563898151] [2023-01-27 23:52:15,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563898151] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:52:15,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:52:15,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 23:52:15,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908433057] [2023-01-27 23:52:15,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:52:15,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 23:52:15,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:52:15,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 23:52:15,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 23:52:15,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 294 [2023-01-27 23:52:15,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 56 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:15,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:52:15,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 294 [2023-01-27 23:52:15,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:52:15,305 INFO L130 PetriNetUnfolder]: 573/1102 cut-off events. [2023-01-27 23:52:15,305 INFO L131 PetriNetUnfolder]: For 410/410 co-relation queries the response was YES. [2023-01-27 23:52:15,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2672 conditions, 1102 events. 573/1102 cut-off events. For 410/410 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4907 event pairs, 98 based on Foata normal form. 0/1022 useless extension candidates. Maximal degree in co-relation 1698. Up to 785 conditions per place. [2023-01-27 23:52:15,308 INFO L137 encePairwiseOnDemand]: 289/294 looper letters, 46 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2023-01-27 23:52:15,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 329 flow [2023-01-27 23:52:15,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 23:52:15,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 23:52:15,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-01-27 23:52:15,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2023-01-27 23:52:15,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-01-27 23:52:15,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-01-27 23:52:15,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:52:15,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-01-27 23:52:15,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:15,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:15,312 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:15,312 INFO L175 Difference]: Start difference. First operand has 51 places, 56 transitions, 280 flow. Second operand 3 states and 450 transitions. [2023-01-27 23:52:15,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 329 flow [2023-01-27 23:52:15,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 317 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-01-27 23:52:15,315 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 204 flow [2023-01-27 23:52:15,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-01-27 23:52:15,315 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2023-01-27 23:52:15,315 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 204 flow [2023-01-27 23:52:15,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:15,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:52:15,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:52:15,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 23:52:15,316 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:52:15,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:52:15,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1417362489, now seen corresponding path program 1 times [2023-01-27 23:52:15,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:52:15,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753381263] [2023-01-27 23:52:15,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:52:15,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:52:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:52:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:52:15,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:52:15,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753381263] [2023-01-27 23:52:15,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753381263] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:52:15,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:52:15,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 23:52:15,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022808575] [2023-01-27 23:52:15,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:52:15,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 23:52:15,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:52:15,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 23:52:15,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 23:52:15,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 294 [2023-01-27 23:52:15,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 138.6) internal successors, (693), 5 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:15,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:52:15,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 294 [2023-01-27 23:52:15,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:52:15,537 INFO L130 PetriNetUnfolder]: 679/1270 cut-off events. [2023-01-27 23:52:15,537 INFO L131 PetriNetUnfolder]: For 397/397 co-relation queries the response was YES. [2023-01-27 23:52:15,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3196 conditions, 1270 events. 679/1270 cut-off events. For 397/397 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5464 event pairs, 209 based on Foata normal form. 18/1288 useless extension candidates. Maximal degree in co-relation 2552. Up to 666 conditions per place. [2023-01-27 23:52:15,541 INFO L137 encePairwiseOnDemand]: 288/294 looper letters, 78 selfloop transitions, 14 changer transitions 0/93 dead transitions. [2023-01-27 23:52:15,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 93 transitions, 524 flow [2023-01-27 23:52:15,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 23:52:15,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 23:52:15,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 896 transitions. [2023-01-27 23:52:15,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2023-01-27 23:52:15,544 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 896 transitions. [2023-01-27 23:52:15,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 896 transitions. [2023-01-27 23:52:15,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:52:15,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 896 transitions. [2023-01-27 23:52:15,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.33333333333334) internal successors, (896), 6 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:15,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 294.0) internal successors, (2058), 7 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:15,547 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 294.0) internal successors, (2058), 7 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:15,548 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 204 flow. Second operand 6 states and 896 transitions. [2023-01-27 23:52:15,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 93 transitions, 524 flow [2023-01-27 23:52:15,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 93 transitions, 511 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 23:52:15,551 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 271 flow [2023-01-27 23:52:15,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=271, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-01-27 23:52:15,553 