/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 07:54:56,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 07:54:56,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 07:54:56,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 07:54:56,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 07:54:56,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 07:54:56,923 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 07:54:56,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 07:54:56,928 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 07:54:56,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 07:54:56,933 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 07:54:56,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 07:54:56,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 07:54:56,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 07:54:56,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 07:54:56,937 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 07:54:56,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 07:54:56,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 07:54:56,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 07:54:56,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 07:54:56,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 07:54:56,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 07:54:56,943 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 07:54:56,944 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 07:54:56,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 07:54:56,951 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 07:54:56,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 07:54:56,952 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 07:54:56,952 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 07:54:56,953 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 07:54:56,953 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 07:54:56,953 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 07:54:56,954 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 07:54:56,954 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 07:54:56,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 07:54:56,955 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 07:54:56,955 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 07:54:56,955 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 07:54:56,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 07:54:56,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 07:54:56,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 07:54:56,960 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 07:54:56,984 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 07:54:56,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 07:54:56,985 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 07:54:56,985 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 07:54:56,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 07:54:56,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 07:54:56,986 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 07:54:56,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 07:54:56,986 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 07:54:56,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 07:54:56,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 07:54:56,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 07:54:56,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 07:54:56,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 07:54:56,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 07:54:56,986 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 07:54:56,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 07:54:56,987 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 07:54:56,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 07:54:56,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 07:54:56,987 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 07:54:56,987 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 07:54:56,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 07:54:56,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:54:56,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 07:54:56,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 07:54:56,987 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 07:54:56,987 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 07:54:56,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 07:54:56,987 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 07:54:56,988 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 07:54:56,988 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 07:54:57,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 07:54:57,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 07:54:57,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 07:54:57,183 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 07:54:57,183 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 07:54:57,184 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-01-28 07:54:58,179 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 07:54:58,386 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 07:54:58,386 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-01-28 07:54:58,401 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9f06b209/83c4bd5ba50748a98b271bd5b751b08a/FLAGe78c9dc98 [2023-01-28 07:54:58,410 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9f06b209/83c4bd5ba50748a98b271bd5b751b08a [2023-01-28 07:54:58,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 07:54:58,414 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 07:54:58,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 07:54:58,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 07:54:58,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 07:54:58,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:54:58" (1/1) ... [2023-01-28 07:54:58,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c20e9e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:58, skipping insertion in model container [2023-01-28 07:54:58,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:54:58" (1/1) ... [2023-01-28 07:54:58,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 07:54:58,457 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 07:54:58,628 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i[30176,30189] [2023-01-28 07:54:58,653 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:54:58,664 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 07:54:58,698 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i[30176,30189] [2023-01-28 07:54:58,704 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:54:58,729 INFO L208 MainTranslator]: Completed translation [2023-01-28 07:54:58,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:58 WrapperNode [2023-01-28 07:54:58,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 07:54:58,730 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 07:54:58,730 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 07:54:58,730 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 07:54:58,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:58" (1/1) ... [2023-01-28 07:54:58,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:58" (1/1) ... [2023-01-28 07:54:58,756 INFO L138 Inliner]: procedures = 171, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2023-01-28 07:54:58,757 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 07:54:58,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 07:54:58,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 07:54:58,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 07:54:58,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:58" (1/1) ... [2023-01-28 07:54:58,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:58" (1/1) ... [2023-01-28 07:54:58,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:58" (1/1) ... [2023-01-28 07:54:58,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:58" (1/1) ... [2023-01-28 07:54:58,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:58" (1/1) ... [2023-01-28 07:54:58,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:58" (1/1) ... [2023-01-28 07:54:58,772 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:58" (1/1) ... [2023-01-28 07:54:58,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:58" (1/1) ... [2023-01-28 07:54:58,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 07:54:58,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 07:54:58,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 07:54:58,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 07:54:58,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:58" (1/1) ... [2023-01-28 07:54:58,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:54:58,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:54:58,795 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-28 07:54:58,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 07:54:58,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 07:54:58,820 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 07:54:58,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 07:54:58,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 07:54:58,821 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-28 07:54:58,821 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-28 07:54:58,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 07:54:58,821 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-01-28 07:54:58,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 07:54:58,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 07:54:58,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 07:54:58,822 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 07:54:58,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 07:54:58,918 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 07:54:58,920 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 07:54:59,060 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 07:54:59,065 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 07:54:59,065 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-01-28 07:54:59,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:54:59 BoogieIcfgContainer [2023-01-28 07:54:59,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 07:54:59,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 07:54:59,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 07:54:59,071 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 07:54:59,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 07:54:58" (1/3) ... [2023-01-28 07:54:59,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d055202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:54:59, skipping insertion in model container [2023-01-28 07:54:59,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:58" (2/3) ... [2023-01-28 07:54:59,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d055202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:54:59, skipping insertion in model container [2023-01-28 07:54:59,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:54:59" (3/3) ... [2023-01-28 07:54:59,073 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_41-trylock_racefree.i [2023-01-28 07:54:59,084 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 07:54:59,084 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 07:54:59,085 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 07:54:59,137 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-28 07:54:59,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 103 transitions, 214 flow [2023-01-28 07:54:59,206 INFO L130 PetriNetUnfolder]: 21/140 cut-off events. [2023-01-28 07:54:59,207 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:54:59,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 140 events. 21/140 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 339 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-01-28 07:54:59,212 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 103 transitions, 214 flow [2023-01-28 07:54:59,215 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 98 transitions, 201 flow [2023-01-28 07:54:59,218 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:54:59,224 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 88 places, 98 transitions, 201 flow [2023-01-28 07:54:59,227 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 88 places, 98 transitions, 201 flow [2023-01-28 07:54:59,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 98 transitions, 201 flow [2023-01-28 07:54:59,261 INFO L130 PetriNetUnfolder]: 20/135 cut-off events. [2023-01-28 07:54:59,262 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:54:59,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 135 events. 20/135 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 325 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-01-28 07:54:59,264 INFO L119 LiptonReduction]: Number of co-enabled transitions 2408 [2023-01-28 07:55:01,027 INFO L134 LiptonReduction]: Checked pairs total: 3879 [2023-01-28 07:55:01,027 INFO L136 LiptonReduction]: Total number of compositions: 78 [2023-01-28 07:55:01,037 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:55:01,041 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;@5d680e1f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:55:01,041 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:55:01,044 INFO L130 PetriNetUnfolder]: 3/17 cut-off events. [2023-01-28 07:55:01,044 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:55:01,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:01,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-28 07:55:01,045 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:55:01,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:01,049 INFO L85 PathProgramCache]: Analyzing trace with hash 383557292, now seen corresponding path program 1 times [2023-01-28 07:55:01,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:01,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828931711] [2023-01-28 07:55:01,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:01,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:01,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:55:01,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828931711] [2023-01-28 07:55:01,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828931711] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:55:01,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:55:01,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:55:01,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362184095] [2023-01-28 07:55:01,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:55:01,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:55:01,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:55:01,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:55:01,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:55:01,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 181 [2023-01-28 07:55:01,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:01,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:55:01,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 181 [2023-01-28 07:55:01,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:55:01,301 INFO L130 PetriNetUnfolder]: 89/209 cut-off events. [2023-01-28 07:55:01,301 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:55:01,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 209 events. 89/209 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 842 event pairs, 0 based on Foata normal form. 20/193 useless extension candidates. Maximal degree in co-relation 384. Up to 180 conditions per place. [2023-01-28 07:55:01,303 INFO L137 encePairwiseOnDemand]: 170/181 looper letters, 22 selfloop transitions, 2 changer transitions 7/33 dead transitions. [2023-01-28 07:55:01,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 131 flow [2023-01-28 07:55:01,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:55:01,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:55:01,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 288 transitions. [2023-01-28 07:55:01,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303867403314917 [2023-01-28 07:55:01,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 288 transitions. [2023-01-28 07:55:01,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 288 transitions. [2023-01-28 07:55:01,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:55:01,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 288 transitions. [2023-01-28 07:55:01,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:01,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:01,343 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:01,344 INFO L175 Difference]: Start difference. First operand has 26 places, 32 transitions, 69 flow. Second operand 3 states and 288 transitions. [2023-01-28 07:55:01,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 131 flow [2023-01-28 07:55:01,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 131 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:55:01,348 INFO L231 Difference]: Finished difference. Result has 29 places, 18 transitions, 47 flow [2023-01-28 07:55:01,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=29, PETRI_TRANSITIONS=18} [2023-01-28 07:55:01,352 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2023-01-28 07:55:01,352 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 18 transitions, 47 flow [2023-01-28 07:55:01,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:01,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:01,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:55:01,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 07:55:01,353 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:55:01,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:01,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1427432239, now seen corresponding path program 1 times [2023-01-28 07:55:01,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:01,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54496161] [2023-01-28 07:55:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:01,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:01,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:55:01,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54496161] [2023-01-28 07:55:01,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54496161] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:55:01,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123242336] [2023-01-28 07:55:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:01,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:55:01,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:55:01,471 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:55:01,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 07:55:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:01,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:55:01,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:55:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:01,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:55:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:01,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123242336] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:55:01,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:55:01,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:55:01,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633622075] [2023-01-28 07:55:01,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:55:01,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:55:01,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:55:01,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:55:01,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:55:01,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 181 [2023-01-28 07:55:01,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 18 transitions, 47 flow. Second operand has 7 states, 7 states have (on average 83.28571428571429) internal successors, (583), 7 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:01,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:55:01,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 181 [2023-01-28 07:55:01,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:55:01,676 INFO L130 PetriNetUnfolder]: 16/46 cut-off events. [2023-01-28 07:55:01,676 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-01-28 07:55:01,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 46 events. 