/usr/bin/java -Xmx8000000000 -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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 22:23:03,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 22:23:03,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 22:23:03,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 22:23:03,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 22:23:03,581 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 22:23:03,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 22:23:03,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 22:23:03,590 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 22:23:03,595 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 22:23:03,596 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 22:23:03,597 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 22:23:03,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 22:23:03,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 22:23:03,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 22:23:03,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 22:23:03,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 22:23:03,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 22:23:03,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 22:23:03,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 22:23:03,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 22:23:03,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 22:23:03,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 22:23:03,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 22:23:03,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-12-05 22:23:03,624 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 22:23:03,629 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 22:23:03,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 22:23:03,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 22:23:03,630 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 22:23:03,631 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 22:23:03,631 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 22:23:03,631 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 22:23:03,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 22:23:03,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 22:23:03,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 22:23:03,635 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-SemanticLbe.epf [2022-12-05 22:23:03,662 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 22:23:03,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 22:23:03,663 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 22:23:03,663 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 22:23:03,664 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 22:23:03,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 22:23:03,664 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 22:23:03,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 22:23:03,665 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 22:23:03,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 22:23:03,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 22:23:03,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 22:23:03,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 22:23:03,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 22:23:03,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 22:23:03,666 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 22:23:03,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 22:23:03,666 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 22:23:03,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 22:23:03,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 22:23:03,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 22:23:03,666 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 22:23:03,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 22:23:03,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 22:23:03,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 22:23:03,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 22:23:03,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 22:23:03,667 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 22:23:03,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 22:23:03,667 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 22:23:03,667 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 22:23:03,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 22:23:03,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 22:23:03,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 22:23:03,957 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 22:23:03,957 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 22:23:03,958 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i [2022-12-05 22:23:04,857 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 22:23:05,054 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 22:23:05,054 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i [2022-12-05 22:23:05,071 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98c0b6152/78ed6b0391b24e0ab8a0eab1266fe39d/FLAG86a745ffd [2022-12-05 22:23:05,105 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98c0b6152/78ed6b0391b24e0ab8a0eab1266fe39d [2022-12-05 22:23:05,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 22:23:05,108 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 22:23:05,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 22:23:05,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 22:23:05,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 22:23:05,111 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 10:23:05" (1/1) ... [2022-12-05 22:23:05,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@de8ac26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:23:05, skipping insertion in model container [2022-12-05 22:23:05,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 10:23:05" (1/1) ... [2022-12-05 22:23:05,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 22:23:05,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 22:23:05,465 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i[39757,39770] [2022-12-05 22:23:05,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 22:23:05,486 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 22:23:05,530 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i[39757,39770] [2022-12-05 22:23:05,533 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 22:23:05,583 INFO L208 MainTranslator]: Completed translation [2022-12-05 22:23:05,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:23:05 WrapperNode [2022-12-05 22:23:05,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 22:23:05,585 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 22:23:05,585 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 22:23:05,585 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 22:23:05,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:23:05" (1/1) ... [2022-12-05 22:23:05,615 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:23:05" (1/1) ... [2022-12-05 22:23:05,663 INFO L138 Inliner]: procedures = 243, calls = 50, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 81 [2022-12-05 22:23:05,663 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 22:23:05,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 22:23:05,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 22:23:05,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 22:23:05,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:23:05" (1/1) ... [2022-12-05 22:23:05,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:23:05" (1/1) ... [2022-12-05 22:23:05,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:23:05" (1/1) ... [2022-12-05 22:23:05,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:23:05" (1/1) ... [2022-12-05 22:23:05,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:23:05" (1/1) ... [2022-12-05 22:23:05,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:23:05" (1/1) ... [2022-12-05 22:23:05,680 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:23:05" (1/1) ... [2022-12-05 22:23:05,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:23:05" (1/1) ... [2022-12-05 22:23:05,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 22:23:05,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 22:23:05,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 22:23:05,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 22:23:05,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:23:05" (1/1) ... [2022-12-05 22:23:05,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 22:23:05,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:23:05,709 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) [2022-12-05 22:23:05,743 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 [2022-12-05 22:23:05,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 22:23:05,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 22:23:05,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-05 22:23:05,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 22:23:05,764 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-05 22:23:05,764 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-05 22:23:05,764 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-05 22:23:05,764 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-05 22:23:05,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 22:23:05,764 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-05 22:23:05,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 22:23:05,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 22:23:05,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 22:23:05,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 22:23:05,767 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-05 22:23:05,964 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 22:23:05,965 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 22:23:06,163 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 22:23:06,168 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 22:23:06,169 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-05 22:23:06,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 10:23:06 BoogieIcfgContainer [2022-12-05 22:23:06,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 22:23:06,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 22:23:06,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 22:23:06,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 22:23:06,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 10:23:05" (1/3) ... [2022-12-05 22:23:06,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@531e2961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 10:23:06, skipping insertion in model container [2022-12-05 22:23:06,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:23:05" (2/3) ... [2022-12-05 22:23:06,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@531e2961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 10:23:06, skipping insertion in model container [2022-12-05 22:23:06,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 10:23:06" (3/3) ... [2022-12-05 22:23:06,176 INFO L112 eAbstractionObserver]: Analyzing ICFG arithmetic_prog_ok.i [2022-12-05 22:23:06,188 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 22:23:06,188 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 22:23:06,188 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 22:23:06,243 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-05 22:23:06,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 131 transitions, 278 flow [2022-12-05 22:23:06,301 INFO L130 PetriNetUnfolder]: 10/129 cut-off events. [2022-12-05 22:23:06,302 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 22:23:06,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 129 events. 10/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 140 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 82. Up to 3 conditions per place. [2022-12-05 22:23:06,306 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 131 transitions, 278 flow [2022-12-05 22:23:06,309 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 118 transitions, 248 flow [2022-12-05 22:23:06,311 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:23:06,324 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 118 transitions, 248 flow [2022-12-05 22:23:06,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 118 transitions, 248 flow [2022-12-05 22:23:06,348 INFO L130 PetriNetUnfolder]: 8/118 cut-off events. [2022-12-05 22:23:06,348 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 22:23:06,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 118 events. 8/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 129 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2022-12-05 22:23:06,351 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 118 transitions, 248 flow [2022-12-05 22:23:06,351 INFO L188 LiptonReduction]: Number of co-enabled transitions 1922 [2022-12-05 22:23:06,502 INFO L167 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:23:06,504 INFO L172 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2022-12-05 22:23:06,506 INFO L167 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:23:06,508 INFO L172 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2022-12-05 22:23:08,704 INFO L167 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:23:08,705 INFO L172 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2022-12-05 22:23:08,706 INFO L167 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:23:08,707 INFO L172 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2022-12-05 22:23:08,879 INFO L167 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:23:08,881 INFO L172 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2022-12-05 22:23:08,882 INFO L167 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:23:08,883 INFO L172 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2022-12-05 22:23:09,403 INFO L167 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:23:09,404 INFO L172 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2022-12-05 22:23:09,413 INFO L167 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:23:09,414 INFO L172 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2022-12-05 22:23:09,670 INFO L167 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:23:09,671 INFO L172 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2022-12-05 22:23:09,675 INFO L167 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:23:09,676 INFO L172 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2022-12-05 22:23:10,041 INFO L167 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:23:10,041 INFO L172 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2022-12-05 22:23:10,046 INFO L167 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:23:10,046 INFO L172 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2022-12-05 22:23:11,961 INFO L167 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:23:11,961 INFO L172 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2022-12-05 22:23:11,965 INFO L167 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:23:11,965 INFO L172 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2022-12-05 22:23:13,013 INFO L203 LiptonReduction]: Total number of compositions: 93 [2022-12-05 22:23:13,023 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 22:23:13,027 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;@4a9e2e08, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 22:23:13,027 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-05 22:23:13,032 INFO L130 PetriNetUnfolder]: 6/30 cut-off events. [2022-12-05 22:23:13,032 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 22:23:13,032 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:23:13,033 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:23:13,033 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:23:13,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:23:13,036 INFO L85 PathProgramCache]: Analyzing trace with hash 228985984, now seen corresponding path program 1 times [2022-12-05 22:23:13,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:23:13,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747693982] [2022-12-05 22:23:13,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:23:13,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:23:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:23:13,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:23:13,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:23:13,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747693982] [2022-12-05 22:23:13,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747693982] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:23:13,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:23:13,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 22:23:13,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837217474] [2022-12-05 22:23:13,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:23:13,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 22:23:13,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:23:13,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 22:23:13,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 22:23:13,321 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2022-12-05 22:23:13,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 31 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2022-12-05 22:23:13,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:23:13,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2022-12-05 22:23:13,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:23:13,429 INFO L130 PetriNetUnfolder]: 189/410 cut-off events. [2022-12-05 22:23:13,429 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-12-05 22:23:13,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 736 conditions, 410 events. 189/410 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1851 event pairs, 72 based on Foata normal form. 24/368 useless extension candidates. Maximal degree in co-relation 672. Up to 194 conditions per place. [2022-12-05 22:23:13,433 INFO L137 encePairwiseOnDemand]: 26/31 looper letters, 32 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2022-12-05 22:23:13,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 42 transitions, 167 flow [2022-12-05 22:23:13,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 22:23:13,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 22:23:13,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2022-12-05 22:23:13,441 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6774193548387096 [2022-12-05 22:23:13,442 INFO L175 Difference]: Start difference. First operand has 32 places, 31 transitions, 74 flow. Second operand 3 states and 63 transitions. [2022-12-05 22:23:13,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 42 transitions, 167 flow [2022-12-05 22:23:13,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 42 transitions, 157 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-05 22:23:13,446 INFO L231 Difference]: Finished difference. Result has 31 places, 30 transitions, 74 flow [2022-12-05 22:23:13,447 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=31, PETRI_TRANSITIONS=30} [2022-12-05 22:23:13,449 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2022-12-05 22:23:13,449 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 30 transitions, 74 flow [2022-12-05 22:23:13,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2022-12-05 22:23:13,450 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:23:13,450 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:23:13,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 22:23:13,450 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:23:13,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:23:13,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1986141756, now seen corresponding path program 1 times [2022-12-05 22:23:13,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:23:13,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522874852] [2022-12-05 22:23:13,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:23:13,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:23:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:23:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:23:13,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:23:13,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522874852] [2022-12-05 22:23:13,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522874852] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:23:13,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:23:13,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 22:23:13,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064955565] [2022-12-05 22:23:13,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:23:13,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 22:23:13,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:23:13,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 22:23:13,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 22:23:13,543 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2022-12-05 22:23:13,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2022-12-05 22:23:13,543 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:23:13,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2022-12-05 22:23:13,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:23:13,615 INFO L130 PetriNetUnfolder]: 297/632 cut-off events. [2022-12-05 22:23:13,615 INFO L131 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2022-12-05 22:23:13,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1195 conditions, 632 events. 297/632 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3028 event pairs, 117 based on Foata normal form. 0/585 useless extension candidates. Maximal degree in co-relation 384. Up to 299 conditions per place. [2022-12-05 22:23:13,619 INFO L137 encePairwiseOnDemand]: 28/31 looper letters, 34 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2022-12-05 22:23:13,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 44 transitions, 185 flow [2022-12-05 22:23:13,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 22:23:13,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 22:23:13,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2022-12-05 22:23:13,621 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6344086021505376 [2022-12-05 22:23:13,621 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 74 flow. Second operand 3 states and 59 transitions. [2022-12-05 22:23:13,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 44 transitions, 185 flow [2022-12-05 22:23:13,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 44 transitions, 181 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 22:23:13,622 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 84 flow [2022-12-05 22:23:13,622 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2022-12-05 22:23:13,623 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2022-12-05 22:23:13,623 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 84 flow [2022-12-05 22:23:13,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2022-12-05 22:23:13,623 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:23:13,623 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:23:13,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 22:23:13,623 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:23:13,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:23:13,624 INFO L85 PathProgramCache]: Analyzing trace with hash 311444521, now seen corresponding path program 1 times [2022-12-05 22:23:13,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:23:13,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319691551] [2022-12-05 22:23:13,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:23:13,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:23:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:23:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:23:13,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:23:13,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319691551] [2022-12-05 22:23:13,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319691551] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:23:13,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:23:13,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 22:23:13,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350090207] [2022-12-05 22:23:13,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:23:13,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 22:23:13,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:23:13,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 22:23:13,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 22:23:13,759 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2022-12-05 22:23:13,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2022-12-05 22:23:13,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:23:13,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2022-12-05 22:23:13,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:23:13,840 INFO L130 PetriNetUnfolder]: 285/664 cut-off events. [2022-12-05 22:23:13,840 INFO L131 PetriNetUnfolder]: For 147/147 co-relation queries the response was YES. [2022-12-05 22:23:13,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1334 conditions, 664 events. 285/664 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3321 event pairs, 105 based on Foata normal form. 64/700 useless extension candidates. Maximal degree in co-relation 397. Up to 264 conditions per place. [2022-12-05 22:23:13,843 INFO L137 encePairwiseOnDemand]: 23/31 looper letters, 24 selfloop transitions, 10 changer transitions 0/40 dead transitions. [2022-12-05 22:23:13,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 181 flow [2022-12-05 22:23:13,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 22:23:13,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 22:23:13,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2022-12-05 22:23:13,844 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2022-12-05 22:23:13,845 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 84 flow. Second operand 3 states and 54 transitions. [2022-12-05 22:23:13,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 181 flow [2022-12-05 22:23:13,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 22:23:13,847 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 102 flow [2022-12-05 22:23:13,848 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2022-12-05 22:23:13,848 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2022-12-05 22:23:13,849 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 102 flow [2022-12-05 22:23:13,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2022-12-05 22:23:13,849 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:23:13,849 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:23:13,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-05 22:23:13,849 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:23:13,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:23:13,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1212978579, now seen corresponding path program 2 times [2022-12-05 22:23:13,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:23:13,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263643561] [2022-12-05 22:23:13,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:23:13,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:23:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:23:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:23:13,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:23:13,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263643561] [2022-12-05 22:23:13,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263643561] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:23:13,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680883514] [2022-12-05 22:23:13,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 22:23:13,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:23:13,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:23:13,967 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) [2022-12-05 22:23:13,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-05 22:23:14,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 22:23:14,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:23:14,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-05 22:23:14,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:23:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:23:14,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:23:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:23:14,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680883514] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:23:14,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:23:14,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-12-05 22:23:14,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189270515] [2022-12-05 22:23:14,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:23:14,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-05 22:23:14,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:23:14,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-05 22:23:14,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-05 22:23:14,146 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2022-12-05 22:23:14,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 102 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 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) [2022-12-05 22:23:14,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:23:14,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2022-12-05 22:23:14,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:23:14,421 INFO L130 PetriNetUnfolder]: 575/1488 cut-off events. [2022-12-05 22:23:14,421 INFO L131 PetriNetUnfolder]: For 548/554 co-relation queries the response was YES. [2022-12-05 22:23:14,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3285 conditions, 1488 events. 575/1488 cut-off events. For 548/554 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 8582 event pairs, 42 based on Foata normal form. 126/1544 useless extension candidates. Maximal degree in co-relation 811. Up to 306 conditions per place. [2022-12-05 22:23:14,428 INFO L137 encePairwiseOnDemand]: 24/31 looper letters, 129 selfloop transitions, 33 changer transitions 0/170 dead transitions. [2022-12-05 22:23:14,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 170 transitions, 932 flow [2022-12-05 22:23:14,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-05 22:23:14,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-05 22:23:14,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 304 transitions. [2022-12-05 22:23:14,431 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6129032258064516 [2022-12-05 22:23:14,431 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 102 flow. Second operand 16 states and 304 transitions. [2022-12-05 22:23:14,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 170 transitions, 932 flow [2022-12-05 22:23:14,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 170 transitions, 846 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 22:23:14,435 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 388 flow [2022-12-05 22:23:14,435 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=388, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2022-12-05 22:23:14,436 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 29 predicate places. [2022-12-05 22:23:14,436 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 388 flow [2022-12-05 22:23:14,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 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) [2022-12-05 22:23:14,436 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:23:14,436 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:23:14,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-05 22:23:14,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:23:14,641 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:23:14,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:23:14,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1210099308, now seen corresponding path program 3 times [2022-12-05 22:23:14,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:23:14,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063376312] [2022-12-05 22:23:14,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:23:14,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:23:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:23:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-05 22:23:14,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:23:14,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063376312] [2022-12-05 22:23:14,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063376312] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:23:14,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215264664] [2022-12-05 22:23:14,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 22:23:14,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:23:14,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:23:14,750 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) [2022-12-05 22:23:14,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-05 22:23:14,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 22:23:14,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:23:14,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-05 22:23:14,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:23:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-05 22:23:14,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 22:23:14,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215264664] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:23:14,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 22:23:14,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-05 22:23:14,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252084741] [2022-12-05 22:23:14,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:23:14,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 22:23:14,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:23:14,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 22:23:14,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-05 22:23:14,898 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 31 [2022-12-05 22:23:14,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 388 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2022-12-05 22:23:14,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:23:14,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 31 [2022-12-05 22:23:14,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:23:15,131 INFO L130 PetriNetUnfolder]: 1067/2182 cut-off events. [2022-12-05 22:23:15,131 INFO L131 PetriNetUnfolder]: For 5397/5397 co-relation queries the response was YES. [2022-12-05 22:23:15,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6436 conditions, 2182 events. 1067/2182 cut-off events. For 5397/5397 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 11408 event pairs, 219 based on Foata normal form. 0/2018 useless extension candidates. Maximal degree in co-relation 4998. Up to 878 conditions per place. [2022-12-05 22:23:15,148 INFO L137 encePairwiseOnDemand]: 23/31 looper letters, 100 selfloop transitions, 8 changer transitions 1/111 dead transitions. [2022-12-05 22:23:15,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 111 transitions, 908 flow [2022-12-05 22:23:15,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 22:23:15,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 22:23:15,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2022-12-05 22:23:15,150 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2022-12-05 22:23:15,150 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 388 flow. Second operand 5 states and 75 transitions. [2022-12-05 22:23:15,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 111 transitions, 908 flow [2022-12-05 22:23:15,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 111 transitions, 841 flow, removed 18 selfloop flow, removed 2 redundant places. [2022-12-05 22:23:15,163 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 398 flow [2022-12-05 22:23:15,163 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=398, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2022-12-05 22:23:15,163 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 35 predicate places. [2022-12-05 22:23:15,164 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 398 flow [2022-12-05 22:23:15,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2022-12-05 22:23:15,164 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:23:15,164 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:23:15,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-05 22:23:15,370 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 [2022-12-05 22:23:15,370 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:23:15,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:23:15,370 INFO L85 PathProgramCache]: Analyzing trace with hash 454134848, now seen corresponding path program 4 times [2022-12-05 22:23:15,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:23:15,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464108671] [2022-12-05 22:23:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:23:15,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:23:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:23:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-05 22:23:15,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:23:15,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464108671] [2022-12-05 22:23:15,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464108671] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:23:15,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923724959] [2022-12-05 22:23:15,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 22:23:15,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:23:15,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:23:15,479 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) [2022-12-05 22:23:15,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-05 22:23:15,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 22:23:15,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:23:15,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-05 22:23:15,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:23:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-05 22:23:15,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:23:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-05 22:23:15,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923724959] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:23:15,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:23:15,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-12-05 22:23:15,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393748242] [2022-12-05 22:23:15,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:23:15,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 22:23:15,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:23:15,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 22:23:15,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-05 22:23:15,657 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2022-12-05 22:23:15,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 398 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 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) [2022-12-05 22:23:15,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:23:15,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2022-12-05 22:23:15,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:23:15,899 INFO L130 PetriNetUnfolder]: 949/2316 cut-off events. [2022-12-05 22:23:15,899 INFO L131 PetriNetUnfolder]: For 6559/6583 co-relation queries the response was YES. [2022-12-05 22:23:15,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7024 conditions, 2316 events. 949/2316 cut-off events. For 6559/6583 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 13917 event pairs, 146 based on Foata normal form. 106/2406 useless extension candidates. Maximal degree in co-relation 5708. Up to 364 conditions per place. [2022-12-05 22:23:15,913 INFO L137 encePairwiseOnDemand]: 27/31 looper letters, 85 selfloop transitions, 17 changer transitions 0/115 dead transitions. [2022-12-05 22:23:15,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 115 transitions, 916 flow [2022-12-05 22:23:15,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 22:23:15,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 22:23:15,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2022-12-05 22:23:15,914 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6129032258064516 [2022-12-05 22:23:15,914 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 398 flow. Second operand 6 states and 114 transitions. [2022-12-05 22:23:15,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 115 transitions, 916 flow [2022-12-05 22:23:15,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 115 transitions, 916 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-05 22:23:15,943 INFO L231 Difference]: Finished difference. Result has 75 places, 67 transitions, 469 flow [2022-12-05 22:23:15,943 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=469, PETRI_PLACES=75, PETRI_TRANSITIONS=67} [2022-12-05 22:23:15,943 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 43 predicate places. [2022-12-05 22:23:15,943 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 67 transitions, 469 flow [2022-12-05 22:23:15,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 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) [2022-12-05 22:23:15,944 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:23:15,944 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:23:15,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-05 22:23:16,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:23:16,149 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:23:16,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:23:16,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1196661218, now seen corresponding path program 5 times [2022-12-05 22:23:16,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:23:16,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427729291] [2022-12-05 22:23:16,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:23:16,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:23:16,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:23:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-12-05 22:23:16,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:23:16,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427729291] [2022-12-05 22:23:16,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427729291] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:23:16,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:23:16,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-05 22:23:16,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715129821] [2022-12-05 22:23:16,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:23:16,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 22:23:16,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:23:16,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 22:23:16,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 22:23:16,203 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 31 [2022-12-05 22:23:16,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 67 transitions, 469 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-12-05 22:23:16,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:23:16,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 31 [2022-12-05 22:23:16,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:23:16,397 INFO L130 PetriNetUnfolder]: 891/1924 cut-off events. [2022-12-05 22:23:16,397 INFO L131 PetriNetUnfolder]: For 6881/6881 co-relation queries the response was YES. [2022-12-05 22:23:16,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6779 conditions, 1924 events. 891/1924 cut-off events. For 6881/6881 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 9918 event pairs, 261 based on Foata normal form. 80/2004 useless extension candidates. Maximal degree in co-relation 5828. Up to 1423 conditions per place. [2022-12-05 22:23:16,408 INFO L137 encePairwiseOnDemand]: 26/31 looper letters, 58 selfloop transitions, 3 changer transitions 3/66 dead transitions. [2022-12-05 22:23:16,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 66 transitions, 550 flow [2022-12-05 22:23:16,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 22:23:16,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 22:23:16,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2022-12-05 22:23:16,409 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5376344086021505 [2022-12-05 22:23:16,409 INFO L175 Difference]: Start difference. First operand has 75 places, 67 transitions, 469 flow. Second operand 3 states and 50 transitions. [2022-12-05 22:23:16,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 66 transitions, 550 flow [2022-12-05 22:23:16,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 522 flow, removed 7 selfloop flow, removed 6 redundant places. [2022-12-05 22:23:16,419 INFO L231 Difference]: Finished difference. Result has 68 places, 53 transitions, 336 flow [2022-12-05 22:23:16,420 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=336, PETRI_PLACES=68, PETRI_TRANSITIONS=53} [2022-12-05 22:23:16,420 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 36 predicate places. [2022-12-05 22:23:16,420 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 53 transitions, 336 flow [2022-12-05 22:23:16,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-12-05 22:23:16,420 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:23:16,421 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:23:16,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-05 22:23:16,421 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:23:16,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:23:16,421 INFO L85 PathProgramCache]: Analyzing trace with hash -67631808, now seen corresponding path program 6 times [2022-12-05 22:23:16,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:23:16,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240561352] [2022-12-05 22:23:16,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:23:16,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:23:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:23:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 39 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-05 22:23:16,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:23:16,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240561352] [2022-12-05 22:23:16,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240561352] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:23:16,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703133923] [2022-12-05 22:23:16,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 22:23:16,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:23:16,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:23:16,653 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) [2022-12-05 22:23:16,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-05 22:23:16,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-05 22:23:16,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:23:16,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 22:23:16,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:23:16,815 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-05 22:23:16,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 22:23:16,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703133923] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:23:16,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 22:23:16,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2022-12-05 22:23:16,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630533891] [2022-12-05 22:23:16,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:23:16,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 22:23:16,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:23:16,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 22:23:16,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-05 22:23:16,816 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 31 [2022-12-05 22:23:16,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 53 transitions, 336 flow. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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) [2022-12-05 22:23:16,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:23:16,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 31 [2022-12-05 22:23:16,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:23:17,014 INFO L130 PetriNetUnfolder]: 709/1544 cut-off events. [2022-12-05 22:23:17,014 INFO L131 PetriNetUnfolder]: For 3668/3668 co-relation queries the response was YES. [2022-12-05 22:23:17,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5235 conditions, 1544 events. 709/1544 cut-off events. For 3668/3668 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 7306 event pairs, 165 based on Foata normal form. 34/1578 useless extension candidates. Maximal degree in co-relation 3165. Up to 668 conditions per place. [2022-12-05 22:23:17,022 INFO L137 encePairwiseOnDemand]: 21/31 looper letters, 66 selfloop transitions, 17 changer transitions 0/85 dead transitions. [2022-12-05 22:23:17,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 85 transitions, 685 flow [2022-12-05 22:23:17,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 22:23:17,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 22:23:17,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 72 transitions. [2022-12-05 22:23:17,023 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3317972350230415 [2022-12-05 22:23:17,024 INFO L175 Difference]: Start difference. First operand has 68 places, 53 transitions, 336 flow. Second operand 7 states and 72 transitions. [2022-12-05 22:23:17,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 85 transitions, 685 flow [2022-12-05 22:23:17,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 85 transitions, 679 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-05 22:23:17,029 INFO L231 Difference]: Finished difference. Result has 74 places, 55 transitions, 399 flow [2022-12-05 22:23:17,029 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=399, PETRI_PLACES=74, PETRI_TRANSITIONS=55} [2022-12-05 22:23:17,030 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 42 predicate places. [2022-12-05 22:23:17,030 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 55 transitions, 399 flow [2022-12-05 22:23:17,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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) [2022-12-05 22:23:17,030 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:23:17,030 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:23:17,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-05 22:23:17,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:23:17,236 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:23:17,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:23:17,236 INFO L85 PathProgramCache]: Analyzing trace with hash -671535236, now seen corresponding path program 7 times [2022-12-05 22:23:17,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:23:17,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502469315] [2022-12-05 22:23:17,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:23:17,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:23:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:23:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-05 22:23:17,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:23:17,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502469315] [2022-12-05 22:23:17,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502469315] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:23:17,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713270120] [2022-12-05 22:23:17,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 22:23:17,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:23:17,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:23:17,458 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) [2022-12-05 22:23:17,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-05 22:23:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:23:17,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-05 22:23:17,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:23:17,643 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-05 22:23:17,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:23:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-05 22:23:17,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713270120] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:23:17,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:23:17,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 9 [2022-12-05 22:23:17,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354238856] [2022-12-05 22:23:17,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:23:17,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-05 22:23:17,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:23:17,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-05 22:23:17,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-05 22:23:17,769 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 31 [2022-12-05 22:23:17,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 55 transitions, 399 flow. Second operand has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 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) [2022-12-05 22:23:17,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:23:17,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 31 [2022-12-05 22:23:17,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:23:17,918 INFO L130 PetriNetUnfolder]: 375/832 cut-off events. [2022-12-05 22:23:17,918 INFO L131 PetriNetUnfolder]: For 2461/2461 co-relation queries the response was YES. [2022-12-05 22:23:17,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3127 conditions, 832 events. 375/832 cut-off events. For 2461/2461 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2941 event pairs, 95 based on Foata normal form. 28/860 useless extension candidates. Maximal degree in co-relation 1457. Up to 351 conditions per place. [2022-12-05 22:23:17,922 INFO L137 encePairwiseOnDemand]: 23/31 looper letters, 61 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2022-12-05 22:23:17,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 75 transitions, 629 flow [2022-12-05 22:23:17,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 22:23:17,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 22:23:17,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 70 transitions. [2022-12-05 22:23:17,923 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3225806451612903 [2022-12-05 22:23:17,924 INFO L175 Difference]: Start difference. First operand has 74 places, 55 transitions, 399 flow. Second operand 7 states and 70 transitions. [2022-12-05 22:23:17,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 75 transitions, 629 flow [2022-12-05 22:23:17,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 75 transitions, 561 flow, removed 22 selfloop flow, removed 8 redundant places. [2022-12-05 22:23:17,927 INFO L231 Difference]: Finished difference. Result has 70 places, 46 transitions, 293 flow [2022-12-05 22:23:17,928 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=293, PETRI_PLACES=70, PETRI_TRANSITIONS=46} [2022-12-05 22:23:17,928 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 38 predicate places. [2022-12-05 22:23:17,929 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 46 transitions, 293 flow [2022-12-05 22:23:17,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 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) [2022-12-05 22:23:17,929 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:23:17,929 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:23:17,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-05 22:23:18,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:23:18,136 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:23:18,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:23:18,136 INFO L85 PathProgramCache]: Analyzing trace with hash -2145523994, now seen corresponding path program 8 times [2022-12-05 22:23:18,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:23:18,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247808532] [2022-12-05 22:23:18,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:23:18,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:23:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:23:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:23:18,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:23:18,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247808532] [2022-12-05 22:23:18,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247808532] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:23:18,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82265675] [2022-12-05 22:23:18,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 22:23:18,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:23:18,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:23:18,648 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:23:18,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-05 22:23:18,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 22:23:18,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:23:18,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-05 22:23:18,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:23:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:23:19,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:23:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:23:28,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82265675] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:23:28,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:23:28,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 29 [2022-12-05 22:23:28,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231774318] [2022-12-05 22:23:28,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:23:28,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-05 22:23:28,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:23:28,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-05 22:23:28,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=811, Unknown=4, NotChecked=0, Total=930 [2022-12-05 22:23:28,970 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2022-12-05 22:23:28,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 46 transitions, 293 flow. Second operand has 31 states, 31 states have (on average 11.193548387096774) internal successors, (347), 31 states have internal predecessors, (347), 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) [2022-12-05 22:23:28,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:23:28,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2022-12-05 22:23:28,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:23:29,905 INFO L130 PetriNetUnfolder]: 242/655 cut-off events. [2022-12-05 22:23:29,905 INFO L131 PetriNetUnfolder]: For 1236/1242 co-relation queries the response was YES. [2022-12-05 22:23:29,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2206 conditions, 655 events. 242/655 cut-off events. For 1236/1242 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2400 event pairs, 23 based on Foata normal form. 22/675 useless extension candidates. Maximal degree in co-relation 1164. Up to 109 conditions per place. [2022-12-05 22:23:29,908 INFO L137 encePairwiseOnDemand]: 24/31 looper letters, 0 selfloop transitions, 0 changer transitions 93/93 dead transitions. [2022-12-05 22:23:29,908 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 93 transitions, 697 flow [2022-12-05 22:23:29,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-05 22:23:29,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-05 22:23:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 173 transitions. [2022-12-05 22:23:29,909 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4650537634408602 [2022-12-05 22:23:29,909 INFO L175 Difference]: Start difference. First operand has 70 places, 46 transitions, 293 flow. Second operand 12 states and 173 transitions. [2022-12-05 22:23:29,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 93 transitions, 697 flow [2022-12-05 22:23:29,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 93 transitions, 657 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-05 22:23:29,912 INFO L231 Difference]: Finished difference. Result has 74 places, 0 transitions, 0 flow [2022-12-05 22:23:29,913 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=0, PETRI_PLACES=74, PETRI_TRANSITIONS=0} [2022-12-05 22:23:29,913 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 42 predicate places. [2022-12-05 22:23:29,913 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 0 transitions, 0 flow [2022-12-05 22:23:29,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 11.193548387096774) internal successors, (347), 31 states have internal predecessors, (347), 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) [2022-12-05 22:23:29,915 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-05 22:23:29,916 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-05 22:23:29,916 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-05 22:23:29,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-05 22:23:30,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:23:30,123 INFO L458 BasicCegarLoop]: Path program histogram: [8, 1, 1] [2022-12-05 22:23:30,125 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-05 22:23:30,125 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-05 22:23:30,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 10:23:30 BasicIcfg [2022-12-05 22:23:30,127 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-05 22:23:30,128 INFO L158 Benchmark]: Toolchain (without parser) took 25019.80ms. Allocated memory was 181.4MB in the beginning and 314.6MB in the end (delta: 133.2MB). Free memory was 155.8MB in the beginning and 115.7MB in the end (delta: 40.1MB). Peak memory consumption was 172.8MB. Max. memory is 8.0GB. [2022-12-05 22:23:30,128 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 127.9MB. Free memory was 105.5MB in the beginning and 105.5MB in the end (delta: 30.2kB). There was no memory consumed. Max. memory is 8.0GB. [2022-12-05 22:23:30,128 INFO L158 Benchmark]: CACSL2BoogieTranslator took 475.45ms. Allocated memory is still 181.4MB. Free memory was 155.5MB in the beginning and 129.2MB in the end (delta: 26.3MB). Peak memory consumption was 26.2MB. Max. memory is 8.0GB. [2022-12-05 22:23:30,128 INFO L158 Benchmark]: Boogie Procedure Inliner took 78.43ms. Allocated memory is still 181.4MB. Free memory was 129.2MB in the beginning and 158.3MB in the end (delta: -29.1MB). Peak memory consumption was 4.7MB. Max. memory is 8.0GB. [2022-12-05 22:23:30,128 INFO L158 Benchmark]: Boogie Preprocessor took 18.72ms. Allocated memory is still 181.4MB. Free memory was 158.3MB in the beginning and 156.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-05 22:23:30,129 INFO L158 Benchmark]: RCFGBuilder took 487.46ms. Allocated memory is still 181.4MB. Free memory was 156.7MB in the beginning and 149.1MB in the end (delta: 7.6MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. [2022-12-05 22:23:30,129 INFO L158 Benchmark]: TraceAbstraction took 23955.45ms. Allocated memory was 181.4MB in the beginning and 314.6MB in the end (delta: 133.2MB). Free memory was 148.5MB in the beginning and 115.7MB in the end (delta: 32.8MB). Peak memory consumption was 166.7MB. Max. memory is 8.0GB. [2022-12-05 22:23:30,130 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 127.9MB. Free memory was 105.5MB in the beginning and 105.5MB in the end (delta: 30.2kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 475.45ms. Allocated memory is still 181.4MB. Free memory was 155.5MB in the beginning and 129.2MB in the end (delta: 26.3MB). Peak memory consumption was 26.2MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 78.43ms. Allocated memory is still 181.4MB. Free memory was 129.2MB in the beginning and 158.3MB in the end (delta: -29.1MB). Peak memory consumption was 4.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.72ms. Allocated memory is still 181.4MB. Free memory was 158.3MB in the beginning and 156.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 487.46ms. Allocated memory is still 181.4MB. Free memory was 156.7MB in the beginning and 149.1MB in the end (delta: 7.6MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. * TraceAbstraction took 23955.45ms. Allocated memory was 181.4MB in the beginning and 314.6MB in the end (delta: 133.2MB). Free memory was 148.5MB in the beginning and 115.7MB in the end (delta: 32.8MB). Peak memory consumption was 166.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.7s, 117 PlacesBefore, 32 PlacesAfterwards, 118 TransitionsBefore, 31 TransitionsAfterwards, 1922 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 6 ConcurrentSequentialCompositions, 53 TrivialYvCompositions, 32 ConcurrentYvCompositions, 2 ChoiceCompositions, 93 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 1442, independent: 1373, independent conditional: 1373, independent unconditional: 0, dependent: 69, dependent conditional: 69, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 1442, independent: 1373, independent conditional: 0, independent unconditional: 1373, dependent: 69, dependent conditional: 0, dependent unconditional: 69, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 1442, independent: 1373, independent conditional: 0, independent unconditional: 1373, dependent: 69, dependent conditional: 0, dependent unconditional: 69, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 1442, independent: 1373, independent conditional: 0, independent unconditional: 1373, dependent: 69, dependent conditional: 0, dependent unconditional: 69, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1167, independent: 1139, independent conditional: 0, independent unconditional: 1139, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1167, independent: 1115, independent conditional: 0, independent unconditional: 1115, dependent: 52, dependent conditional: 0, dependent unconditional: 52, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 52, independent: 24, independent conditional: 0, independent unconditional: 24, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 71, independent: 20, independent conditional: 0, independent unconditional: 20, dependent: 50, dependent conditional: 0, dependent unconditional: 50, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1442, independent: 234, independent conditional: 0, independent unconditional: 234, dependent: 41, dependent conditional: 0, dependent unconditional: 41, unknown: 1167, unknown conditional: 0, unknown unconditional: 1167] , Statistics on independence cache: Total cache size (in pairs): 1782, Positive cache size: 1754, Positive conditional cache size: 0, Positive unconditional cache size: 1754, Negative cache size: 28, Negative conditional cache size: 0, Negative unconditional cache size: 28, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - PositiveResult [Line: 919]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 167 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 23.9s, OverallIterations: 10, TraceHistogramMax: 4, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 541 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 541 mSDsluCounter, 5 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1 mSDsCounter, 47 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2308 IncrementalHoareTripleChecker+Invalid, 2355 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 47 mSolverCounterUnsat, 4 mSDtfsCounter, 2308 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 515 GetRequests, 410 SyntacticMatches, 23 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 9.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=469occurred in iteration=6, InterpolantAutomatonStates: 65, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 12.0s InterpolantComputationTime, 643 NumberOfCodeBlocks, 618 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 795 ConstructedInterpolants, 42 QuantifiedInterpolants, 5149 SizeOfPredicates, 17 NumberOfNonLiveVariables, 1813 ConjunctsInSsa, 60 ConjunctsInUnsatCore, 20 InterpolantComputations, 6 PerfectInterpolantSequences, 532/826 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-05 22:23:30,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...