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 21 predicate places. [2023-01-27 23:52:15,553 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 271 flow [2023-01-27 23:52:15,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.6) internal successors, (693), 5 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:15,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:52:15,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:52:15,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 23:52:15,557 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:52:15,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:52:15,557 INFO L85 PathProgramCache]: Analyzing trace with hash 256939556, now seen corresponding path program 1 times [2023-01-27 23:52:15,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:52:15,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588294783] [2023-01-27 23:52:15,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:52:15,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:52:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:52:16,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:52:16,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:52:16,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588294783] [2023-01-27 23:52:16,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588294783] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:52:16,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:52:16,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-27 23:52:16,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072392818] [2023-01-27 23:52:16,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:52:16,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-27 23:52:16,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:52:16,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-27 23:52:16,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-01-27 23:52:16,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 294 [2023-01-27 23:52:16,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 271 flow. Second operand has 10 states, 10 states have (on average 110.1) internal successors, (1101), 10 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:16,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:52:16,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 294 [2023-01-27 23:52:16,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:52:16,494 INFO L130 PetriNetUnfolder]: 975/1854 cut-off events. [2023-01-27 23:52:16,494 INFO L131 PetriNetUnfolder]: For 1249/1249 co-relation queries the response was YES. [2023-01-27 23:52:16,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4720 conditions, 1854 events. 975/1854 cut-off events. For 1249/1249 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 9331 event pairs, 295 based on Foata normal form. 0/1832 useless extension candidates. Maximal degree in co-relation 3621. Up to 1030 conditions per place. [2023-01-27 23:52:16,500 INFO L137 encePairwiseOnDemand]: 285/294 looper letters, 106 selfloop transitions, 10 changer transitions 3/124 dead transitions. [2023-01-27 23:52:16,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 124 transitions, 771 flow [2023-01-27 23:52:16,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 23:52:16,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 23:52:16,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 967 transitions. [2023-01-27 23:52:16,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111394557823129 [2023-01-27 23:52:16,503 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 967 transitions. [2023-01-27 23:52:16,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 967 transitions. [2023-01-27 23:52:16,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:52:16,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 967 transitions. [2023-01-27 23:52:16,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.875) internal successors, (967), 8 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:16,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:16,507 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:16,507 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 271 flow. Second operand 8 states and 967 transitions. [2023-01-27 23:52:16,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 124 transitions, 771 flow [2023-01-27 23:52:16,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 124 transitions, 748 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-01-27 23:52:16,511 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 327 flow [2023-01-27 23:52:16,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=327, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2023-01-27 23:52:16,512 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 31 predicate places. [2023-01-27 23:52:16,512 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 327 flow [2023-01-27 23:52:16,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 110.1) internal successors, (1101), 10 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:16,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:52:16,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:52:16,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 23:52:16,512 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:52:16,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:52:16,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1974860314, now seen corresponding path program 2 times [2023-01-27 23:52:16,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:52:16,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066609059] [2023-01-27 23:52:16,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:52:16,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:52:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:52:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:52:16,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:52:16,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066609059] [2023-01-27 23:52:16,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066609059] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:52:16,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:52:16,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-27 23:52:16,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403608789] [2023-01-27 23:52:16,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:52:16,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-27 23:52:16,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:52:16,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-27 23:52:16,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-01-27 23:52:16,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 294 [2023-01-27 23:52:16,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 327 flow. Second operand has 10 states, 10 states have (on average 110.1) internal successors, (1101), 10 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:16,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:52:16,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 294 [2023-01-27 23:52:16,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:52:17,433 INFO L130 PetriNetUnfolder]: 1273/2412 cut-off events. [2023-01-27 23:52:17,434 INFO L131 PetriNetUnfolder]: For 1456/1456 co-relation queries the response was YES. [2023-01-27 23:52:17,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6462 conditions, 2412 events. 1273/2412 cut-off events. For 1456/1456 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 12235 event pairs, 356 based on Foata normal form. 0/2383 useless extension candidates. Maximal degree in co-relation 4242. Up to 965 conditions per place. [2023-01-27 23:52:17,443 INFO L137 encePairwiseOnDemand]: 286/294 looper letters, 106 selfloop transitions, 14 changer transitions 3/128 dead transitions. [2023-01-27 23:52:17,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 128 transitions, 843 flow [2023-01-27 23:52:17,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 23:52:17,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 23:52:17,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 967 transitions. [2023-01-27 23:52:17,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111394557823129 [2023-01-27 23:52:17,446 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 967 transitions. [2023-01-27 23:52:17,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 967 transitions. [2023-01-27 23:52:17,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:52:17,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 967 transitions. [2023-01-27 23:52:17,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.875) internal successors, (967), 8 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:17,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:17,450 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:17,450 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 327 flow. Second operand 8 states and 967 transitions. [2023-01-27 23:52:17,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 128 transitions, 843 flow [2023-01-27 23:52:17,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 128 transitions, 843 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 23:52:17,455 INFO L231 Difference]: Finished difference. Result has 76 places, 62 transitions, 405 flow [2023-01-27 23:52:17,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=405, PETRI_PLACES=76, PETRI_TRANSITIONS=62} [2023-01-27 23:52:17,456 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 41 predicate places. [2023-01-27 23:52:17,456 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 62 transitions, 405 flow [2023-01-27 23:52:17,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 110.1) internal successors, (1101), 10 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:17,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:52:17,457 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:52:17,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 23:52:17,457 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:52:17,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:52:17,457 INFO L85 PathProgramCache]: Analyzing trace with hash 834917319, now seen corresponding path program 1 times [2023-01-27 23:52:17,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:52:17,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607813350] [2023-01-27 23:52:17,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:52:17,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:52:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:52:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 23:52:17,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:52:17,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607813350] [2023-01-27 23:52:17,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607813350] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:52:17,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:52:17,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 23:52:17,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389135668] [2023-01-27 23:52:17,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:52:17,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 23:52:17,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:52:17,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 23:52:17,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-27 23:52:17,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 294 [2023-01-27 23:52:17,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 62 transitions, 405 flow. Second operand has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:17,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:52:17,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 294 [2023-01-27 23:52:17,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:52:17,747 INFO L130 PetriNetUnfolder]: 1345/2519 cut-off events. [2023-01-27 23:52:17,747 INFO L131 PetriNetUnfolder]: For 1788/1788 co-relation queries the response was YES. [2023-01-27 23:52:17,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7088 conditions, 2519 events. 1345/2519 cut-off events. For 1788/1788 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 12306 event pairs, 540 based on Foata normal form. 16/2505 useless extension candidates. Maximal degree in co-relation 5066. Up to 992 conditions per place. [2023-01-27 23:52:17,757 INFO L137 encePairwiseOnDemand]: 287/294 looper letters, 108 selfloop transitions, 15 changer transitions 0/124 dead transitions. [2023-01-27 23:52:17,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 124 transitions, 897 flow [2023-01-27 23:52:17,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 23:52:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 23:52:17,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1026 transitions. [2023-01-27 23:52:17,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49854227405247814 [2023-01-27 23:52:17,760 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1026 transitions. [2023-01-27 23:52:17,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1026 transitions. [2023-01-27 23:52:17,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:52:17,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1026 transitions. [2023-01-27 23:52:17,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 146.57142857142858) internal successors, (1026), 7 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:17,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:17,764 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:17,764 INFO L175 Difference]: Start difference. First operand has 76 places, 62 transitions, 405 flow. Second operand 7 states and 1026 transitions. [2023-01-27 23:52:17,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 124 transitions, 897 flow [2023-01-27 23:52:17,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 124 transitions, 873 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-01-27 23:52:17,771 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 515 flow [2023-01-27 23:52:17,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=515, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2023-01-27 23:52:17,771 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 46 predicate places. [2023-01-27 23:52:17,771 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 515 flow [2023-01-27 23:52:17,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:52:17,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:52:17,772 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:52:17,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 23:52:17,772 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:52:17,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:52:17,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1564096500, now seen corresponding path program 1 times [2023-01-27 23:52:17,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:52:17,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556325410] [2023-01-27 23:52:17,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:52:17,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:52:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 23:52:17,792 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 23:52:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 23:52:17,821 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 23:52:17,821 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 23:52:17,821 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-01-27 23:52:17,822 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-01-27 23:52:17,823 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-01-27 23:52:17,823 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-27 23:52:17,823 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-27 23:52:17,823 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-27 23:52:17,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-27 23:52:17,823 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:52:17,826 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 23:52:17,826 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 23:52:17,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 11:52:17 BasicIcfg [2023-01-27 23:52:17,855 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 23:52:17,855 INFO L158 Benchmark]: Toolchain (without parser) took 8516.64ms. Allocated memory was 627.0MB in the beginning and 752.9MB in the end (delta: 125.8MB). Free memory was 580.9MB in the beginning and 292.2MB in the end (delta: 288.7MB). Peak memory consumption was 417.7MB. Max. memory is 16.0GB. [2023-01-27 23:52:17,855 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 360.7MB. Free memory is still 304.9MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 23:52:17,856 INFO L158 Benchmark]: CACSL2BoogieTranslator took 444.49ms. Allocated memory is still 627.0MB. Free memory was 580.5MB in the beginning and 551.7MB in the end (delta: 28.9MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-01-27 23:52:17,856 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.75ms. Allocated memory is still 627.0MB. Free memory was 551.7MB in the beginning and 549.1MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-01-27 23:52:17,856 INFO L158 Benchmark]: Boogie Preprocessor took 21.83ms. Allocated memory is still 627.0MB. Free memory was 548.8MB in the beginning and 547.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 23:52:17,856 INFO L158 Benchmark]: RCFGBuilder took 431.70ms. Allocated memory is still 627.0MB. Free memory was 547.0MB in the beginning and 528.4MB in the end (delta: 18.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-01-27 23:52:17,856 INFO L158 Benchmark]: TraceAbstraction took 7567.16ms. Allocated memory was 627.0MB in the beginning and 752.9MB in the end (delta: 125.8MB). Free memory was 527.8MB in the beginning and 292.2MB in the end (delta: 235.6MB). Peak memory consumption was 363.1MB. Max. memory is 16.0GB. [2023-01-27 23:52:17,857 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 360.7MB. Free memory is still 304.9MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 444.49ms. Allocated memory is still 627.0MB. Free memory was 580.5MB in the beginning and 551.7MB in the end (delta: 28.9MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 47.75ms. Allocated memory is still 627.0MB. Free memory was 551.7MB in the beginning and 549.1MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 21.83ms. Allocated memory is still 627.0MB. Free memory was 548.8MB in the beginning and 547.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 431.70ms. Allocated memory is still 627.0MB. Free memory was 547.0MB in the beginning and 528.4MB in the end (delta: 18.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 7567.16ms. Allocated memory was 627.0MB in the beginning and 752.9MB in the end (delta: 125.8MB). Free memory was 527.8MB in the beginning and 292.2MB in the end (delta: 235.6MB). Peak memory consumption was 363.1MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8s, 144 PlacesBefore, 35 PlacesAfterwards, 147 TransitionsBefore, 33 TransitionsAfterwards, 7334 CoEnabledTransitionPairs, 6 FixpointIterations, 26 TrivialSequentialCompositions, 86 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 19 ConcurrentYvCompositions, 5 ChoiceCompositions, 136 TotalNumberOfCompositions, 9508 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7052, independent: 6870, independent conditional: 0, independent unconditional: 6870, dependent: 182, dependent conditional: 0, dependent unconditional: 182, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4045, independent: 3996, independent conditional: 0, independent unconditional: 3996, dependent: 49, dependent conditional: 0, dependent unconditional: 49, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7052, independent: 2874, independent conditional: 0, independent unconditional: 2874, dependent: 133, dependent conditional: 0, dependent unconditional: 133, unknown: 4045, unknown conditional: 0, unknown unconditional: 4045] , Statistics on independence cache: Total cache size (in pairs): 167, Positive cache size: 151, Positive conditional cache size: 0, Positive unconditional cache size: 151, Negative cache size: 16, Negative conditional cache size: 0, Negative unconditional cache size: 16, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 941]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(800)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1020] 0 pthread_t id1, id2; [L1022] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=9, top=0] [L989] 1 int i; [L990] 1 unsigned int tmp; [L991] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1023] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=10, top=0] [L991] COND TRUE 1 i<(800) [L994] 1 tmp = __VERIFIER_nondet_uint() [L995] CALL 1 assume_abort_if_not(tmp < (800)) [L1005] 2 int i; [L1006] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L23] COND FALSE 1 !(!cond) [L995] RET 1 assume_abort_if_not(tmp < (800)) [L996] CALL, EXPR 1 push(arr,tmp) [L961] COND FALSE 1 !(top==(800)) [L968] CALL, EXPR 1 get_top() [L953] 1 return top; [L968] RET, EXPR 1 get_top() [L968] 1 stack[get_top()] = x [L969] CALL 1 inc_top() [L945] 1 top++ [L969] RET 1 inc_top() [L971] 1 return 0; [L996] RET, EXPR 1 push(arr,tmp) [L996] COND FALSE 1 !(push(arr,tmp)==(-1)) [L998] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=799, top=1] [L991] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=799, top=1] [L1006] COND TRUE 2 i<(800) [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; [L975] RET, EXPR 2 get_top() [L975] COND FALSE 2 !(get_top()==0) [L982] CALL 2 dec_top() [L949] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L982] RET 2 dec_top() [L983] CALL, EXPR 2 get_top() [L953] 2 return top; [L983] RET, EXPR 2 get_top() [L983] EXPR 2 stack[get_top()] [L983] 2 return stack[get_top()]; [L1011] RET, EXPR 2 pop(arr) [L1011] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1006] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1006] COND TRUE 2 i<(800) [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; [L975] RET, EXPR 2 get_top() [L975] COND TRUE 2 get_top()==0 [L978] 2 return (-2); [L1011] RET, EXPR 2 pop(arr) [L1011] COND TRUE 2 !(pop(arr)!=(-2)) [L1012] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 250 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7.4s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 472 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 472 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1668 IncrementalHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 0 mSDtfsCounter, 1668 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=515occurred in iteration=9, InterpolantAutomatonStates: 51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 183 NumberOfCodeBlocks, 183 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 160 ConstructedInterpolants, 0 QuantifiedInterpolants, 1568 SizeOfPredicates, 1 NumberOfNonLiveVariables, 188 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 11 InterpolantComputations, 8 PerfectInterpolantSequences, 6/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-01-27 23:52:17,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...