16/46 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 85 event pairs, 0 based on Foata normal form. 9/55 useless extension candidates. Maximal degree in co-relation 103. Up to 34 conditions per place. [2023-01-28 07:55:01,677 INFO L137 encePairwiseOnDemand]: 178/181 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-01-28 07:55:01,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 22 transitions, 95 flow [2023-01-28 07:55:01,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 07:55:01,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 07:55:01,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 346 transitions. [2023-01-28 07:55:01,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47790055248618785 [2023-01-28 07:55:01,679 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 346 transitions. [2023-01-28 07:55:01,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 346 transitions. [2023-01-28 07:55:01,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:55:01,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 346 transitions. [2023-01-28 07:55:01,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 86.5) internal successors, (346), 4 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:01,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:01,682 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:01,682 INFO L175 Difference]: Start difference. First operand has 29 places, 18 transitions, 47 flow. Second operand 4 states and 346 transitions. [2023-01-28 07:55:01,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 22 transitions, 95 flow [2023-01-28 07:55:01,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 22 transitions, 89 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 07:55:01,683 INFO L231 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2023-01-28 07:55:01,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=19, PETRI_TRANSITIONS=0} [2023-01-28 07:55:01,684 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -7 predicate places. [2023-01-28 07:55:01,684 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2023-01-28 07:55:01,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.28571428571429) internal successors, (583), 7 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:01,686 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:55:01,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 07:55:01,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:55:01,892 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:55:01,894 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:55:01,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 103 transitions, 214 flow [2023-01-28 07:55:01,906 INFO L130 PetriNetUnfolder]: 21/140 cut-off events. [2023-01-28 07:55:01,906 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:55:01,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 140 events. 21/140 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 339 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-01-28 07:55:01,907 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 103 transitions, 214 flow [2023-01-28 07:55:01,908 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 98 transitions, 201 flow [2023-01-28 07:55:01,908 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:55:01,908 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 88 places, 98 transitions, 201 flow [2023-01-28 07:55:01,908 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 88 places, 98 transitions, 201 flow [2023-01-28 07:55:01,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 98 transitions, 201 flow [2023-01-28 07:55:01,917 INFO L130 PetriNetUnfolder]: 20/135 cut-off events. [2023-01-28 07:55:01,917 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:55:01,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 135 events. 20/135 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 325 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-01-28 07:55:01,919 INFO L119 LiptonReduction]: Number of co-enabled transitions 2408 [2023-01-28 07:55:03,453 INFO L134 LiptonReduction]: Checked pairs total: 3405 [2023-01-28 07:55:03,453 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-01-28 07:55:03,454 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:55:03,455 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;@5d680e1f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:55:03,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:55:03,457 INFO L130 PetriNetUnfolder]: 5/25 cut-off events. [2023-01-28 07:55:03,457 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:55:03,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:03,457 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-28 07:55:03,457 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:55:03,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:03,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1353910618, now seen corresponding path program 1 times [2023-01-28 07:55:03,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:03,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467899117] [2023-01-28 07:55:03,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:03,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:55:03,470 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:55:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:55:03,492 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:55:03,492 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:55:03,493 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:55:03,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 07:55:03,493 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:55:03,493 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:55:03,494 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:55:03,494 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 07:55:03,506 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 07:55:03,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 133 transitions, 284 flow [2023-01-28 07:55:03,520 INFO L130 PetriNetUnfolder]: 37/231 cut-off events. [2023-01-28 07:55:03,520 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:55:03,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 231 events. 37/231 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 663 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 142. Up to 9 conditions per place. [2023-01-28 07:55:03,521 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 133 transitions, 284 flow [2023-01-28 07:55:03,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 133 transitions, 284 flow [2023-01-28 07:55:03,522 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:55:03,522 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 133 transitions, 284 flow [2023-01-28 07:55:03,523 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 133 transitions, 284 flow [2023-01-28 07:55:03,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 133 transitions, 284 flow [2023-01-28 07:55:03,534 INFO L130 PetriNetUnfolder]: 37/231 cut-off events. [2023-01-28 07:55:03,534 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:55:03,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 231 events. 37/231 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 663 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 142. Up to 9 conditions per place. [2023-01-28 07:55:03,538 INFO L119 LiptonReduction]: Number of co-enabled transitions 7000 [2023-01-28 07:55:05,109 INFO L134 LiptonReduction]: Checked pairs total: 16435 [2023-01-28 07:55:05,109 INFO L136 LiptonReduction]: Total number of compositions: 91 [2023-01-28 07:55:05,110 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:55:05,111 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;@5d680e1f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:55:05,111 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:55:05,112 INFO L130 PetriNetUnfolder]: 4/20 cut-off events. [2023-01-28 07:55:05,113 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:55:05,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:05,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-28 07:55:05,113 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:55:05,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:05,113 INFO L85 PathProgramCache]: Analyzing trace with hash 701192273, now seen corresponding path program 1 times [2023-01-28 07:55:05,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:05,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581232839] [2023-01-28 07:55:05,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:05,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:05,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:55:05,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581232839] [2023-01-28 07:55:05,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581232839] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:55:05,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:55:05,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:55:05,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905353230] [2023-01-28 07:55:05,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:55:05,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:55:05,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:55:05,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:55:05,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:55:05,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 224 [2023-01-28 07:55:05,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 59 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:05,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:55:05,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 224 [2023-01-28 07:55:05,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:55:05,296 INFO L130 PetriNetUnfolder]: 1665/2829 cut-off events. [2023-01-28 07:55:05,296 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-01-28 07:55:05,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5563 conditions, 2829 events. 1665/2829 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 16010 event pairs, 1331 based on Foata normal form. 442/2906 useless extension candidates. Maximal degree in co-relation 2459. Up to 2666 conditions per place. [2023-01-28 07:55:05,303 INFO L137 encePairwiseOnDemand]: 206/224 looper letters, 32 selfloop transitions, 2 changer transitions 10/52 dead transitions. [2023-01-28 07:55:05,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 206 flow [2023-01-28 07:55:05,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:55:05,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:55:05,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 373 transitions. [2023-01-28 07:55:05,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5550595238095238 [2023-01-28 07:55:05,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 373 transitions. [2023-01-28 07:55:05,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 373 transitions. [2023-01-28 07:55:05,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:55:05,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 373 transitions. [2023-01-28 07:55:05,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:05,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 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) [2023-01-28 07:55:05,308 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 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) [2023-01-28 07:55:05,308 INFO L175 Difference]: Start difference. First operand has 46 places, 59 transitions, 136 flow. Second operand 3 states and 373 transitions. [2023-01-28 07:55:05,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 206 flow [2023-01-28 07:55:05,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 52 transitions, 206 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:55:05,310 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 86 flow [2023-01-28 07:55:05,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2023-01-28 07:55:05,311 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-01-28 07:55:05,311 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 86 flow [2023-01-28 07:55:05,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:05,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:05,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:55:05,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 07:55:05,312 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:55:05,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:05,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1040326354, now seen corresponding path program 1 times [2023-01-28 07:55:05,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:05,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880198673] [2023-01-28 07:55:05,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:05,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:05,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:55:05,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880198673] [2023-01-28 07:55:05,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880198673] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:55:05,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996865245] [2023-01-28 07:55:05,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:05,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:55:05,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:55:05,360 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:55:05,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 07:55:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:05,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:55:05,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:55:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:05,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:55:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:05,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996865245] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:55:05,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:55:05,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:55:05,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587917667] [2023-01-28 07:55:05,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:55:05,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:55:05,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:55:05,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:55:05,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:55:05,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 224 [2023-01-28 07:55:05,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 105.42857142857143) internal successors, (738), 7 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:05,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:55:05,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 224 [2023-01-28 07:55:05,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:55:05,522 INFO L130 PetriNetUnfolder]: 331/599 cut-off events. [2023-01-28 07:55:05,522 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2023-01-28 07:55:05,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1293 conditions, 599 events. 331/599 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2769 event pairs, 50 based on Foata normal form. 80/676 useless extension candidates. Maximal degree in co-relation 905. Up to 398 conditions per place. [2023-01-28 07:55:05,524 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 0 selfloop transitions, 0 changer transitions 53/53 dead transitions. [2023-01-28 07:55:05,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 53 transitions, 212 flow [2023-01-28 07:55:05,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 07:55:05,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 07:55:05,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 562 transitions. [2023-01-28 07:55:05,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017857142857143 [2023-01-28 07:55:05,526 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 562 transitions. [2023-01-28 07:55:05,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 562 transitions. [2023-01-28 07:55:05,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:55:05,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 562 transitions. [2023-01-28 07:55:05,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.4) internal successors, (562), 5 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:05,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:05,530 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:05,530 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 86 flow. Second operand 5 states and 562 transitions. [2023-01-28 07:55:05,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 53 transitions, 212 flow [2023-01-28 07:55:05,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 53 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 07:55:05,531 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-01-28 07:55:05,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-01-28 07:55:05,532 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -7 predicate places. [2023-01-28 07:55:05,532 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-01-28 07:55:05,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 105.42857142857143) internal successors, (738), 7 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:05,533 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:55:05,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 07:55:05,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:55:05,738 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:55:05,738 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:55:05,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 133 transitions, 284 flow [2023-01-28 07:55:05,751 INFO L130 PetriNetUnfolder]: 37/231 cut-off events. [2023-01-28 07:55:05,751 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:55:05,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 231 events. 37/231 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 663 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 142. Up to 9 conditions per place. [2023-01-28 07:55:05,752 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 133 transitions, 284 flow [2023-01-28 07:55:05,753 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 133 transitions, 284 flow [2023-01-28 07:55:05,753 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:55:05,753 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 133 transitions, 284 flow [2023-01-28 07:55:05,753 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 133 transitions, 284 flow [2023-01-28 07:55:05,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 133 transitions, 284 flow [2023-01-28 07:55:05,775 INFO L130 PetriNetUnfolder]: 37/231 cut-off events. [2023-01-28 07:55:05,775 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:55:05,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 231 events. 37/231 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 663 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 142. Up to 9 conditions per place. [2023-01-28 07:55:05,778 INFO L119 LiptonReduction]: Number of co-enabled transitions 7000 [2023-01-28 07:55:07,434 INFO L134 LiptonReduction]: Checked pairs total: 16417 [2023-01-28 07:55:07,434 INFO L136 LiptonReduction]: Total number of compositions: 92 [2023-01-28 07:55:07,435 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:55:07,436 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;@5d680e1f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:55:07,436 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:55:07,440 INFO L130 PetriNetUnfolder]: 15/63 cut-off events. [2023-01-28 07:55:07,440 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 07:55:07,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:07,440 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-28 07:55:07,440 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:55:07,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:07,441 INFO L85 PathProgramCache]: Analyzing trace with hash 419103144, now seen corresponding path program 1 times [2023-01-28 07:55:07,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:07,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902068256] [2023-01-28 07:55:07,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:07,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:55:07,457 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:55:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:55:07,468 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:55:07,468 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:55:07,468 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:55:07,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 07:55:07,468 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:55:07,469 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:55:07,469 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:55:07,469 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 07:55:07,484 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 07:55:07,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 163 transitions, 356 flow [2023-01-28 07:55:07,511 INFO L130 PetriNetUnfolder]: 58/353 cut-off events. [2023-01-28 07:55:07,511 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:55:07,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 353 events. 58/353 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1126 event pairs, 1 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 239. Up to 16 conditions per place. [2023-01-28 07:55:07,514 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 163 transitions, 356 flow [2023-01-28 07:55:07,516 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 163 transitions, 356 flow [2023-01-28 07:55:07,516 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:55:07,516 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 163 transitions, 356 flow [2023-01-28 07:55:07,517 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 163 transitions, 356 flow [2023-01-28 07:55:07,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 163 transitions, 356 flow [2023-01-28 07:55:07,542 INFO L130 PetriNetUnfolder]: 58/353 cut-off events. [2023-01-28 07:55:07,542 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:55:07,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 353 events. 58/353 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1126 event pairs, 1 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 239. Up to 16 conditions per place. [2023-01-28 07:55:07,554 INFO L119 LiptonReduction]: Number of co-enabled transitions 13104 [2023-01-28 07:55:09,232 INFO L134 LiptonReduction]: Checked pairs total: 29489 [2023-01-28 07:55:09,232 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-01-28 07:55:09,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:55:09,234 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;@5d680e1f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:55:09,234 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:55:09,235 INFO L130 PetriNetUnfolder]: 4/19 cut-off events. [2023-01-28 07:55:09,235 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:55:09,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:09,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-28 07:55:09,235 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:55:09,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:09,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1074176198, now seen corresponding path program 1 times [2023-01-28 07:55:09,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:09,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257373907] [2023-01-28 07:55:09,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:09,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:09,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:09,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:55:09,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257373907] [2023-01-28 07:55:09,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257373907] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:55:09,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:55:09,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:55:09,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521796226] [2023-01-28 07:55:09,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:55:09,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:55:09,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:55:09,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:55:09,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:55:09,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 269 [2023-01-28 07:55:09,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 78 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:09,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:55:09,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 269 [2023-01-28 07:55:09,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:55:11,166 INFO L130 PetriNetUnfolder]: 21048/32110 cut-off events. [2023-01-28 07:55:11,166 INFO L131 PetriNetUnfolder]: For 929/929 co-relation queries the response was YES. [2023-01-28 07:55:11,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62405 conditions, 32110 events. 21048/32110 cut-off events. For 929/929 co-relation queries the response was YES. Maximal size of possible extension queue 933. Compared 227786 event pairs, 12977 based on Foata normal form. 5716/34332 useless extension candidates. Maximal degree in co-relation 6327. Up to 29586 conditions per place. [2023-01-28 07:55:11,274 INFO L137 encePairwiseOnDemand]: 245/269 looper letters, 41 selfloop transitions, 2 changer transitions 11/66 dead transitions. [2023-01-28 07:55:11,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 66 transitions, 266 flow [2023-01-28 07:55:11,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:55:11,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:55:11,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 455 transitions. [2023-01-28 07:55:11,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.563816604708798 [2023-01-28 07:55:11,275 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 455 transitions. [2023-01-28 07:55:11,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 455 transitions. [2023-01-28 07:55:11,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:55:11,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 455 transitions. [2023-01-28 07:55:11,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:11,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:11,278 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:11,278 INFO L175 Difference]: Start difference. First operand has 60 places, 78 transitions, 186 flow. Second operand 3 states and 455 transitions. [2023-01-28 07:55:11,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 66 transitions, 266 flow [2023-01-28 07:55:11,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 66 transitions, 266 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:55:11,282 INFO L231 Difference]: Finished difference. Result has 62 places, 46 transitions, 117 flow [2023-01-28 07:55:11,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=62, PETRI_TRANSITIONS=46} [2023-01-28 07:55:11,283 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2023-01-28 07:55:11,283 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 46 transitions, 117 flow [2023-01-28 07:55:11,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:11,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:11,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:55:11,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 07:55:11,284 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:55:11,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:11,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1082791144, now seen corresponding path program 1 times [2023-01-28 07:55:11,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:11,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300230382] [2023-01-28 07:55:11,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:11,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:11,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:55:11,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300230382] [2023-01-28 07:55:11,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300230382] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:55:11,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579471873] [2023-01-28 07:55:11,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:11,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:55:11,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:55:11,326 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:55:11,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 07:55:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:11,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:55:11,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:55:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:11,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:55:11,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:11,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579471873] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:55:11,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:55:11,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:55:11,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048759265] [2023-01-28 07:55:11,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:55:11,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:55:11,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:55:11,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:55:11,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:55:11,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 269 [2023-01-28 07:55:11,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 46 transitions, 117 flow. Second operand has 7 states, 7 states have (on average 127.42857142857143) internal successors, (892), 7 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:11,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:55:11,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 269 [2023-01-28 07:55:11,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:55:11,800 INFO L130 PetriNetUnfolder]: 4372/6619 cut-off events. [2023-01-28 07:55:11,800 INFO L131 PetriNetUnfolder]: For 1134/1134 co-relation queries the response was YES. [2023-01-28 07:55:11,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13991 conditions, 6619 events. 4372/6619 cut-off events. For 1134/1134 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 38886 event pairs, 504 based on Foata normal form. 657/7240 useless extension candidates. Maximal degree in co-relation 1597. Up to 4122 conditions per place. [2023-01-28 07:55:11,812 INFO L137 encePairwiseOnDemand]: 266/269 looper letters, 0 selfloop transitions, 0 changer transitions 91/91 dead transitions. [2023-01-28 07:55:11,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 91 transitions, 365 flow [2023-01-28 07:55:11,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 07:55:11,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 07:55:11,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 832 transitions. [2023-01-28 07:55:11,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5154894671623296 [2023-01-28 07:55:11,814 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 832 transitions. [2023-01-28 07:55:11,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 832 transitions. [2023-01-28 07:55:11,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:55:11,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 832 transitions. [2023-01-28 07:55:11,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 138.66666666666666) internal successors, (832), 6 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:11,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 269.0) internal successors, (1883), 7 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:11,818 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 269.0) internal successors, (1883), 7 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:11,818 INFO L175 Difference]: Start difference. First operand has 62 places, 46 transitions, 117 flow. Second operand 6 states and 832 transitions. [2023-01-28 07:55:11,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 91 transitions, 365 flow [2023-01-28 07:55:11,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 91 transitions, 361 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 07:55:11,819 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2023-01-28 07:55:11,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=54, PETRI_TRANSITIONS=0} [2023-01-28 07:55:11,820 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -6 predicate places. [2023-01-28 07:55:11,820 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2023-01-28 07:55:11,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 127.42857142857143) internal successors, (892), 7 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:11,820 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:55:11,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-28 07:55:12,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:55:12,024 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:55:12,025 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:55:12,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 163 transitions, 356 flow [2023-01-28 07:55:12,063 INFO L130 PetriNetUnfolder]: 58/353 cut-off events. [2023-01-28 07:55:12,063 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:55:12,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 353 events. 58/353 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1126 event pairs, 1 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 239. Up to 16 conditions per place. [2023-01-28 07:55:12,064 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 163 transitions, 356 flow [2023-01-28 07:55:12,065 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 163 transitions, 356 flow [2023-01-28 07:55:12,065 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:55:12,065 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 163 transitions, 356 flow [2023-01-28 07:55:12,066 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 163 transitions, 356 flow [2023-01-28 07:55:12,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 163 transitions, 356 flow [2023-01-28 07:55:12,082 INFO L130 PetriNetUnfolder]: 58/353 cut-off events. [2023-01-28 07:55:12,083 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:55:12,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 353 events. 58/353 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1126 event pairs, 1 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 239. Up to 16 conditions per place. [2023-01-28 07:55:12,090 INFO L119 LiptonReduction]: Number of co-enabled transitions 13104 [2023-01-28 07:55:13,754 INFO L134 LiptonReduction]: Checked pairs total: 33143 [2023-01-28 07:55:13,754 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-01-28 07:55:13,755 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:55:13,755 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;@5d680e1f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:55:13,755 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:55:13,759 INFO L130 PetriNetUnfolder]: 28/104 cut-off events. [2023-01-28 07:55:13,759 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-01-28 07:55:13,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:13,759 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-28 07:55:13,760 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:55:13,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:13,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1307292255, now seen corresponding path program 1 times [2023-01-28 07:55:13,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:13,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714289829] [2023-01-28 07:55:13,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:13,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:55:13,770 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:55:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:55:13,778 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:55:13,778 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:55:13,778 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:55:13,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 07:55:13,778 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:55:13,779 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:55:13,779 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:55:13,779 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-28 07:55:13,790 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-28 07:55:13,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 193 transitions, 430 flow [2023-01-28 07:55:13,827 INFO L130 PetriNetUnfolder]: 91/539 cut-off events. [2023-01-28 07:55:13,827 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:55:13,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 539 events. 91/539 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1993 event pairs, 6 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 373. Up to 32 conditions per place. [2023-01-28 07:55:13,830 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 193 transitions, 430 flow [2023-01-28 07:55:13,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 193 transitions, 430 flow [2023-01-28 07:55:13,834 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:55:13,834 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 193 transitions, 430 flow [2023-01-28 07:55:13,834 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 193 transitions, 430 flow [2023-01-28 07:55:13,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 193 transitions, 430 flow [2023-01-28 07:55:13,880 INFO L130 PetriNetUnfolder]: 91/539 cut-off events. [2023-01-28 07:55:13,880 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:55:13,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 539 events. 91/539 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1993 event pairs, 6 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 373. Up to 32 conditions per place. [2023-01-28 07:55:13,891 INFO L119 LiptonReduction]: Number of co-enabled transitions 20944 [2023-01-28 07:55:15,671 INFO L134 LiptonReduction]: Checked pairs total: 51259 [2023-01-28 07:55:15,672 INFO L136 LiptonReduction]: Total number of compositions: 122 [2023-01-28 07:55:15,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:55:15,673 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;@5d680e1f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:55:15,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:55:15,674 INFO L130 PetriNetUnfolder]: 2/15 cut-off events. [2023-01-28 07:55:15,674 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:55:15,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:15,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-28 07:55:15,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:55:15,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:15,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1504507769, now seen corresponding path program 1 times [2023-01-28 07:55:15,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:15,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368228834] [2023-01-28 07:55:15,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:15,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:15,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:55:15,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368228834] [2023-01-28 07:55:15,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368228834] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:55:15,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:55:15,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:55:15,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235018606] [2023-01-28 07:55:15,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:55:15,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:55:15,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:55:15,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:55:15,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:55:15,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 315 [2023-01-28 07:55:15,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 95 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:15,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:55:15,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 315 [2023-01-28 07:55:15,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:55:38,924 INFO L130 PetriNetUnfolder]: 298317/406719 cut-off events. [2023-01-28 07:55:38,924 INFO L131 PetriNetUnfolder]: For 14730/14730 co-relation queries the response was YES. [2023-01-28 07:55:39,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802382 conditions, 406719 events. 298317/406719 cut-off events. For 14730/14730 co-relation queries the response was YES. Maximal size of possible extension queue 8300. Compared 3051593 event pairs, 214660 based on Foata normal form. 65452/440647 useless extension candidates. Maximal degree in co-relation 69542. Up to 387526 conditions per place. [2023-01-28 07:55:40,414 INFO L137 encePairwiseOnDemand]: 286/315 looper letters, 51 selfloop transitions, 2 changer transitions 12/79 dead transitions. [2023-01-28 07:55:40,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 328 flow [2023-01-28 07:55:40,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:55:40,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:55:40,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2023-01-28 07:55:40,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5682539682539682 [2023-01-28 07:55:40,416 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2023-01-28 07:55:40,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2023-01-28 07:55:40,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:55:40,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2023-01-28 07:55:40,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:40,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:40,419 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:40,419 INFO L175 Difference]: Start difference. First operand has 73 places, 95 transitions, 234 flow. Second operand 3 states and 537 transitions. [2023-01-28 07:55:40,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 328 flow [2023-01-28 07:55:40,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 79 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:55:40,426 INFO L231 Difference]: Finished difference. Result has 76 places, 58 transitions, 150 flow [2023-01-28 07:55:40,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=76, PETRI_TRANSITIONS=58} [2023-01-28 07:55:40,426 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-01-28 07:55:40,426 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 58 transitions, 150 flow [2023-01-28 07:55:40,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:40,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:40,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:55:40,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 07:55:40,427 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:55:40,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:40,427 INFO L85 PathProgramCache]: Analyzing trace with hash -314396294, now seen corresponding path program 1 times [2023-01-28 07:55:40,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:40,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812886356] [2023-01-28 07:55:40,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:40,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:40,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:55:40,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812886356] [2023-01-28 07:55:40,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812886356] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:55:40,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606407048] [2023-01-28 07:55:40,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:40,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:55:40,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:55:40,455 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:55:40,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 07:55:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:40,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:55:40,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:55:40,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:40,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:55:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:40,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606407048] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:55:40,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:55:40,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-01-28 07:55:40,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421452614] [2023-01-28 07:55:40,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:55:40,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 07:55:40,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:55:40,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 07:55:40,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-01-28 07:55:40,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 315 [2023-01-28 07:55:40,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 58 transitions, 150 flow. Second operand has 6 states, 6 states have (on average 149.16666666666666) internal successors, (895), 6 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:40,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:55:40,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 315 [2023-01-28 07:55:40,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:55:50,856 INFO L130 PetriNetUnfolder]: 150148/201202 cut-off events. [2023-01-28 07:55:50,856 INFO L131 PetriNetUnfolder]: For 15363/15363 co-relation queries the response was YES. [2023-01-28 07:55:51,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410331 conditions, 201202 events. 150148/201202 cut-off events. For 15363/15363 co-relation queries the response was YES. Maximal size of possible extension queue 4578. Compared 1381843 event pairs, 19242 based on Foata normal form. 729/196090 useless extension candidates. Maximal degree in co-relation 46647. Up to 138268 conditions per place. [2023-01-28 07:55:51,638 INFO L137 encePairwiseOnDemand]: 311/315 looper letters, 121 selfloop transitions, 5 changer transitions 1/141 dead transitions. [2023-01-28 07:55:51,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 141 transitions, 574 flow [2023-01-28 07:55:51,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 07:55:51,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 07:55:51,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1012 transitions. [2023-01-28 07:55:51,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5354497354497354 [2023-01-28 07:55:51,640 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1012 transitions. [2023-01-28 07:55:51,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1012 transitions. [2023-01-28 07:55:51,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:55:51,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1012 transitions. [2023-01-28 07:55:51,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 168.66666666666666) internal successors, (1012), 6 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:51,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 315.0) internal successors, (2205), 7 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:51,644 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 315.0) internal successors, (2205), 7 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:51,644 INFO L175 Difference]: Start difference. First operand has 76 places, 58 transitions, 150 flow. Second operand 6 states and 1012 transitions. [2023-01-28 07:55:51,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 141 transitions, 574 flow [2023-01-28 07:55:51,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 141 transitions, 566 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-01-28 07:55:51,648 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 176 flow [2023-01-28 07:55:51,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=176, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-01-28 07:55:51,649 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-01-28 07:55:51,649 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 176 flow [2023-01-28 07:55:51,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.16666666666666) internal successors, (895), 6 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:51,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:51,649 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:55:51,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-01-28 07:55:51,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:55:51,854 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:55:51,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:51,854 INFO L85 PathProgramCache]: Analyzing trace with hash -2036142589, now seen corresponding path program 1 times [2023-01-28 07:55:51,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:51,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546646646] [2023-01-28 07:55:51,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:51,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:51,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-01-28 07:55:51,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:55:51,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546646646] [2023-01-28 07:55:51,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546646646] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:55:51,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:55:51,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 07:55:51,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302211840] [2023-01-28 07:55:51,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:55:51,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:55:51,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:55:51,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:55:51,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:55:51,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 315 [2023-01-28 07:55:51,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:51,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:55:51,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 315 [2023-01-28 07:55:51,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:56:08,324 INFO L130 PetriNetUnfolder]: 245410/321286 cut-off events. [2023-01-28 07:56:08,325 INFO L131 PetriNetUnfolder]: For 187060/187060 co-relation queries the response was YES. [2023-01-28 07:56:08,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721383 conditions, 321286 events. 245410/321286 cut-off events. For 187060/187060 co-relation queries the response was YES. Maximal size of possible extension queue 6154. Compared 2083608 event pairs, 109504 based on Foata normal form. 192/310331 useless extension candidates. Maximal degree in co-relation 574693. Up to 310023 conditions per place. [2023-01-28 07:56:09,858 INFO L137 encePairwiseOnDemand]: 309/315 looper letters, 74 selfloop transitions, 5 changer transitions 0/87 dead transitions. [2023-01-28 07:56:09,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 87 transitions, 436 flow [2023-01-28 07:56:09,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:56:09,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:56:09,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 482 transitions. [2023-01-28 07:56:09,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5100529100529101 [2023-01-28 07:56:09,860 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 482 transitions. [2023-01-28 07:56:09,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 482 transitions. [2023-01-28 07:56:09,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:56:09,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 482 transitions. [2023-01-28 07:56:09,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:56:09,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:56:09,862 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:56:09,862 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 176 flow. Second operand 3 states and 482 transitions. [2023-01-28 07:56:09,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 87 transitions, 436 flow [2023-01-28 07:56:09,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 87 transitions, 416 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-01-28 07:56:09,906 INFO L231 Difference]: Finished difference. Result has 76 places, 64 transitions, 198 flow [2023-01-28 07:56:09,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=76, PETRI_TRANSITIONS=64} [2023-01-28 07:56:09,906 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-01-28 07:56:09,906 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 64 transitions, 198 flow [2023-01-28 07:56:09,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:56:09,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:56:09,907 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:56:09,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-28 07:56:09,907 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:56:09,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:56:09,907 INFO L85 PathProgramCache]: Analyzing trace with hash -2291416, now seen corresponding path program 1 times [2023-01-28 07:56:09,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:56:09,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62098304] [2023-01-28 07:56:09,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:56:09,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:56:09,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:56:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:56:09,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:56:09,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62098304] [2023-01-28 07:56:09,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62098304] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:56:09,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437330140] [2023-01-28 07:56:09,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:56:09,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:56:09,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:56:09,992 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:56:10,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 07:56:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:56:10,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 07:56:10,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:56:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:56:10,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:56:10,162 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:56:10,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437330140] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:56:10,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:56:10,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-01-28 07:56:10,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291329915] [2023-01-28 07:56:10,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:56:10,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 07:56:10,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:56:10,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 07:56:10,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-01-28 07:56:10,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 315 [2023-01-28 07:56:10,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 64 transitions, 198 flow. Second operand has 12 states, 12 states have (on average 150.0) internal successors, (1800), 12 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:56:10,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:56:10,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 315 [2023-01-28 07:56:10,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:56:13,824 INFO L130 PetriNetUnfolder]: 45720/64315 cut-off events. [2023-01-28 07:56:13,825 INFO L131 PetriNetUnfolder]: For 48183/48183 co-relation queries the response was YES. [2023-01-28 07:56:13,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142193 conditions, 64315 events. 45720/64315 cut-off events. For 48183/48183 co-relation queries the response was YES. Maximal size of possible extension queue 1638. Compared 432977 event pairs, 918 based on Foata normal form. 6534/70556 useless extension candidates. Maximal degree in co-relation 90446. Up to 29619 conditions per place. [2023-01-28 07:56:13,986 INFO L137 encePairwiseOnDemand]: 312/315 looper letters, 0 selfloop transitions, 0 changer transitions 145/145 dead transitions. [2023-01-28 07:56:13,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 145 transitions, 649 flow [2023-01-28 07:56:13,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 07:56:13,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 07:56:13,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1151 transitions. [2023-01-28 07:56:13,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219954648526077 [2023-01-28 07:56:13,988 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1151 transitions. [2023-01-28 07:56:13,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1151 transitions. [2023-01-28 07:56:13,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:56:13,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1151 transitions. [2023-01-28 07:56:13,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 164.42857142857142) internal successors, (1151), 7 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:56:13,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 315.0) internal successors, (2520), 8 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:56:13,993 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 315.0) internal successors, (2520), 8 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:56:13,993 INFO L175 Difference]: Start difference. First operand has 76 places, 64 transitions, 198 flow. Second operand 7 states and 1151 transitions. [2023-01-28 07:56:13,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 145 transitions, 649 flow [2023-01-28 07:56:14,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 145 transitions, 629 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-01-28 07:56:14,003 INFO L231 Difference]: Finished difference. Result has 73 places, 0 transitions, 0 flow [2023-01-28 07:56:14,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=73, PETRI_TRANSITIONS=0} [2023-01-28 07:56:14,004 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 0 predicate places. [2023-01-28 07:56:14,004 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 0 transitions, 0 flow [2023-01-28 07:56:14,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 150.0) internal successors, (1800), 12 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:56:14,005 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:56:14,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 07:56:14,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-28 07:56:14,209 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-01-28 07:56:14,209 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:56:14,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 193 transitions, 430 flow [2023-01-28 07:56:14,243 INFO L130 PetriNetUnfolder]: 91/539 cut-off events. [2023-01-28 07:56:14,243 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:56:14,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 539 events. 91/539 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1993 event pairs, 6 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 373. Up to 32 conditions per place. [2023-01-28 07:56:14,246 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 193 transitions, 430 flow [2023-01-28 07:56:14,248 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 193 transitions, 430 flow [2023-01-28 07:56:14,248 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:56:14,248 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 193 transitions, 430 flow [2023-01-28 07:56:14,248 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 193 transitions, 430 flow [2023-01-28 07:56:14,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 193 transitions, 430 flow [2023-01-28 07:56:14,280 INFO L130 PetriNetUnfolder]: 91/539 cut-off events. [2023-01-28 07:56:14,281 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:56:14,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 539 events. 91/539 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1993 event pairs, 6 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 373. Up to 32 conditions per place. [2023-01-28 07:56:14,289 INFO L119 LiptonReduction]: Number of co-enabled transitions 20944 [2023-01-28 07:56:15,973 INFO L134 LiptonReduction]: Checked pairs total: 63891 [2023-01-28 07:56:15,974 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-01-28 07:56:15,975 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:56:15,975 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;@5d680e1f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:56:15,975 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:56:15,981 INFO L130 PetriNetUnfolder]: 40/149 cut-off events. [2023-01-28 07:56:15,981 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-01-28 07:56:15,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:56:15,981 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-28 07:56:15,981 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:56:15,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:56:15,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1002577702, now seen corresponding path program 1 times [2023-01-28 07:56:15,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:56:15,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657144119] [2023-01-28 07:56:15,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:56:15,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:56:15,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:56:15,996 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:56:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:56:16,014 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:56:16,015 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:56:16,015 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:56:16,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-01-28 07:56:16,015 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:56:16,017 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:56:16,017 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:56:16,017 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-28 07:56:16,039 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-01-28 07:56:16,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 223 transitions, 506 flow [2023-01-28 07:56:16,104 INFO L130 PetriNetUnfolder]: 152/857 cut-off events. [2023-01-28 07:56:16,104 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-28 07:56:16,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 857 events. 152/857 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3732 event pairs, 23 based on Foata normal form. 0/715 useless extension candidates. Maximal degree in co-relation 584. Up to 80 conditions per place. [2023-01-28 07:56:16,110 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 223 transitions, 506 flow [2023-01-28 07:56:16,113 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 223 transitions, 506 flow [2023-01-28 07:56:16,113 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:56:16,113 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 223 transitions, 506 flow [2023-01-28 07:56:16,113 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 223 transitions, 506 flow [2023-01-28 07:56:16,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 223 transitions, 506 flow [2023-01-28 07:56:16,320 INFO L130 PetriNetUnfolder]: 152/857 cut-off events. [2023-01-28 07:56:16,320 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-28 07:56:16,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 857 events. 152/857 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3732 event pairs, 23 based on Foata normal form. 0/715 useless extension candidates. Maximal degree in co-relation 584. Up to 80 conditions per place. [2023-01-28 07:56:16,343 INFO L119 LiptonReduction]: Number of co-enabled transitions 30520 [2023-01-28 07:56:18,076 INFO L134 LiptonReduction]: Checked pairs total: 84639 [2023-01-28 07:56:18,076 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-01-28 07:56:18,077 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:56:18,077 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;@5d680e1f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:56:18,077 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:56:18,078 INFO L130 PetriNetUnfolder]: 4/20 cut-off events. [2023-01-28 07:56:18,079 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:56:18,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:56:18,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-28 07:56:18,079 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:56:18,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:56:18,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1990845393, now seen corresponding path program 1 times [2023-01-28 07:56:18,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:56:18,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243294225] [2023-01-28 07:56:18,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:56:18,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:56:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:56:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:56:18,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:56:18,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243294225] [2023-01-28 07:56:18,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243294225] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:56:18,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:56:18,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:56:18,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037373848] [2023-01-28 07:56:18,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:56:18,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:56:18,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:56:18,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:56:18,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:56:18,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 359 [2023-01-28 07:56:18,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 116 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:56:18,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:56:18,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 359 [2023-01-28 07:56:18,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand