/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_22-deref_read_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 07:51:53,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 07:51:53,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 07:51:53,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 07:51:53,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 07:51:53,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 07:51:53,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 07:51:53,717 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 07:51:53,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 07:51:53,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 07:51:53,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 07:51:53,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 07:51:53,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 07:51:53,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 07:51:53,721 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 07:51:53,722 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 07:51:53,722 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 07:51:53,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 07:51:53,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 07:51:53,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 07:51:53,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 07:51:53,726 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 07:51:53,727 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 07:51:53,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 07:51:53,729 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-28 07:51:53,731 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 07:51:53,731 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 07:51:53,732 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 07:51:53,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 07:51:53,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 07:51:53,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 07:51:53,733 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 07:51:53,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 07:51:53,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 07:51:53,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 07:51:53,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 07:51:53,735 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 07:51:53,748 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 07:51:53,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 07:51:53,749 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 07:51:53,749 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 07:51:53,749 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 07:51:53,749 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 07:51:53,749 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 07:51:53,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 07:51:53,750 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 07:51:53,750 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 07:51:53,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 07:51:53,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 07:51:53,750 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 07:51:53,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 07:51:53,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 07:51:53,750 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 07:51:53,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 07:51:53,751 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 07:51:53,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 07:51:53,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 07:51:53,751 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 07:51:53,751 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 07:51:53,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 07:51:53,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:51:53,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 07:51:53,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 07:51:53,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 07:51:53,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 07:51:53,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 07:51:53,752 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 07:51:53,752 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 07:51:53,752 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 07:51:53,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 07:51:53,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 07:51:53,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 07:51:53,976 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 07:51:53,977 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 07:51:53,977 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_22-deref_read_racefree.i [2023-01-28 07:51:54,946 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 07:51:55,172 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 07:51:55,173 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_22-deref_read_racefree.i [2023-01-28 07:51:55,180 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c00a7630/401774765b4945b19d92489c33fbb95c/FLAG8c677fd04 [2023-01-28 07:51:55,191 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c00a7630/401774765b4945b19d92489c33fbb95c [2023-01-28 07:51:55,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 07:51:55,195 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 07:51:55,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 07:51:55,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 07:51:55,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 07:51:55,198 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:51:55" (1/1) ... [2023-01-28 07:51:55,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59cae329 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:55, skipping insertion in model container [2023-01-28 07:51:55,199 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:51:55" (1/1) ... [2023-01-28 07:51:55,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 07:51:55,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 07:51:55,419 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_22-deref_read_racefree.i[30176,30189] [2023-01-28 07:51:55,439 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:51:55,448 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 07:51:55,490 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_22-deref_read_racefree.i[30176,30189] [2023-01-28 07:51:55,494 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:51:55,520 INFO L208 MainTranslator]: Completed translation [2023-01-28 07:51:55,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:55 WrapperNode [2023-01-28 07:51:55,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 07:51:55,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 07:51:55,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 07:51:55,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 07:51:55,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:55" (1/1) ... [2023-01-28 07:51:55,548 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:55" (1/1) ... [2023-01-28 07:51:55,566 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2023-01-28 07:51:55,567 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 07:51:55,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 07:51:55,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 07:51:55,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 07:51:55,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:55" (1/1) ... [2023-01-28 07:51:55,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:55" (1/1) ... [2023-01-28 07:51:55,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:55" (1/1) ... [2023-01-28 07:51:55,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:55" (1/1) ... [2023-01-28 07:51:55,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:55" (1/1) ... [2023-01-28 07:51:55,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:55" (1/1) ... [2023-01-28 07:51:55,593 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:55" (1/1) ... [2023-01-28 07:51:55,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:55" (1/1) ... [2023-01-28 07:51:55,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 07:51:55,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 07:51:55,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 07:51:55,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 07:51:55,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:55" (1/1) ... [2023-01-28 07:51:55,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:51:55,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:51:55,616 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 07:51:55,617 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 07:51:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 07:51:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 07:51:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 07:51:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 07:51:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 07:51:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-28 07:51:55,661 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-28 07:51:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 07:51:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 07:51:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 07:51:55,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 07:51:55,662 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 07:51:55,787 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 07:51:55,789 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 07:51:55,945 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 07:51:55,949 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 07:51:55,950 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-01-28 07:51:55,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:51:55 BoogieIcfgContainer [2023-01-28 07:51:55,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 07:51:55,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 07:51:55,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 07:51:55,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 07:51:55,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 07:51:55" (1/3) ... [2023-01-28 07:51:55,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436c2112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:51:55, skipping insertion in model container [2023-01-28 07:51:55,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:55" (2/3) ... [2023-01-28 07:51:55,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436c2112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:51:55, skipping insertion in model container [2023-01-28 07:51:55,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:51:55" (3/3) ... [2023-01-28 07:51:55,956 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_22-deref_read_racefree.i [2023-01-28 07:51:55,968 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 07:51:55,968 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 07:51:55,968 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 07:51:56,006 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 07:51:56,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 100 transitions, 205 flow [2023-01-28 07:51:56,080 INFO L130 PetriNetUnfolder]: 14/131 cut-off events. [2023-01-28 07:51:56,080 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:51:56,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 131 events. 14/131 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 289 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-01-28 07:51:56,085 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 100 transitions, 205 flow [2023-01-28 07:51:56,088 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 100 transitions, 205 flow [2023-01-28 07:51:56,091 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:51:56,097 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 100 transitions, 205 flow [2023-01-28 07:51:56,099 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 100 transitions, 205 flow [2023-01-28 07:51:56,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 100 transitions, 205 flow [2023-01-28 07:51:56,120 INFO L130 PetriNetUnfolder]: 14/131 cut-off events. [2023-01-28 07:51:56,120 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:51:56,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 131 events. 14/131 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 289 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-01-28 07:51:56,127 INFO L119 LiptonReduction]: Number of co-enabled transitions 2368 [2023-01-28 07:51:58,284 INFO L134 LiptonReduction]: Checked pairs total: 4764 [2023-01-28 07:51:58,284 INFO L136 LiptonReduction]: Total number of compositions: 84 [2023-01-28 07:51:58,302 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:51:58,306 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;@3c5d344b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:51:58,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:51:58,309 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-28 07:51:58,309 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:51:58,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:51:58,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:51:58,309 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:51:58,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:51:58,313 INFO L85 PathProgramCache]: Analyzing trace with hash 11987027, now seen corresponding path program 1 times [2023-01-28 07:51:58,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:51:58,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592069653] [2023-01-28 07:51:58,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:51:58,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:51:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:51:58,477 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 07:51:58,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:51:58,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592069653] [2023-01-28 07:51:58,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592069653] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:51:58,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:51:58,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:51:58,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663941559] [2023-01-28 07:51:58,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:51:58,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:51:58,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:51:58,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:51:58,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:51:58,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 184 [2023-01-28 07:51:58,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 30 transitions, 65 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 07:51:58,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:51:58,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 184 [2023-01-28 07:51:58,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:51:58,575 INFO L130 PetriNetUnfolder]: 72/176 cut-off events. [2023-01-28 07:51:58,575 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:51:58,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 176 events. 72/176 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 562 event pairs, 56 based on Foata normal form. 18/174 useless extension candidates. Maximal degree in co-relation 332. Up to 153 conditions per place. [2023-01-28 07:51:58,577 INFO L137 encePairwiseOnDemand]: 173/184 looper letters, 23 selfloop transitions, 2 changer transitions 5/32 dead transitions. [2023-01-28 07:51:58,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 32 transitions, 127 flow [2023-01-28 07:51:58,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:51:58,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:51:58,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2023-01-28 07:51:58,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519927536231884 [2023-01-28 07:51:58,586 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 287 transitions. [2023-01-28 07:51:58,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 287 transitions. [2023-01-28 07:51:58,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:51:58,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 287 transitions. [2023-01-28 07:51:58,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 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 07:51:58,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 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 07:51:58,594 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 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 07:51:58,595 INFO L175 Difference]: Start difference. First operand has 25 places, 30 transitions, 65 flow. Second operand 3 states and 287 transitions. [2023-01-28 07:51:58,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 32 transitions, 127 flow [2023-01-28 07:51:58,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 32 transitions, 127 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:51:58,605 INFO L231 Difference]: Finished difference. Result has 28 places, 18 transitions, 47 flow [2023-01-28 07:51:58,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=28, PETRI_TRANSITIONS=18} [2023-01-28 07:51:58,608 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-01-28 07:51:58,608 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 18 transitions, 47 flow [2023-01-28 07:51:58,608 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 07:51:58,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:51:58,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:51:58,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 07:51:58,609 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:51:58,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:51:58,609 INFO L85 PathProgramCache]: Analyzing trace with hash 473755596, now seen corresponding path program 1 times [2023-01-28 07:51:58,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:51:58,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545677805] [2023-01-28 07:51:58,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:51:58,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:51:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:51:58,706 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 07:51:58,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:51:58,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545677805] [2023-01-28 07:51:58,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545677805] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:51:58,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257877673] [2023-01-28 07:51:58,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:51:58,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:51:58,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:51:58,708 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 07:51:58,723 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 07:51:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:51:58,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:51:58,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:51:58,823 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 07:51:58,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:51:58,836 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 07:51:58,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257877673] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:51:58,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:51:58,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:51:58,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351664346] [2023-01-28 07:51:58,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:51:58,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:51:58,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:51:58,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:51:58,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:51:58,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 184 [2023-01-28 07:51:58,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 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 07:51:58,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:51:58,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 184 [2023-01-28 07:51:58,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:51:58,895 INFO L130 PetriNetUnfolder]: 18/54 cut-off events. [2023-01-28 07:51:58,895 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-01-28 07:51:58,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 54 events. 18/54 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 80 event pairs, 8 based on Foata normal form. 10/64 useless extension candidates. Maximal degree in co-relation 118. Up to 38 conditions per place. [2023-01-28 07:51:58,896 INFO L137 encePairwiseOnDemand]: 181/184 looper letters, 0 selfloop transitions, 0 changer transitions 25/25 dead transitions. [2023-01-28 07:51:58,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 25 transitions, 105 flow [2023-01-28 07:51:58,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 07:51:58,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 07:51:58,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 348 transitions. [2023-01-28 07:51:58,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47282608695652173 [2023-01-28 07:51:58,898 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 348 transitions. [2023-01-28 07:51:58,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 348 transitions. [2023-01-28 07:51:58,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:51:58,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 348 transitions. [2023-01-28 07:51:58,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 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 07:51:58,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 184.0) internal successors, (920), 5 states have internal predecessors, (920), 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 07:51:58,901 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 184.0) internal successors, (920), 5 states have internal predecessors, (920), 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 07:51:58,901 INFO L175 Difference]: Start difference. First operand has 28 places, 18 transitions, 47 flow. Second operand 4 states and 348 transitions. [2023-01-28 07:51:58,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 25 transitions, 105 flow [2023-01-28 07:51:58,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 25 transitions, 99 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 07:51:58,902 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-01-28 07:51:58,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-01-28 07:51:58,902 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -4 predicate places. [2023-01-28 07:51:58,903 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-01-28 07:51:58,903 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 07:51:58,909 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:51:58,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-28 07:51:59,109 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 07:51:59,110 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:51:59,112 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:51:59,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 100 transitions, 205 flow [2023-01-28 07:51:59,121 INFO L130 PetriNetUnfolder]: 14/131 cut-off events. [2023-01-28 07:51:59,121 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:51:59,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 131 events. 14/131 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 289 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-01-28 07:51:59,122 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 100 transitions, 205 flow [2023-01-28 07:51:59,123 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 100 transitions, 205 flow [2023-01-28 07:51:59,123 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:51:59,123 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 100 transitions, 205 flow [2023-01-28 07:51:59,123 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 100 transitions, 205 flow [2023-01-28 07:51:59,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 100 transitions, 205 flow [2023-01-28 07:51:59,130 INFO L130 PetriNetUnfolder]: 14/131 cut-off events. [2023-01-28 07:51:59,130 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:51:59,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 131 events. 14/131 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 289 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-01-28 07:51:59,131 INFO L119 LiptonReduction]: Number of co-enabled transitions 2368 [2023-01-28 07:52:01,001 INFO L134 LiptonReduction]: Checked pairs total: 4463 [2023-01-28 07:52:01,001 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-01-28 07:52:01,003 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:52:01,003 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;@3c5d344b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:52:01,003 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:52:01,005 INFO L130 PetriNetUnfolder]: 2/19 cut-off events. [2023-01-28 07:52:01,005 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:52:01,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:52:01,006 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-28 07:52:01,006 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:52:01,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:52:01,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1138179058, now seen corresponding path program 1 times [2023-01-28 07:52:01,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:52:01,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909227876] [2023-01-28 07:52:01,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:52:01,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:52:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:52:01,036 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:52:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:52:01,052 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:52:01,053 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:52:01,053 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:52:01,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 07:52:01,053 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:52:01,054 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:52:01,054 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:52:01,054 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 07:52:01,067 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 07:52:01,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 133 transitions, 278 flow [2023-01-28 07:52:01,086 INFO L130 PetriNetUnfolder]: 24/200 cut-off events. [2023-01-28 07:52:01,086 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 07:52:01,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 200 events. 24/200 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 548 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 132. Up to 6 conditions per place. [2023-01-28 07:52:01,089 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 133 transitions, 278 flow [2023-01-28 07:52:01,091 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 133 transitions, 278 flow [2023-01-28 07:52:01,091 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:52:01,091 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 133 transitions, 278 flow [2023-01-28 07:52:01,091 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 133 transitions, 278 flow [2023-01-28 07:52:01,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 133 transitions, 278 flow [2023-01-28 07:52:01,104 INFO L130 PetriNetUnfolder]: 24/200 cut-off events. [2023-01-28 07:52:01,104 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 07:52:01,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 200 events. 24/200 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 548 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 132. Up to 6 conditions per place. [2023-01-28 07:52:01,108 INFO L119 LiptonReduction]: Number of co-enabled transitions 6848 [2023-01-28 07:52:03,092 INFO L134 LiptonReduction]: Checked pairs total: 13885 [2023-01-28 07:52:03,092 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-01-28 07:52:03,093 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:52:03,094 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;@3c5d344b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:52:03,094 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:52:03,095 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-28 07:52:03,095 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:52:03,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:52:03,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:52:03,096 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:52:03,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:52:03,096 INFO L85 PathProgramCache]: Analyzing trace with hash 22885775, now seen corresponding path program 1 times [2023-01-28 07:52:03,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:52:03,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430147637] [2023-01-28 07:52:03,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:52:03,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:52:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:52:03,123 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 07:52:03,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:52:03,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430147637] [2023-01-28 07:52:03,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430147637] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:52:03,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:52:03,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:52:03,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33954632] [2023-01-28 07:52:03,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:52:03,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:52:03,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:52:03,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:52:03,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:52:03,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 236 [2023-01-28 07:52:03,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 49 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 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 07:52:03,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:52:03,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 236 [2023-01-28 07:52:03,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:52:03,291 INFO L130 PetriNetUnfolder]: 1441/2596 cut-off events. [2023-01-28 07:52:03,291 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-01-28 07:52:03,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4995 conditions, 2596 events. 1441/2596 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 14982 event pairs, 640 based on Foata normal form. 360/2736 useless extension candidates. Maximal degree in co-relation 476. Up to 2332 conditions per place. [2023-01-28 07:52:03,299 INFO L137 encePairwiseOnDemand]: 219/236 looper letters, 34 selfloop transitions, 2 changer transitions 4/46 dead transitions. [2023-01-28 07:52:03,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 182 flow [2023-01-28 07:52:03,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:52:03,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:52:03,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-01-28 07:52:03,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538135593220339 [2023-01-28 07:52:03,301 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-01-28 07:52:03,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-01-28 07:52:03,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:52:03,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-01-28 07:52:03,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 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 07:52:03,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 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 07:52:03,307 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 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 07:52:03,307 INFO L175 Difference]: Start difference. First operand has 40 places, 49 transitions, 110 flow. Second operand 3 states and 381 transitions. [2023-01-28 07:52:03,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 182 flow [2023-01-28 07:52:03,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 180 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-01-28 07:52:03,309 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 82 flow [2023-01-28 07:52:03,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=43, PETRI_TRANSITIONS=32} [2023-01-28 07:52:03,310 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-01-28 07:52:03,310 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 82 flow [2023-01-28 07:52:03,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 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 07:52:03,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:52:03,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:52:03,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 07:52:03,312 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:52:03,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:52:03,312 INFO L85 PathProgramCache]: Analyzing trace with hash -785528523, now seen corresponding path program 1 times [2023-01-28 07:52:03,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:52:03,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505970432] [2023-01-28 07:52:03,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:52:03,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:52:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:52:03,368 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 07:52:03,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:52:03,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505970432] [2023-01-28 07:52:03,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505970432] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:52:03,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697693308] [2023-01-28 07:52:03,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:52:03,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:52:03,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:52:03,371 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 07:52:03,373 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 07:52:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:52:03,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:52:03,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:52:03,435 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 07:52:03,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:52:03,449 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 07:52:03,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697693308] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:52:03,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:52:03,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:52:03,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676602199] [2023-01-28 07:52:03,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:52:03,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:52:03,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:52:03,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:52:03,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:52:03,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 236 [2023-01-28 07:52:03,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 32 transitions, 82 flow. Second operand has 7 states, 7 states have (on average 109.28571428571429) internal successors, (765), 7 states have internal predecessors, (765), 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 07:52:03,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:52:03,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 236 [2023-01-28 07:52:03,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:52:03,538 INFO L130 PetriNetUnfolder]: 421/766 cut-off events. [2023-01-28 07:52:03,538 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-28 07:52:03,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1638 conditions, 766 events. 421/766 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3558 event pairs, 0 based on Foata normal form. 100/866 useless extension candidates. Maximal degree in co-relation 164. Up to 502 conditions per place. [2023-01-28 07:52:03,540 INFO L137 encePairwiseOnDemand]: 233/236 looper letters, 0 selfloop transitions, 0 changer transitions 57/57 dead transitions. [2023-01-28 07:52:03,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 57 transitions, 232 flow [2023-01-28 07:52:03,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 07:52:03,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 07:52:03,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 588 transitions. [2023-01-28 07:52:03,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49830508474576274 [2023-01-28 07:52:03,541 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 588 transitions. [2023-01-28 07:52:03,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 588 transitions. [2023-01-28 07:52:03,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:52:03,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 588 transitions. [2023-01-28 07:52:03,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.6) internal successors, (588), 5 states have internal predecessors, (588), 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 07:52:03,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 236.0) internal successors, (1416), 6 states have internal predecessors, (1416), 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 07:52:03,545 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 236.0) internal successors, (1416), 6 states have internal predecessors, (1416), 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 07:52:03,545 INFO L175 Difference]: Start difference. First operand has 43 places, 32 transitions, 82 flow. Second operand 5 states and 588 transitions. [2023-01-28 07:52:03,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 57 transitions, 232 flow [2023-01-28 07:52:03,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 57 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 07:52:03,546 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-01-28 07:52:03,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, 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 07:52:03,546 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -1 predicate places. [2023-01-28 07:52:03,546 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-01-28 07:52:03,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 109.28571428571429) internal successors, (765), 7 states have internal predecessors, (765), 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 07:52:03,547 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:52:03,553 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 07:52:03,751 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 07:52:03,751 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:52:03,752 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:52:03,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 133 transitions, 278 flow [2023-01-28 07:52:03,762 INFO L130 PetriNetUnfolder]: 24/200 cut-off events. [2023-01-28 07:52:03,762 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 07:52:03,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 200 events. 24/200 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 548 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 132. Up to 6 conditions per place. [2023-01-28 07:52:03,763 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 133 transitions, 278 flow [2023-01-28 07:52:03,764 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 133 transitions, 278 flow [2023-01-28 07:52:03,764 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:52:03,764 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 133 transitions, 278 flow [2023-01-28 07:52:03,764 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 133 transitions, 278 flow [2023-01-28 07:52:03,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 133 transitions, 278 flow [2023-01-28 07:52:03,790 INFO L130 PetriNetUnfolder]: 24/200 cut-off events. [2023-01-28 07:52:03,790 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 07:52:03,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 200 events. 24/200 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 548 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 132. Up to 6 conditions per place. [2023-01-28 07:52:03,793 INFO L119 LiptonReduction]: Number of co-enabled transitions 6848 [2023-01-28 07:52:05,760 INFO L134 LiptonReduction]: Checked pairs total: 14165 [2023-01-28 07:52:05,760 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-01-28 07:52:05,762 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:52:05,762 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;@3c5d344b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:52:05,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:52:05,766 INFO L130 PetriNetUnfolder]: 12/53 cut-off events. [2023-01-28 07:52:05,766 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 07:52:05,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:52:05,766 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-28 07:52:05,766 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:52:05,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:52:05,767 INFO L85 PathProgramCache]: Analyzing trace with hash -917069317, now seen corresponding path program 1 times [2023-01-28 07:52:05,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:52:05,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319794547] [2023-01-28 07:52:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:52:05,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:52:05,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:52:05,780 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:52:05,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:52:05,794 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:52:05,795 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:52:05,795 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:52:05,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 07:52:05,795 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:52:05,796 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:52:05,796 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:52:05,796 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 07:52:05,811 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 07:52:05,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 166 transitions, 353 flow [2023-01-28 07:52:05,828 INFO L130 PetriNetUnfolder]: 34/269 cut-off events. [2023-01-28 07:52:05,829 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 07:52:05,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 269 events. 34/269 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 808 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 204. Up to 8 conditions per place. [2023-01-28 07:52:05,830 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 166 transitions, 353 flow [2023-01-28 07:52:05,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 166 transitions, 353 flow [2023-01-28 07:52:05,831 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:52:05,831 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 166 transitions, 353 flow [2023-01-28 07:52:05,832 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 166 transitions, 353 flow [2023-01-28 07:52:05,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 166 transitions, 353 flow [2023-01-28 07:52:05,846 INFO L130 PetriNetUnfolder]: 34/269 cut-off events. [2023-01-28 07:52:05,846 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 07:52:05,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 269 events. 34/269 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 808 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 204. Up to 8 conditions per place. [2023-01-28 07:52:05,852 INFO L119 LiptonReduction]: Number of co-enabled transitions 13440 [2023-01-28 07:52:07,849 INFO L134 LiptonReduction]: Checked pairs total: 28591 [2023-01-28 07:52:07,849 INFO L136 LiptonReduction]: Total number of compositions: 122 [2023-01-28 07:52:07,851 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:52:07,852 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;@3c5d344b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:52:07,853 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:52:07,854 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-28 07:52:07,854 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:52:07,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:52:07,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:52:07,854 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:52:07,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:52:07,854 INFO L85 PathProgramCache]: Analyzing trace with hash 35967420, now seen corresponding path program 1 times [2023-01-28 07:52:07,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:52:07,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710872649] [2023-01-28 07:52:07,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:52:07,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:52:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:52:07,876 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 07:52:07,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:52:07,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710872649] [2023-01-28 07:52:07,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710872649] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:52:07,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:52:07,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:52:07,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207675651] [2023-01-28 07:52:07,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:52:07,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:52:07,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:52:07,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:52:07,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:52:07,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 288 [2023-01-28 07:52:07,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 67 transitions, 155 flow. Second operand has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 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 07:52:07,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:52:07,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 288 [2023-01-28 07:52:07,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:52:09,679 INFO L130 PetriNetUnfolder]: 20233/30021 cut-off events. [2023-01-28 07:52:09,679 INFO L131 PetriNetUnfolder]: For 597/597 co-relation queries the response was YES. [2023-01-28 07:52:09,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58876 conditions, 30021 events. 20233/30021 cut-off events. For 597/597 co-relation queries the response was YES. Maximal size of possible extension queue 816. Compared 197914 event pairs, 19318 based on Foata normal form. 5058/33014 useless extension candidates. Maximal degree in co-relation 22879. Up to 28406 conditions per place. [2023-01-28 07:52:09,782 INFO L137 encePairwiseOnDemand]: 265/288 looper letters, 42 selfloop transitions, 2 changer transitions 4/57 dead transitions. [2023-01-28 07:52:09,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 57 transitions, 229 flow [2023-01-28 07:52:09,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:52:09,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:52:09,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-01-28 07:52:09,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474537037037037 [2023-01-28 07:52:09,784 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-01-28 07:52:09,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-01-28 07:52:09,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:52:09,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-01-28 07:52:09,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 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 07:52:09,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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 07:52:09,788 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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 07:52:09,789 INFO L175 Difference]: Start difference. First operand has 54 places, 67 transitions, 155 flow. Second operand 3 states and 473 transitions. [2023-01-28 07:52:09,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 57 transitions, 229 flow [2023-01-28 07:52:09,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 57 transitions, 223 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-01-28 07:52:09,791 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 111 flow [2023-01-28 07:52:09,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2023-01-28 07:52:09,792 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2023-01-28 07:52:09,792 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 111 flow [2023-01-28 07:52:09,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 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 07:52:09,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:52:09,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:52:09,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 07:52:09,793 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:52:09,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:52:09,793 INFO L85 PathProgramCache]: Analyzing trace with hash -2016521029, now seen corresponding path program 1 times [2023-01-28 07:52:09,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:52:09,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159050384] [2023-01-28 07:52:09,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:52:09,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:52:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:52:09,830 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 07:52:09,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:52:09,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159050384] [2023-01-28 07:52:09,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159050384] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:52:09,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339793087] [2023-01-28 07:52:09,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:52:09,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:52:09,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:52:09,832 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 07:52:09,834 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 07:52:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:52:09,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:52:09,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:52:09,903 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 07:52:09,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:52:09,917 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 07:52:09,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339793087] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:52:09,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:52:09,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:52:09,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919008059] [2023-01-28 07:52:09,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:52:09,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:52:09,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:52:09,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:52:09,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:52:09,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 288 [2023-01-28 07:52:09,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 111 flow. Second operand has 7 states, 7 states have (on average 135.28571428571428) internal successors, (947), 7 states have internal predecessors, (947), 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 07:52:09,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:52:09,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 288 [2023-01-28 07:52:09,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:52:10,485 INFO L130 PetriNetUnfolder]: 6205/9325 cut-off events. [2023-01-28 07:52:10,485 INFO L131 PetriNetUnfolder]: For 1008/1008 co-relation queries the response was YES. [2023-01-28 07:52:10,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19484 conditions, 9325 events. 6205/9325 cut-off events. For 1008/1008 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 55004 event pairs, 0 based on Foata normal form. 909/10233 useless extension candidates. Maximal degree in co-relation 2226. Up to 5958 conditions per place. [2023-01-28 07:52:10,496 INFO L137 encePairwiseOnDemand]: 285/288 looper letters, 0 selfloop transitions, 0 changer transitions 95/95 dead transitions. [2023-01-28 07:52:10,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 95 transitions, 385 flow [2023-01-28 07:52:10,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 07:52:10,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 07:52:10,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 887 transitions. [2023-01-28 07:52:10,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5133101851851852 [2023-01-28 07:52:10,499 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 887 transitions. [2023-01-28 07:52:10,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 887 transitions. [2023-01-28 07:52:10,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:52:10,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 887 transitions. [2023-01-28 07:52:10,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 147.83333333333334) internal successors, (887), 6 states have internal predecessors, (887), 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 07:52:10,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 288.0) internal successors, (2016), 7 states have internal predecessors, (2016), 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 07:52:10,502 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 288.0) internal successors, (2016), 7 states have internal predecessors, (2016), 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 07:52:10,502 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 111 flow. Second operand 6 states and 887 transitions. [2023-01-28 07:52:10,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 95 transitions, 385 flow [2023-01-28 07:52:10,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 95 transitions, 383 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 07:52:10,503 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2023-01-28 07:52:10,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, 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 07:52:10,504 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2023-01-28 07:52:10,504 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2023-01-28 07:52:10,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 135.28571428571428) internal successors, (947), 7 states have internal predecessors, (947), 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 07:52:10,504 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:52:10,508 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 07:52:10,708 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 07:52:10,709 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:52:10,709 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:52:10,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 166 transitions, 353 flow [2023-01-28 07:52:10,722 INFO L130 PetriNetUnfolder]: 34/269 cut-off events. [2023-01-28 07:52:10,723 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 07:52:10,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 269 events. 34/269 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 808 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 204. Up to 8 conditions per place. [2023-01-28 07:52:10,724 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 166 transitions, 353 flow [2023-01-28 07:52:10,725 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 166 transitions, 353 flow [2023-01-28 07:52:10,725 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:52:10,725 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 166 transitions, 353 flow [2023-01-28 07:52:10,725 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 166 transitions, 353 flow [2023-01-28 07:52:10,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 166 transitions, 353 flow [2023-01-28 07:52:10,737 INFO L130 PetriNetUnfolder]: 34/269 cut-off events. [2023-01-28 07:52:10,737 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 07:52:10,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 269 events. 34/269 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 808 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 204. Up to 8 conditions per place. [2023-01-28 07:52:10,744 INFO L119 LiptonReduction]: Number of co-enabled transitions 13440 [2023-01-28 07:52:12,679 INFO L134 LiptonReduction]: Checked pairs total: 28991 [2023-01-28 07:52:12,679 INFO L136 LiptonReduction]: Total number of compositions: 122 [2023-01-28 07:52:12,680 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:52:12,680 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;@3c5d344b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:52:12,680 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:52:12,683 INFO L130 PetriNetUnfolder]: 18/78 cut-off events. [2023-01-28 07:52:12,683 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 07:52:12,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:52:12,684 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-28 07:52:12,684 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:52:12,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:52:12,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1874901588, now seen corresponding path program 1 times [2023-01-28 07:52:12,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:52:12,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140763715] [2023-01-28 07:52:12,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:52:12,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:52:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:52:12,693 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:52:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:52:12,701 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:52:12,702 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:52:12,702 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:52:12,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 07:52:12,702 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:52:12,702 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:52:12,702 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:52:12,702 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-28 07:52:12,717 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 07:52:12,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 199 transitions, 430 flow [2023-01-28 07:52:12,740 INFO L130 PetriNetUnfolder]: 44/338 cut-off events. [2023-01-28 07:52:12,741 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 07:52:12,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 338 events. 44/338 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1072 event pairs, 0 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 277. Up to 10 conditions per place. [2023-01-28 07:52:12,742 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 199 transitions, 430 flow [2023-01-28 07:52:12,743 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 199 transitions, 430 flow [2023-01-28 07:52:12,743 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:52:12,743 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 199 transitions, 430 flow [2023-01-28 07:52:12,744 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 199 transitions, 430 flow [2023-01-28 07:52:12,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 199 transitions, 430 flow [2023-01-28 07:52:12,763 INFO L130 PetriNetUnfolder]: 44/338 cut-off events. [2023-01-28 07:52:12,763 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 07:52:12,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 338 events. 44/338 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1072 event pairs, 0 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 277. Up to 10 conditions per place. [2023-01-28 07:52:12,769 INFO L119 LiptonReduction]: Number of co-enabled transitions 22144 [2023-01-28 07:52:14,979 INFO L134 LiptonReduction]: Checked pairs total: 51187 [2023-01-28 07:52:14,979 INFO L136 LiptonReduction]: Total number of compositions: 143 [2023-01-28 07:52:14,980 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:52:14,980 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;@3c5d344b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:52:14,980 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:52:14,981 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-28 07:52:14,981 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:52:14,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:52:14,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:52:14,981 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:52:14,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:52:14,982 INFO L85 PathProgramCache]: Analyzing trace with hash 51269740, now seen corresponding path program 1 times [2023-01-28 07:52:14,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:52:14,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890259736] [2023-01-28 07:52:14,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:52:14,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:52:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:52:15,014 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 07:52:15,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:52:15,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890259736] [2023-01-28 07:52:15,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890259736] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:52:15,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:52:15,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:52:15,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794800233] [2023-01-28 07:52:15,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:52:15,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:52:15,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:52:15,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:52:15,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:52:15,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 342 [2023-01-28 07:52:15,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 85 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 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 07:52:15,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:52:15,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 342 [2023-01-28 07:52:15,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:52:46,512 INFO L130 PetriNetUnfolder]: 452675/587953 cut-off events. [2023-01-28 07:52:46,512 INFO L131 PetriNetUnfolder]: For 13849/13849 co-relation queries the response was YES. [2023-01-28 07:52:47,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1179674 conditions, 587953 events. 452675/587953 cut-off events. For 13849/13849 co-relation queries the response was YES. Maximal size of possible extension queue 10220. Compared 3861022 event pairs, 439492 based on Foata normal form. 61092/618591 useless extension candidates. Maximal degree in co-relation 94284. Up to 584426 conditions per place. [2023-01-28 07:52:48,429 INFO L137 encePairwiseOnDemand]: 313/342 looper letters, 58 selfloop transitions, 2 changer transitions 4/70 dead transitions. [2023-01-28 07:52:48,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 298 flow [2023-01-28 07:52:48,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:52:48,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:52:48,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 573 transitions. [2023-01-28 07:52:48,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584795321637427 [2023-01-28 07:52:48,431 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 573 transitions. [2023-01-28 07:52:48,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 573 transitions. [2023-01-28 07:52:48,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:52:48,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 573 transitions. [2023-01-28 07:52:48,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 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 07:52:48,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 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 07:52:48,434 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 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 07:52:48,434 INFO L175 Difference]: Start difference. First operand has 68 places, 85 transitions, 202 flow. Second operand 3 states and 573 transitions. [2023-01-28 07:52:48,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 298 flow [2023-01-28 07:52:48,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 286 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-01-28 07:52:48,443 INFO L231 Difference]: Finished difference. Result has 71 places, 56 transitions, 140 flow [2023-01-28 07:52:48,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=71, PETRI_TRANSITIONS=56} [2023-01-28 07:52:48,444 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-01-28 07:52:48,444 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 56 transitions, 140 flow [2023-01-28 07:52:48,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 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 07:52:48,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:52:48,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:52:48,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 07:52:48,444 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:52:48,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:52:48,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1320404317, now seen corresponding path program 1 times [2023-01-28 07:52:48,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:52:48,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497443342] [2023-01-28 07:52:48,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:52:48,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:52:48,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:52:48,465 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 07:52:48,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:52:48,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497443342] [2023-01-28 07:52:48,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497443342] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:52:48,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442877400] [2023-01-28 07:52:48,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:52:48,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:52:48,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:52:48,466 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 07:52:48,468 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 07:52:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:52:48,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:52:48,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:52:48,539 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 07:52:48,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:52:48,557 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 07:52:48,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442877400] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:52:48,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:52:48,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:52:48,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961622915] [2023-01-28 07:52:48,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:52:48,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:52:48,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:52:48,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:52:48,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:52:48,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 342 [2023-01-28 07:52:48,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 56 transitions, 140 flow. Second operand has 7 states, 7 states have (on average 161.28571428571428) internal successors, (1129), 7 states have internal predecessors, (1129), 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 07:52:48,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:52:48,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 342 [2023-01-28 07:52:48,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:53:06,620 INFO L130 PetriNetUnfolder]: 286856/374581 cut-off events. [2023-01-28 07:53:06,621 INFO L131 PetriNetUnfolder]: For 15970/15970 co-relation queries the response was YES. [2023-01-28 07:53:07,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 777250 conditions, 374581 events. 286856/374581 cut-off events. For 15970/15970 co-relation queries the response was YES. Maximal size of possible extension queue 6946. Compared 2471395 event pairs, 12100 based on Foata normal form. 1330/375910 useless extension candidates. Maximal degree in co-relation 79396. Up to 246357 conditions per place. [2023-01-28 07:53:08,152 INFO L137 encePairwiseOnDemand]: 338/342 looper letters, 146 selfloop transitions, 5 changer transitions 1/158 dead transitions. [2023-01-28 07:53:08,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 158 transitions, 652 flow [2023-01-28 07:53:08,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 07:53:08,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 07:53:08,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1109 transitions. [2023-01-28 07:53:08,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404483430799221 [2023-01-28 07:53:08,155 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1109 transitions. [2023-01-28 07:53:08,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1109 transitions. [2023-01-28 07:53:08,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:53:08,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1109 transitions. [2023-01-28 07:53:08,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 184.83333333333334) internal successors, (1109), 6 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:08,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 342.0) internal successors, (2394), 7 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:08,159 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 342.0) internal successors, (2394), 7 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:08,159 INFO L175 Difference]: Start difference. First operand has 71 places, 56 transitions, 140 flow. Second operand 6 states and 1109 transitions. [2023-01-28 07:53:08,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 158 transitions, 652 flow [2023-01-28 07:53:08,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 158 transitions, 650 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 07:53:08,163 INFO L231 Difference]: Finished difference. Result has 75 places, 58 transitions, 172 flow [2023-01-28 07:53:08,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2023-01-28 07:53:08,164 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 7 predicate places. [2023-01-28 07:53:08,164 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 172 flow [2023-01-28 07:53:08,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 161.28571428571428) internal successors, (1129), 7 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:08,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:53:08,164 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:53:08,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 07:53:08,368 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 07:53:08,369 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:53:08,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:53:08,369 INFO L85 PathProgramCache]: Analyzing trace with hash -786360598, now seen corresponding path program 1 times [2023-01-28 07:53:08,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:53:08,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523526974] [2023-01-28 07:53:08,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:08,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:53:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:08,420 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 07:53:08,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:53:08,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523526974] [2023-01-28 07:53:08,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523526974] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:53:08,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292193185] [2023-01-28 07:53:08,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:08,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:53:08,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:53:08,421 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 07:53:08,423 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 07:53:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:08,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 07:53:08,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:53:08,521 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 07:53:08,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:53:08,582 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 07:53:08,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292193185] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:53:08,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:53:08,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 07:53:08,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866468253] [2023-01-28 07:53:08,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:53:08,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 07:53:08,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:53:08,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 07:53:08,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-28 07:53:08,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 342 [2023-01-28 07:53:08,588 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 172 flow. Second operand has 13 states, 13 states have (on average 161.6153846153846) internal successors, (2101), 13 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:08,588 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:53:08,588 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 342 [2023-01-28 07:53:08,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:53:15,196 INFO L130 PetriNetUnfolder]: 93740/127015 cut-off events. [2023-01-28 07:53:15,196 INFO L131 PetriNetUnfolder]: For 102480/102480 co-relation queries the response was YES. [2023-01-28 07:53:15,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300614 conditions, 127015 events. 93740/127015 cut-off events. For 102480/102480 co-relation queries the response was YES. Maximal size of possible extension queue 2778. Compared 805898 event pairs, 0 based on Foata normal form. 13310/140324 useless extension candidates. Maximal degree in co-relation 32467. Up to 61589 conditions per place. [2023-01-28 07:53:15,687 INFO L137 encePairwiseOnDemand]: 339/342 looper letters, 0 selfloop transitions, 0 changer transitions 154/154 dead transitions. [2023-01-28 07:53:15,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 154 transitions, 658 flow [2023-01-28 07:53:15,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 07:53:15,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 07:53:15,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1262 transitions. [2023-01-28 07:53:15,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5271512113617377 [2023-01-28 07:53:15,691 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1262 transitions. [2023-01-28 07:53:15,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1262 transitions. [2023-01-28 07:53:15,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:53:15,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1262 transitions. [2023-01-28 07:53:15,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 180.28571428571428) internal successors, (1262), 7 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:15,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 342.0) internal successors, (2736), 8 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:15,697 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 342.0) internal successors, (2736), 8 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:15,697 INFO L175 Difference]: Start difference. First operand has 75 places, 58 transitions, 172 flow. Second operand 7 states and 1262 transitions. [2023-01-28 07:53:15,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 154 transitions, 658 flow [2023-01-28 07:53:15,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 154 transitions, 639 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-01-28 07:53:15,975 INFO L231 Difference]: Finished difference. Result has 71 places, 0 transitions, 0 flow [2023-01-28 07:53:15,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=71, PETRI_TRANSITIONS=0} [2023-01-28 07:53:15,976 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-01-28 07:53:15,976 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 0 transitions, 0 flow [2023-01-28 07:53:15,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 161.6153846153846) internal successors, (2101), 13 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:15,976 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:53:15,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-01-28 07:53:16,180 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,SelfDestructingSolverStorable11 [2023-01-28 07:53:16,180 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-28 07:53:16,181 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:53:16,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 199 transitions, 430 flow [2023-01-28 07:53:16,200 INFO L130 PetriNetUnfolder]: 44/338 cut-off events. [2023-01-28 07:53:16,200 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 07:53:16,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 338 events. 44/338 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1072 event pairs, 0 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 277. Up to 10 conditions per place. [2023-01-28 07:53:16,201 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 199 transitions, 430 flow [2023-01-28 07:53:16,202 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 199 transitions, 430 flow [2023-01-28 07:53:16,202 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:53:16,202 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 199 transitions, 430 flow [2023-01-28 07:53:16,203 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 199 transitions, 430 flow [2023-01-28 07:53:16,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 199 transitions, 430 flow [2023-01-28 07:53:16,220 INFO L130 PetriNetUnfolder]: 44/338 cut-off events. [2023-01-28 07:53:16,221 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 07:53:16,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 338 events. 44/338 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1072 event pairs, 0 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 277. Up to 10 conditions per place. [2023-01-28 07:53:16,226 INFO L119 LiptonReduction]: Number of co-enabled transitions 22144 [2023-01-28 07:53:18,414 INFO L134 LiptonReduction]: Checked pairs total: 50733 [2023-01-28 07:53:18,414 INFO L136 LiptonReduction]: Total number of compositions: 143 [2023-01-28 07:53:18,415 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:53:18,415 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;@3c5d344b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:53:18,415 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:53:18,420 INFO L130 PetriNetUnfolder]: 28/111 cut-off events. [2023-01-28 07:53:18,420 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 07:53:18,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:53:18,421 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-28 07:53:18,421 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:53:18,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:53:18,421 INFO L85 PathProgramCache]: Analyzing trace with hash 426897620, now seen corresponding path program 1 times [2023-01-28 07:53:18,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:53:18,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046837836] [2023-01-28 07:53:18,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:18,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:53:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:53:18,430 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:53:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:53:18,439 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:53:18,439 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:53:18,439 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:53:18,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-28 07:53:18,440 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:53:18,440 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:53:18,440 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:53:18,440 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-28 07:53:18,452 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 07:53:18,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 232 transitions, 509 flow [2023-01-28 07:53:18,480 INFO L130 PetriNetUnfolder]: 54/407 cut-off events. [2023-01-28 07:53:18,480 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-28 07:53:18,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 407 events. 54/407 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1325 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 351. Up to 12 conditions per place. [2023-01-28 07:53:18,483 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 232 transitions, 509 flow [2023-01-28 07:53:18,484 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 232 transitions, 509 flow [2023-01-28 07:53:18,485 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:53:18,485 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 232 transitions, 509 flow [2023-01-28 07:53:18,485 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 232 transitions, 509 flow [2023-01-28 07:53:18,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 232 transitions, 509 flow [2023-01-28 07:53:18,511 INFO L130 PetriNetUnfolder]: 54/407 cut-off events. [2023-01-28 07:53:18,511 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-28 07:53:18,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 407 events. 54/407 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1325 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 351. Up to 12 conditions per place. [2023-01-28 07:53:18,520 INFO L119 LiptonReduction]: Number of co-enabled transitions 32960 [2023-01-28 07:53:20,767 INFO L134 LiptonReduction]: Checked pairs total: 74580 [2023-01-28 07:53:20,767 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-01-28 07:53:20,768 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:53:20,768 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;@3c5d344b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:53:20,768 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:53:20,769 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-28 07:53:20,769 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:53:20,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:53:20,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:53:20,769 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:53:20,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:53:20,770 INFO L85 PathProgramCache]: Analyzing trace with hash 68810911, now seen corresponding path program 1 times [2023-01-28 07:53:20,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:53:20,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026078328] [2023-01-28 07:53:20,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:20,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:53:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:20,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:20,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:53:20,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026078328] [2023-01-28 07:53:20,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026078328] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:53:20,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:53:20,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:53:20,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533140010] [2023-01-28 07:53:20,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:53:20,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:53:20,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:53:20,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:53:20,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:53:20,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 394 [2023-01-28 07:53:20,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 103 transitions, 251 flow. Second operand has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:20,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:53:20,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 394 [2023-01-28 07:53:20,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand