/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-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-0612a5f-m [2022-09-20 20:52:37,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-20 20:52:37,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-20 20:52:37,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-20 20:52:37,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-20 20:52:37,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-20 20:52:37,566 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-20 20:52:37,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-20 20:52:37,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-20 20:52:37,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-20 20:52:37,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-20 20:52:37,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-20 20:52:37,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-20 20:52:37,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-20 20:52:37,581 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-20 20:52:37,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-20 20:52:37,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-20 20:52:37,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-20 20:52:37,585 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-20 20:52:37,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-20 20:52:37,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-20 20:52:37,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-20 20:52:37,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-20 20:52:37,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-20 20:52:37,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-20 20:52:37,603 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-20 20:52:37,603 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-20 20:52:37,605 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-20 20:52:37,605 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-20 20:52:37,606 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-20 20:52:37,606 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-20 20:52:37,607 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-20 20:52:37,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-20 20:52:37,609 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-20 20:52:37,610 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-20 20:52:37,610 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-20 20:52:37,610 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-20 20:52:37,611 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-20 20:52:37,611 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-20 20:52:37,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-20 20:52:37,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-20 20:52:37,613 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-NoLbe.epf [2022-09-20 20:52:37,647 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-20 20:52:37,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-20 20:52:37,648 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-20 20:52:37,648 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-20 20:52:37,648 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-20 20:52:37,649 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-20 20:52:37,649 INFO L138 SettingsManager]: * Use SBE=true [2022-09-20 20:52:37,649 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-20 20:52:37,649 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-20 20:52:37,649 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-20 20:52:37,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-20 20:52:37,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-20 20:52:37,650 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-20 20:52:37,650 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-20 20:52:37,650 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-20 20:52:37,650 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-20 20:52:37,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-20 20:52:37,650 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-20 20:52:37,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-20 20:52:37,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-20 20:52:37,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-20 20:52:37,651 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-20 20:52:37,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-20 20:52:37,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 20:52:37,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-20 20:52:37,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-20 20:52:37,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-20 20:52:37,654 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-20 20:52:37,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-20 20:52:37,655 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-20 20:52:37,655 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-20 20:52:37,655 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-20 20:52:37,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-20 20:52:37,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-20 20:52:37,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-20 20:52:37,931 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-20 20:52:37,934 INFO L275 PluginConnector]: CDTParser initialized [2022-09-20 20:52:37,935 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2022-09-20 20:52:37,999 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5dca1c78/26bab94af4f84c4d8738e4b316ae113f/FLAG9c5bdfc6b [2022-09-20 20:52:38,427 INFO L306 CDTParser]: Found 1 translation units. [2022-09-20 20:52:38,428 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2022-09-20 20:52:38,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5dca1c78/26bab94af4f84c4d8738e4b316ae113f/FLAG9c5bdfc6b [2022-09-20 20:52:38,443 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5dca1c78/26bab94af4f84c4d8738e4b316ae113f [2022-09-20 20:52:38,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-20 20:52:38,447 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-20 20:52:38,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-20 20:52:38,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-20 20:52:38,450 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-20 20:52:38,451 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 08:52:38" (1/1) ... [2022-09-20 20:52:38,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31069da0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:52:38, skipping insertion in model container [2022-09-20 20:52:38,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 08:52:38" (1/1) ... [2022-09-20 20:52:38,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-20 20:52:38,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-20 20:52:38,728 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2022-09-20 20:52:38,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 20:52:38,745 INFO L203 MainTranslator]: Completed pre-run [2022-09-20 20:52:38,782 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2022-09-20 20:52:38,785 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 20:52:38,800 INFO L208 MainTranslator]: Completed translation [2022-09-20 20:52:38,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:52:38 WrapperNode [2022-09-20 20:52:38,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-20 20:52:38,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-20 20:52:38,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-20 20:52:38,804 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-20 20:52:38,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:52:38" (1/1) ... [2022-09-20 20:52:38,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:52:38" (1/1) ... [2022-09-20 20:52:38,865 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 278 [2022-09-20 20:52:38,865 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-20 20:52:38,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-20 20:52:38,866 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-20 20:52:38,866 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-20 20:52:38,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:52:38" (1/1) ... [2022-09-20 20:52:38,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:52:38" (1/1) ... [2022-09-20 20:52:38,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:52:38" (1/1) ... [2022-09-20 20:52:38,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:52:38" (1/1) ... [2022-09-20 20:52:38,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:52:38" (1/1) ... [2022-09-20 20:52:38,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:52:38" (1/1) ... [2022-09-20 20:52:38,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:52:38" (1/1) ... [2022-09-20 20:52:38,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-20 20:52:38,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-20 20:52:38,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-20 20:52:38,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-20 20:52:38,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:52:38" (1/1) ... [2022-09-20 20:52:38,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 20:52:38,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:52:38,953 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) [2022-09-20 20:52:38,964 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 [2022-09-20 20:52:38,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-20 20:52:38,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-20 20:52:38,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-20 20:52:38,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-20 20:52:38,991 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-09-20 20:52:38,992 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-09-20 20:52:38,992 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-09-20 20:52:38,992 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-09-20 20:52:38,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-20 20:52:38,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-09-20 20:52:38,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-20 20:52:38,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-20 20:52:38,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-20 20:52:38,994 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-20 20:52:39,128 INFO L234 CfgBuilder]: Building ICFG [2022-09-20 20:52:39,130 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-20 20:52:39,543 INFO L275 CfgBuilder]: Performing block encoding [2022-09-20 20:52:39,560 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-20 20:52:39,560 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-09-20 20:52:39,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 08:52:39 BoogieIcfgContainer [2022-09-20 20:52:39,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-20 20:52:39,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-20 20:52:39,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-20 20:52:39,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-20 20:52:39,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 08:52:38" (1/3) ... [2022-09-20 20:52:39,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d73f058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 08:52:39, skipping insertion in model container [2022-09-20 20:52:39,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:52:38" (2/3) ... [2022-09-20 20:52:39,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d73f058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 08:52:39, skipping insertion in model container [2022-09-20 20:52:39,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 08:52:39" (3/3) ... [2022-09-20 20:52:39,571 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2022-09-20 20:52:39,586 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-20 20:52:39,586 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-09-20 20:52:39,586 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-20 20:52:39,697 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-09-20 20:52:39,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 325 places, 353 transitions, 722 flow [2022-09-20 20:52:39,894 INFO L130 PetriNetUnfolder]: 35/351 cut-off events. [2022-09-20 20:52:39,895 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-09-20 20:52:39,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 351 events. 35/351 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 737 event pairs, 0 based on Foata normal form. 0/315 useless extension candidates. Maximal degree in co-relation 211. Up to 2 conditions per place. [2022-09-20 20:52:39,903 INFO L82 GeneralOperation]: Start removeDead. Operand has 325 places, 353 transitions, 722 flow [2022-09-20 20:52:39,914 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 314 places, 342 transitions, 696 flow [2022-09-20 20:52:39,931 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 20:52:39,937 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;@760a8899, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 20:52:39,938 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-09-20 20:52:40,001 INFO L130 PetriNetUnfolder]: 35/341 cut-off events. [2022-09-20 20:52:40,002 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-09-20 20:52:40,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:52:40,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:52:40,003 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:52:40,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:52:40,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1820237032, now seen corresponding path program 1 times [2022-09-20 20:52:40,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:52:40,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524680311] [2022-09-20 20:52:40,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:52:40,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:52:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:52:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:52:40,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:52:40,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524680311] [2022-09-20 20:52:40,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524680311] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:52:40,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:52:40,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-20 20:52:40,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590400189] [2022-09-20 20:52:40,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:52:40,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-09-20 20:52:40,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:52:40,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-09-20 20:52:40,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-09-20 20:52:40,322 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 353 [2022-09-20 20:52:40,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 342 transitions, 696 flow. Second operand has 2 states, 2 states have (on average 337.5) internal successors, (675), 2 states have internal predecessors, (675), 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) [2022-09-20 20:52:40,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:52:40,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 353 [2022-09-20 20:52:40,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:52:40,408 INFO L130 PetriNetUnfolder]: 21/328 cut-off events. [2022-09-20 20:52:40,409 INFO L131 PetriNetUnfolder]: For 8/9 co-relation queries the response was YES. [2022-09-20 20:52:40,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 328 events. 21/328 cut-off events. For 8/9 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 714 event pairs, 0 based on Foata normal form. 17/313 useless extension candidates. Maximal degree in co-relation 202. Up to 5 conditions per place. [2022-09-20 20:52:40,416 INFO L137 encePairwiseOnDemand]: 339/353 looper letters, 4 selfloop transitions, 0 changer transitions 3/328 dead transitions. [2022-09-20 20:52:40,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 328 transitions, 676 flow [2022-09-20 20:52:40,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-20 20:52:40,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-09-20 20:52:40,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 686 transitions. [2022-09-20 20:52:40,434 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9716713881019831 [2022-09-20 20:52:40,434 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 686 transitions. [2022-09-20 20:52:40,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 686 transitions. [2022-09-20 20:52:40,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:52:40,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 686 transitions. [2022-09-20 20:52:40,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 343.0) internal successors, (686), 2 states have internal predecessors, (686), 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) [2022-09-20 20:52:40,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 353.0) internal successors, (1059), 3 states have internal predecessors, (1059), 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) [2022-09-20 20:52:40,480 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 353.0) internal successors, (1059), 3 states have internal predecessors, (1059), 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) [2022-09-20 20:52:40,482 INFO L175 Difference]: Start difference. First operand has 314 places, 342 transitions, 696 flow. Second operand 2 states and 686 transitions. [2022-09-20 20:52:40,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 328 transitions, 676 flow [2022-09-20 20:52:40,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 328 transitions, 668 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-09-20 20:52:40,494 INFO L231 Difference]: Finished difference. Result has 311 places, 325 transitions, 654 flow [2022-09-20 20:52:40,497 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=654, PETRI_PLACES=311, PETRI_TRANSITIONS=325} [2022-09-20 20:52:40,502 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, -3 predicate places. [2022-09-20 20:52:40,502 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 325 transitions, 654 flow [2022-09-20 20:52:40,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 337.5) internal successors, (675), 2 states have internal predecessors, (675), 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) [2022-09-20 20:52:40,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:52:40,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:52:40,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-20 20:52:40,504 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:52:40,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:52:40,506 INFO L85 PathProgramCache]: Analyzing trace with hash -605851945, now seen corresponding path program 1 times [2022-09-20 20:52:40,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:52:40,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921417507] [2022-09-20 20:52:40,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:52:40,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:52:40,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:52:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:52:40,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:52:40,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921417507] [2022-09-20 20:52:40,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921417507] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:52:40,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:52:40,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 20:52:40,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628776137] [2022-09-20 20:52:40,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:52:40,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 20:52:40,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:52:40,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 20:52:40,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 20:52:40,665 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 353 [2022-09-20 20:52:40,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 325 transitions, 654 flow. Second operand has 3 states, 3 states have (on average 308.0) internal successors, (924), 3 states have internal predecessors, (924), 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) [2022-09-20 20:52:40,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:52:40,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 353 [2022-09-20 20:52:40,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:52:41,279 INFO L130 PetriNetUnfolder]: 642/3582 cut-off events. [2022-09-20 20:52:41,280 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2022-09-20 20:52:41,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4430 conditions, 3582 events. 642/3582 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 33623 event pairs, 264 based on Foata normal form. 0/3053 useless extension candidates. Maximal degree in co-relation 4427. Up to 505 conditions per place. [2022-09-20 20:52:41,309 INFO L137 encePairwiseOnDemand]: 345/353 looper letters, 55 selfloop transitions, 4 changer transitions 0/350 dead transitions. [2022-09-20 20:52:41,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 350 transitions, 825 flow [2022-09-20 20:52:41,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 20:52:41,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 20:52:41,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 975 transitions. [2022-09-20 20:52:41,319 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9206798866855525 [2022-09-20 20:52:41,319 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 975 transitions. [2022-09-20 20:52:41,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 975 transitions. [2022-09-20 20:52:41,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:52:41,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 975 transitions. [2022-09-20 20:52:41,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 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) [2022-09-20 20:52:41,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 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) [2022-09-20 20:52:41,326 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 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) [2022-09-20 20:52:41,326 INFO L175 Difference]: Start difference. First operand has 311 places, 325 transitions, 654 flow. Second operand 3 states and 975 transitions. [2022-09-20 20:52:41,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 350 transitions, 825 flow [2022-09-20 20:52:41,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 350 transitions, 825 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 20:52:41,338 INFO L231 Difference]: Finished difference. Result has 312 places, 329 transitions, 694 flow [2022-09-20 20:52:41,339 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=694, PETRI_PLACES=312, PETRI_TRANSITIONS=329} [2022-09-20 20:52:41,339 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, -2 predicate places. [2022-09-20 20:52:41,340 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 329 transitions, 694 flow [2022-09-20 20:52:41,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 308.0) internal successors, (924), 3 states have internal predecessors, (924), 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) [2022-09-20 20:52:41,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:52:41,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:52:41,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-20 20:52:41,341 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:52:41,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:52:41,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1794773799, now seen corresponding path program 1 times [2022-09-20 20:52:41,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:52:41,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586986694] [2022-09-20 20:52:41,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:52:41,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:52:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:52:41,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:52:41,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:52:41,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586986694] [2022-09-20 20:52:41,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586986694] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:52:41,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:52:41,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 20:52:41,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520645965] [2022-09-20 20:52:41,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:52:41,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 20:52:41,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:52:41,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 20:52:41,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 20:52:41,461 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 353 [2022-09-20 20:52:41,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 329 transitions, 694 flow. Second operand has 3 states, 3 states have (on average 308.0) internal successors, (924), 3 states have internal predecessors, (924), 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) [2022-09-20 20:52:41,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:52:41,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 353 [2022-09-20 20:52:41,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:52:41,906 INFO L130 PetriNetUnfolder]: 475/3127 cut-off events. [2022-09-20 20:52:41,906 INFO L131 PetriNetUnfolder]: For 259/259 co-relation queries the response was YES. [2022-09-20 20:52:41,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3889 conditions, 3127 events. 475/3127 cut-off events. For 259/259 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 29508 event pairs, 253 based on Foata normal form. 49/2760 useless extension candidates. Maximal degree in co-relation 3884. Up to 317 conditions per place. [2022-09-20 20:52:41,926 INFO L137 encePairwiseOnDemand]: 347/353 looper letters, 57 selfloop transitions, 2 changer transitions 0/350 dead transitions. [2022-09-20 20:52:41,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 350 transitions, 853 flow [2022-09-20 20:52:41,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 20:52:41,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 20:52:41,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 973 transitions. [2022-09-20 20:52:41,929 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9187913125590179 [2022-09-20 20:52:41,929 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 973 transitions. [2022-09-20 20:52:41,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 973 transitions. [2022-09-20 20:52:41,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:52:41,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 973 transitions. [2022-09-20 20:52:41,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 324.3333333333333) internal successors, (973), 3 states have internal predecessors, (973), 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) [2022-09-20 20:52:41,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 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) [2022-09-20 20:52:41,935 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 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) [2022-09-20 20:52:41,936 INFO L175 Difference]: Start difference. First operand has 312 places, 329 transitions, 694 flow. Second operand 3 states and 973 transitions. [2022-09-20 20:52:41,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 350 transitions, 853 flow [2022-09-20 20:52:41,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 350 transitions, 851 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 20:52:41,944 INFO L231 Difference]: Finished difference. Result has 315 places, 329 transitions, 704 flow [2022-09-20 20:52:41,944 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=704, PETRI_PLACES=315, PETRI_TRANSITIONS=329} [2022-09-20 20:52:41,946 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 1 predicate places. [2022-09-20 20:52:41,946 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 329 transitions, 704 flow [2022-09-20 20:52:41,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 308.0) internal successors, (924), 3 states have internal predecessors, (924), 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) [2022-09-20 20:52:41,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:52:41,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:52:41,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-09-20 20:52:41,947 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:52:41,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:52:41,948 INFO L85 PathProgramCache]: Analyzing trace with hash 793533321, now seen corresponding path program 1 times [2022-09-20 20:52:41,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:52:41,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49180480] [2022-09-20 20:52:41,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:52:41,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:52:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:52:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:52:42,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:52:42,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49180480] [2022-09-20 20:52:42,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49180480] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:52:42,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:52:42,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-09-20 20:52:42,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598956524] [2022-09-20 20:52:42,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:52:42,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-20 20:52:42,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:52:42,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-20 20:52:42,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-20 20:52:42,063 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 353 [2022-09-20 20:52:42,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 329 transitions, 704 flow. Second operand has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 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) [2022-09-20 20:52:42,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:52:42,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 353 [2022-09-20 20:52:42,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:52:42,340 INFO L130 PetriNetUnfolder]: 176/1977 cut-off events. [2022-09-20 20:52:42,340 INFO L131 PetriNetUnfolder]: For 25/47 co-relation queries the response was YES. [2022-09-20 20:52:42,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2225 conditions, 1977 events. 176/1977 cut-off events. For 25/47 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 14915 event pairs, 22 based on Foata normal form. 1/1770 useless extension candidates. Maximal degree in co-relation 2219. Up to 73 conditions per place. [2022-09-20 20:52:42,353 INFO L137 encePairwiseOnDemand]: 341/353 looper letters, 27 selfloop transitions, 11 changer transitions 0/344 dead transitions. [2022-09-20 20:52:42,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 344 transitions, 814 flow [2022-09-20 20:52:42,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-20 20:52:42,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-09-20 20:52:42,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1299 transitions. [2022-09-20 20:52:42,356 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.919971671388102 [2022-09-20 20:52:42,356 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1299 transitions. [2022-09-20 20:52:42,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1299 transitions. [2022-09-20 20:52:42,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:52:42,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1299 transitions. [2022-09-20 20:52:42,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 324.75) internal successors, (1299), 4 states have internal predecessors, (1299), 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) [2022-09-20 20:52:42,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 353.0) internal successors, (1765), 5 states have internal predecessors, (1765), 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) [2022-09-20 20:52:42,364 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 353.0) internal successors, (1765), 5 states have internal predecessors, (1765), 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) [2022-09-20 20:52:42,364 INFO L175 Difference]: Start difference. First operand has 315 places, 329 transitions, 704 flow. Second operand 4 states and 1299 transitions. [2022-09-20 20:52:42,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 344 transitions, 814 flow [2022-09-20 20:52:42,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 344 transitions, 812 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 20:52:42,370 INFO L231 Difference]: Finished difference. Result has 320 places, 335 transitions, 772 flow [2022-09-20 20:52:42,370 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=772, PETRI_PLACES=320, PETRI_TRANSITIONS=335} [2022-09-20 20:52:42,372 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 6 predicate places. [2022-09-20 20:52:42,372 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 335 transitions, 772 flow [2022-09-20 20:52:42,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 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) [2022-09-20 20:52:42,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:52:42,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:52:42,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-09-20 20:52:42,378 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:52:42,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:52:42,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1725960401, now seen corresponding path program 1 times [2022-09-20 20:52:42,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:52:42,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539070341] [2022-09-20 20:52:42,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:52:42,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:52:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:52:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:52:42,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:52:42,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539070341] [2022-09-20 20:52:42,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539070341] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:52:42,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:52:42,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 20:52:42,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067351417] [2022-09-20 20:52:42,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:52:42,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 20:52:42,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:52:42,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 20:52:42,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-09-20 20:52:42,466 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 353 [2022-09-20 20:52:42,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 335 transitions, 772 flow. Second operand has 5 states, 5 states have (on average 318.6) internal successors, (1593), 5 states have internal predecessors, (1593), 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) [2022-09-20 20:52:42,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:52:42,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 353 [2022-09-20 20:52:42,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:52:42,695 INFO L130 PetriNetUnfolder]: 132/1424 cut-off events. [2022-09-20 20:52:42,695 INFO L131 PetriNetUnfolder]: For 42/53 co-relation queries the response was YES. [2022-09-20 20:52:42,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1730 conditions, 1424 events. 132/1424 cut-off events. For 42/53 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 9500 event pairs, 31 based on Foata normal form. 2/1293 useless extension candidates. Maximal degree in co-relation 1722. Up to 113 conditions per place. [2022-09-20 20:52:42,711 INFO L137 encePairwiseOnDemand]: 342/353 looper letters, 30 selfloop transitions, 9 changer transitions 0/352 dead transitions. [2022-09-20 20:52:42,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 352 transitions, 890 flow [2022-09-20 20:52:42,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-09-20 20:52:42,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-09-20 20:52:42,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1937 transitions. [2022-09-20 20:52:42,715 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9145420207743153 [2022-09-20 20:52:42,715 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1937 transitions. [2022-09-20 20:52:42,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1937 transitions. [2022-09-20 20:52:42,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:52:42,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1937 transitions. [2022-09-20 20:52:42,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 322.8333333333333) internal successors, (1937), 6 states have internal predecessors, (1937), 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) [2022-09-20 20:52:42,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 353.0) internal successors, (2471), 7 states have internal predecessors, (2471), 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) [2022-09-20 20:52:42,726 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 353.0) internal successors, (2471), 7 states have internal predecessors, (2471), 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) [2022-09-20 20:52:42,726 INFO L175 Difference]: Start difference. First operand has 320 places, 335 transitions, 772 flow. Second operand 6 states and 1937 transitions. [2022-09-20 20:52:42,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 352 transitions, 890 flow [2022-09-20 20:52:42,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 352 transitions, 890 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 20:52:42,738 INFO L231 Difference]: Finished difference. Result has 329 places, 341 transitions, 831 flow [2022-09-20 20:52:42,739 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=831, PETRI_PLACES=329, PETRI_TRANSITIONS=341} [2022-09-20 20:52:42,740 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 15 predicate places. [2022-09-20 20:52:42,741 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 341 transitions, 831 flow [2022-09-20 20:52:42,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 318.6) internal successors, (1593), 5 states have internal predecessors, (1593), 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) [2022-09-20 20:52:42,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:52:42,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:52:42,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-09-20 20:52:42,742 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:52:42,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:52:42,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1510773573, now seen corresponding path program 1 times [2022-09-20 20:52:42,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:52:42,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293612857] [2022-09-20 20:52:42,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:52:42,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:52:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:52:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:52:42,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:52:42,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293612857] [2022-09-20 20:52:42,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293612857] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:52:42,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:52:42,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 20:52:42,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645639096] [2022-09-20 20:52:42,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:52:42,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 20:52:42,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:52:42,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 20:52:42,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-09-20 20:52:42,816 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 353 [2022-09-20 20:52:42,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 341 transitions, 831 flow. Second operand has 5 states, 5 states have (on average 318.6) internal successors, (1593), 5 states have internal predecessors, (1593), 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) [2022-09-20 20:52:42,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:52:42,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 353 [2022-09-20 20:52:42,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:52:43,128 INFO L130 PetriNetUnfolder]: 211/2381 cut-off events. [2022-09-20 20:52:43,128 INFO L131 PetriNetUnfolder]: For 132/143 co-relation queries the response was YES. [2022-09-20 20:52:43,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2892 conditions, 2381 events. 211/2381 cut-off events. For 132/143 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 18252 event pairs, 42 based on Foata normal form. 0/2127 useless extension candidates. Maximal degree in co-relation 2879. Up to 171 conditions per place. [2022-09-20 20:52:43,155 INFO L137 encePairwiseOnDemand]: 342/353 looper letters, 29 selfloop transitions, 9 changer transitions 0/357 dead transitions. [2022-09-20 20:52:43,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 357 transitions, 944 flow [2022-09-20 20:52:43,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-09-20 20:52:43,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-09-20 20:52:43,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1936 transitions. [2022-09-20 20:52:43,159 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9140698772426817 [2022-09-20 20:52:43,159 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1936 transitions. [2022-09-20 20:52:43,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1936 transitions. [2022-09-20 20:52:43,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:52:43,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1936 transitions. [2022-09-20 20:52:43,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 322.6666666666667) internal successors, (1936), 6 states have internal predecessors, (1936), 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) [2022-09-20 20:52:43,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 353.0) internal successors, (2471), 7 states have internal predecessors, (2471), 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) [2022-09-20 20:52:43,167 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 353.0) internal successors, (2471), 7 states have internal predecessors, (2471), 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) [2022-09-20 20:52:43,168 INFO L175 Difference]: Start difference. First operand has 329 places, 341 transitions, 831 flow. Second operand 6 states and 1936 transitions. [2022-09-20 20:52:43,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 357 transitions, 944 flow [2022-09-20 20:52:43,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 357 transitions, 939 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 20:52:43,177 INFO L231 Difference]: Finished difference. Result has 337 places, 347 transitions, 885 flow [2022-09-20 20:52:43,178 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=885, PETRI_PLACES=337, PETRI_TRANSITIONS=347} [2022-09-20 20:52:43,180 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 23 predicate places. [2022-09-20 20:52:43,180 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 347 transitions, 885 flow [2022-09-20 20:52:43,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 318.6) internal successors, (1593), 5 states have internal predecessors, (1593), 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) [2022-09-20 20:52:43,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:52:43,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:52:43,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-09-20 20:52:43,181 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:52:43,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:52:43,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1722881034, now seen corresponding path program 1 times [2022-09-20 20:52:43,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:52:43,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606961762] [2022-09-20 20:52:43,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:52:43,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:52:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:52:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:52:43,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:52:43,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606961762] [2022-09-20 20:52:43,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606961762] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:52:43,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:52:43,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 20:52:43,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242526451] [2022-09-20 20:52:43,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:52:43,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 20:52:43,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:52:43,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 20:52:43,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-09-20 20:52:43,279 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 353 [2022-09-20 20:52:43,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 347 transitions, 885 flow. Second operand has 5 states, 5 states have (on average 324.4) internal successors, (1622), 5 states have internal predecessors, (1622), 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) [2022-09-20 20:52:43,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:52:43,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 353 [2022-09-20 20:52:43,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:52:43,529 INFO L130 PetriNetUnfolder]: 110/1717 cut-off events. [2022-09-20 20:52:43,529 INFO L131 PetriNetUnfolder]: For 75/87 co-relation queries the response was YES. [2022-09-20 20:52:43,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2075 conditions, 1717 events. 110/1717 cut-off events. For 75/87 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 11619 event pairs, 4 based on Foata normal form. 0/1581 useless extension candidates. Maximal degree in co-relation 2058. Up to 53 conditions per place. [2022-09-20 20:52:43,546 INFO L137 encePairwiseOnDemand]: 348/353 looper letters, 16 selfloop transitions, 4 changer transitions 0/351 dead transitions. [2022-09-20 20:52:43,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 351 transitions, 933 flow [2022-09-20 20:52:43,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-20 20:52:43,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-20 20:52:43,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1631 transitions. [2022-09-20 20:52:43,550 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9240793201133144 [2022-09-20 20:52:43,550 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1631 transitions. [2022-09-20 20:52:43,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1631 transitions. [2022-09-20 20:52:43,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:52:43,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1631 transitions. [2022-09-20 20:52:43,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 326.2) internal successors, (1631), 5 states have internal predecessors, (1631), 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) [2022-09-20 20:52:43,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 353.0) internal successors, (2118), 6 states have internal predecessors, (2118), 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) [2022-09-20 20:52:43,557 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 353.0) internal successors, (2118), 6 states have internal predecessors, (2118), 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) [2022-09-20 20:52:43,557 INFO L175 Difference]: Start difference. First operand has 337 places, 347 transitions, 885 flow. Second operand 5 states and 1631 transitions. [2022-09-20 20:52:43,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 351 transitions, 933 flow [2022-09-20 20:52:43,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 351 transitions, 928 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 20:52:43,564 INFO L231 Difference]: Finished difference. Result has 341 places, 348 transitions, 896 flow [2022-09-20 20:52:43,565 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=896, PETRI_PLACES=341, PETRI_TRANSITIONS=348} [2022-09-20 20:52:43,565 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 27 predicate places. [2022-09-20 20:52:43,566 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 348 transitions, 896 flow [2022-09-20 20:52:43,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 324.4) internal successors, (1622), 5 states have internal predecessors, (1622), 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) [2022-09-20 20:52:43,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:52:43,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:52:43,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-09-20 20:52:43,567 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:52:43,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:52:43,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1414614717, now seen corresponding path program 1 times [2022-09-20 20:52:43,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:52:43,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097130834] [2022-09-20 20:52:43,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:52:43,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:52:43,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:52:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:52:43,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:52:43,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097130834] [2022-09-20 20:52:43,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097130834] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:52:43,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829698981] [2022-09-20 20:52:43,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:52:43,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:52:43,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:52:43,643 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) [2022-09-20 20:52:43,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-09-20 20:52:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:52:43,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 6 conjunts are in the unsatisfiable core [2022-09-20 20:52:43,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:52:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:52:43,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 20:52:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:52:43,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829698981] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 20:52:43,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 20:52:43,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-09-20 20:52:43,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355776166] [2022-09-20 20:52:43,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 20:52:43,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-09-20 20:52:43,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:52:43,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-09-20 20:52:43,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-09-20 20:52:43,993 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 353 [2022-09-20 20:52:43,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 348 transitions, 896 flow. Second operand has 14 states, 14 states have (on average 323.64285714285717) internal successors, (4531), 14 states have internal predecessors, (4531), 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) [2022-09-20 20:52:43,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:52:43,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 353 [2022-09-20 20:52:43,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:52:44,344 INFO L130 PetriNetUnfolder]: 110/1726 cut-off events. [2022-09-20 20:52:44,344 INFO L131 PetriNetUnfolder]: For 76/88 co-relation queries the response was YES. [2022-09-20 20:52:44,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2096 conditions, 1726 events. 110/1726 cut-off events. For 76/88 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 11653 event pairs, 4 based on Foata normal form. 2/1593 useless extension candidates. Maximal degree in co-relation 2078. Up to 53 conditions per place. [2022-09-20 20:52:44,360 INFO L137 encePairwiseOnDemand]: 345/353 looper letters, 17 selfloop transitions, 11 changer transitions 0/358 dead transitions. [2022-09-20 20:52:44,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 358 transitions, 974 flow [2022-09-20 20:52:44,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-09-20 20:52:44,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-09-20 20:52:44,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3561 transitions. [2022-09-20 20:52:44,367 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9170744269894412 [2022-09-20 20:52:44,367 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3561 transitions. [2022-09-20 20:52:44,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3561 transitions. [2022-09-20 20:52:44,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:52:44,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3561 transitions. [2022-09-20 20:52:44,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 323.72727272727275) internal successors, (3561), 11 states have internal predecessors, (3561), 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) [2022-09-20 20:52:44,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 353.0) internal successors, (4236), 12 states have internal predecessors, (4236), 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) [2022-09-20 20:52:44,382 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 353.0) internal successors, (4236), 12 states have internal predecessors, (4236), 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) [2022-09-20 20:52:44,382 INFO L175 Difference]: Start difference. First operand has 341 places, 348 transitions, 896 flow. Second operand 11 states and 3561 transitions. [2022-09-20 20:52:44,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 358 transitions, 974 flow [2022-09-20 20:52:44,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 358 transitions, 968 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-09-20 20:52:44,390 INFO L231 Difference]: Finished difference. Result has 351 places, 354 transitions, 945 flow [2022-09-20 20:52:44,390 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=945, PETRI_PLACES=351, PETRI_TRANSITIONS=354} [2022-09-20 20:52:44,391 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 37 predicate places. [2022-09-20 20:52:44,391 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 354 transitions, 945 flow [2022-09-20 20:52:44,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 323.64285714285717) internal successors, (4531), 14 states have internal predecessors, (4531), 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) [2022-09-20 20:52:44,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:52:44,393 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:52:44,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-09-20 20:52:44,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:52:44,616 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:52:44,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:52:44,616 INFO L85 PathProgramCache]: Analyzing trace with hash -523708949, now seen corresponding path program 2 times [2022-09-20 20:52:44,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:52:44,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744500866] [2022-09-20 20:52:44,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:52:44,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:52:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:52:44,729 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 20:52:44,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:52:44,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744500866] [2022-09-20 20:52:44,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744500866] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:52:44,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:52:44,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-09-20 20:52:44,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566590667] [2022-09-20 20:52:44,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:52:44,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-09-20 20:52:44,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:52:44,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-09-20 20:52:44,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-09-20 20:52:44,734 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 353 [2022-09-20 20:52:44,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 354 transitions, 945 flow. Second operand has 8 states, 8 states have (on average 309.125) internal successors, (2473), 8 states have internal predecessors, (2473), 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) [2022-09-20 20:52:44,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:52:44,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 353 [2022-09-20 20:52:44,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:52:45,112 INFO L130 PetriNetUnfolder]: 111/1830 cut-off events. [2022-09-20 20:52:45,113 INFO L131 PetriNetUnfolder]: For 78/90 co-relation queries the response was YES. [2022-09-20 20:52:45,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2404 conditions, 1830 events. 111/1830 cut-off events. For 78/90 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 12306 event pairs, 4 based on Foata normal form. 8/1703 useless extension candidates. Maximal degree in co-relation 2383. Up to 128 conditions per place. [2022-09-20 20:52:45,128 INFO L137 encePairwiseOnDemand]: 344/353 looper letters, 35 selfloop transitions, 4 changer transitions 5/369 dead transitions. [2022-09-20 20:52:45,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 369 transitions, 1063 flow [2022-09-20 20:52:45,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-09-20 20:52:45,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-09-20 20:52:45,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2493 transitions. [2022-09-20 20:52:45,134 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8827903682719547 [2022-09-20 20:52:45,134 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2493 transitions. [2022-09-20 20:52:45,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2493 transitions. [2022-09-20 20:52:45,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:52:45,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2493 transitions. [2022-09-20 20:52:45,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 311.625) internal successors, (2493), 8 states have internal predecessors, (2493), 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) [2022-09-20 20:52:45,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 353.0) internal successors, (3177), 9 states have internal predecessors, (3177), 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) [2022-09-20 20:52:45,146 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 353.0) internal successors, (3177), 9 states have internal predecessors, (3177), 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) [2022-09-20 20:52:45,146 INFO L175 Difference]: Start difference. First operand has 351 places, 354 transitions, 945 flow. Second operand 8 states and 2493 transitions. [2022-09-20 20:52:45,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 369 transitions, 1063 flow [2022-09-20 20:52:45,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 369 transitions, 1054 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-09-20 20:52:45,154 INFO L231 Difference]: Finished difference. Result has 361 places, 357 transitions, 972 flow [2022-09-20 20:52:45,155 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=972, PETRI_PLACES=361, PETRI_TRANSITIONS=357} [2022-09-20 20:52:45,156 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 47 predicate places. [2022-09-20 20:52:45,156 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 357 transitions, 972 flow [2022-09-20 20:52:45,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 309.125) internal successors, (2473), 8 states have internal predecessors, (2473), 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) [2022-09-20 20:52:45,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:52:45,157 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:52:45,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-09-20 20:52:45,158 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:52:45,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:52:45,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1163854113, now seen corresponding path program 1 times [2022-09-20 20:52:45,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:52:45,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738089800] [2022-09-20 20:52:45,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:52:45,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:52:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:52:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 20:52:45,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:52:45,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738089800] [2022-09-20 20:52:45,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738089800] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:52:45,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:52:45,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-09-20 20:52:45,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470716226] [2022-09-20 20:52:45,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:52:45,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-20 20:52:45,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:52:45,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-20 20:52:45,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-20 20:52:45,223 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 353 [2022-09-20 20:52:45,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 357 transitions, 972 flow. Second operand has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 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) [2022-09-20 20:52:45,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:52:45,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 353 [2022-09-20 20:52:45,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:52:45,742 INFO L130 PetriNetUnfolder]: 286/2931 cut-off events. [2022-09-20 20:52:45,742 INFO L131 PetriNetUnfolder]: For 206/217 co-relation queries the response was YES. [2022-09-20 20:52:45,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3949 conditions, 2931 events. 286/2931 cut-off events. For 206/217 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 23823 event pairs, 59 based on Foata normal form. 0/2625 useless extension candidates. Maximal degree in co-relation 3922. Up to 191 conditions per place. [2022-09-20 20:52:45,763 INFO L137 encePairwiseOnDemand]: 341/353 looper letters, 26 selfloop transitions, 11 changer transitions 0/371 dead transitions. [2022-09-20 20:52:45,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 371 transitions, 1077 flow [2022-09-20 20:52:45,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-20 20:52:45,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-09-20 20:52:45,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1298 transitions. [2022-09-20 20:52:45,766 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9192634560906515 [2022-09-20 20:52:45,767 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1298 transitions. [2022-09-20 20:52:45,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1298 transitions. [2022-09-20 20:52:45,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:52:45,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1298 transitions. [2022-09-20 20:52:45,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 324.5) internal successors, (1298), 4 states have internal predecessors, (1298), 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) [2022-09-20 20:52:45,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 353.0) internal successors, (1765), 5 states have internal predecessors, (1765), 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) [2022-09-20 20:52:45,772 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 353.0) internal successors, (1765), 5 states have internal predecessors, (1765), 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) [2022-09-20 20:52:45,772 INFO L175 Difference]: Start difference. First operand has 361 places, 357 transitions, 972 flow. Second operand 4 states and 1298 transitions. [2022-09-20 20:52:45,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 371 transitions, 1077 flow [2022-09-20 20:52:45,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 371 transitions, 1067 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-09-20 20:52:45,782 INFO L231 Difference]: Finished difference. Result has 358 places, 363 transitions, 1032 flow [2022-09-20 20:52:45,782 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1032, PETRI_PLACES=358, PETRI_TRANSITIONS=363} [2022-09-20 20:52:45,783 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 44 predicate places. [2022-09-20 20:52:45,783 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 363 transitions, 1032 flow [2022-09-20 20:52:45,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 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) [2022-09-20 20:52:45,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:52:45,784 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:52:45,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-09-20 20:52:45,784 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:52:45,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:52:45,785 INFO L85 PathProgramCache]: Analyzing trace with hash 497553354, now seen corresponding path program 1 times [2022-09-20 20:52:45,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:52:45,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433139760] [2022-09-20 20:52:45,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:52:45,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:52:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:52:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 20:52:45,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:52:45,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433139760] [2022-09-20 20:52:45,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433139760] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:52:45,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:52:45,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-09-20 20:52:45,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217115951] [2022-09-20 20:52:45,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:52:45,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-20 20:52:45,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:52:45,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-20 20:52:45,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-20 20:52:45,845 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 353 [2022-09-20 20:52:45,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 363 transitions, 1032 flow. Second operand has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 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) [2022-09-20 20:52:45,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:52:45,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 353 [2022-09-20 20:52:45,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:52:46,180 INFO L130 PetriNetUnfolder]: 178/2081 cut-off events. [2022-09-20 20:52:46,181 INFO L131 PetriNetUnfolder]: For 169/305 co-relation queries the response was YES. [2022-09-20 20:52:46,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2879 conditions, 2081 events. 178/2081 cut-off events. For 169/305 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 14292 event pairs, 37 based on Foata normal form. 10/1960 useless extension candidates. Maximal degree in co-relation 2854. Up to 136 conditions per place. [2022-09-20 20:52:46,208 INFO L137 encePairwiseOnDemand]: 348/353 looper letters, 35 selfloop transitions, 4 changer transitions 0/372 dead transitions. [2022-09-20 20:52:46,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 372 transitions, 1135 flow [2022-09-20 20:52:46,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-20 20:52:46,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-20 20:52:46,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1611 transitions. [2022-09-20 20:52:46,212 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9127478753541076 [2022-09-20 20:52:46,212 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1611 transitions. [2022-09-20 20:52:46,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1611 transitions. [2022-09-20 20:52:46,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:52:46,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1611 transitions. [2022-09-20 20:52:46,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 322.2) internal successors, (1611), 5 states have internal predecessors, (1611), 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) [2022-09-20 20:52:46,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 353.0) internal successors, (2118), 6 states have internal predecessors, (2118), 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) [2022-09-20 20:52:46,218 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 353.0) internal successors, (2118), 6 states have internal predecessors, (2118), 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) [2022-09-20 20:52:46,218 INFO L175 Difference]: Start difference. First operand has 358 places, 363 transitions, 1032 flow. Second operand 5 states and 1611 transitions. [2022-09-20 20:52:46,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 372 transitions, 1135 flow [2022-09-20 20:52:46,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 372 transitions, 1133 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-09-20 20:52:46,228 INFO L231 Difference]: Finished difference. Result has 363 places, 363 transitions, 1044 flow [2022-09-20 20:52:46,229 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1044, PETRI_PLACES=363, PETRI_TRANSITIONS=363} [2022-09-20 20:52:46,229 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 49 predicate places. [2022-09-20 20:52:46,229 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 363 transitions, 1044 flow [2022-09-20 20:52:46,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 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) [2022-09-20 20:52:46,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:52:46,230 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:52:46,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-09-20 20:52:46,230 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:52:46,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:52:46,231 INFO L85 PathProgramCache]: Analyzing trace with hash -5692377, now seen corresponding path program 1 times [2022-09-20 20:52:46,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:52:46,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122417728] [2022-09-20 20:52:46,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:52:46,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:52:46,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:52:46,284 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 20:52:46,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:52:46,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122417728] [2022-09-20 20:52:46,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122417728] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:52:46,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:52:46,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-09-20 20:52:46,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141658235] [2022-09-20 20:52:46,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:52:46,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-20 20:52:46,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:52:46,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-20 20:52:46,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-20 20:52:46,287 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 353 [2022-09-20 20:52:46,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 363 transitions, 1044 flow. Second operand has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 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) [2022-09-20 20:52:46,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:52:46,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 353 [2022-09-20 20:52:46,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:52:46,713 INFO L130 PetriNetUnfolder]: 278/2752 cut-off events. [2022-09-20 20:52:46,713 INFO L131 PetriNetUnfolder]: For 431/442 co-relation queries the response was YES. [2022-09-20 20:52:46,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3840 conditions, 2752 events. 278/2752 cut-off events. For 431/442 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 20581 event pairs, 84 based on Foata normal form. 5/2500 useless extension candidates. Maximal degree in co-relation 3813. Up to 292 conditions per place. [2022-09-20 20:52:46,743 INFO L137 encePairwiseOnDemand]: 348/353 looper letters, 34 selfloop transitions, 4 changer transitions 0/371 dead transitions. [2022-09-20 20:52:46,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 371 transitions, 1142 flow [2022-09-20 20:52:46,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-20 20:52:46,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-20 20:52:46,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1610 transitions. [2022-09-20 20:52:46,747 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9121813031161473 [2022-09-20 20:52:46,747 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1610 transitions. [2022-09-20 20:52:46,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1610 transitions. [2022-09-20 20:52:46,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:52:46,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1610 transitions. [2022-09-20 20:52:46,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 322.0) internal successors, (1610), 5 states have internal predecessors, (1610), 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) [2022-09-20 20:52:46,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 353.0) internal successors, (2118), 6 states have internal predecessors, (2118), 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) [2022-09-20 20:52:46,754 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 353.0) internal successors, (2118), 6 states have internal predecessors, (2118), 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) [2022-09-20 20:52:46,754 INFO L175 Difference]: Start difference. First operand has 363 places, 363 transitions, 1044 flow. Second operand 5 states and 1610 transitions. [2022-09-20 20:52:46,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 371 transitions, 1142 flow [2022-09-20 20:52:46,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 371 transitions, 1134 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-09-20 20:52:46,764 INFO L231 Difference]: Finished difference. Result has 366 places, 363 transitions, 1050 flow [2022-09-20 20:52:46,765 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1050, PETRI_PLACES=366, PETRI_TRANSITIONS=363} [2022-09-20 20:52:46,765 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 52 predicate places. [2022-09-20 20:52:46,765 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 363 transitions, 1050 flow [2022-09-20 20:52:46,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 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) [2022-09-20 20:52:46,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:52:46,766 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:52:46,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-09-20 20:52:46,767 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:52:46,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:52:46,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1607751044, now seen corresponding path program 1 times [2022-09-20 20:52:46,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:52:46,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722502010] [2022-09-20 20:52:46,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:52:46,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:52:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:52:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 20:52:46,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:52:46,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722502010] [2022-09-20 20:52:46,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722502010] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:52:46,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:52:46,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-09-20 20:52:46,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334812270] [2022-09-20 20:52:46,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:52:46,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-20 20:52:46,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:52:46,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-20 20:52:46,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-20 20:52:46,817 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 353 [2022-09-20 20:52:46,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 363 transitions, 1050 flow. Second operand has 4 states, 4 states have (on average 319.25) internal successors, (1277), 4 states have internal predecessors, (1277), 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) [2022-09-20 20:52:46,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:52:46,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 353 [2022-09-20 20:52:46,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:52:47,129 INFO L130 PetriNetUnfolder]: 191/2071 cut-off events. [2022-09-20 20:52:47,129 INFO L131 PetriNetUnfolder]: For 223/461 co-relation queries the response was YES. [2022-09-20 20:52:47,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2959 conditions, 2071 events. 191/2071 cut-off events. For 223/461 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 13970 event pairs, 43 based on Foata normal form. 23/1965 useless extension candidates. Maximal degree in co-relation 2932. Up to 162 conditions per place. [2022-09-20 20:52:47,163 INFO L137 encePairwiseOnDemand]: 347/353 looper letters, 34 selfloop transitions, 6 changer transitions 0/374 dead transitions. [2022-09-20 20:52:47,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 374 transitions, 1169 flow [2022-09-20 20:52:47,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-20 20:52:47,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-20 20:52:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1609 transitions. [2022-09-20 20:52:47,167 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.911614730878187 [2022-09-20 20:52:47,167 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1609 transitions. [2022-09-20 20:52:47,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1609 transitions. [2022-09-20 20:52:47,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:52:47,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1609 transitions. [2022-09-20 20:52:47,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 321.8) internal successors, (1609), 5 states have internal predecessors, (1609), 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) [2022-09-20 20:52:47,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 353.0) internal successors, (2118), 6 states have internal predecessors, (2118), 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) [2022-09-20 20:52:47,174 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 353.0) internal successors, (2118), 6 states have internal predecessors, (2118), 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) [2022-09-20 20:52:47,174 INFO L175 Difference]: Start difference. First operand has 366 places, 363 transitions, 1050 flow. Second operand 5 states and 1609 transitions. [2022-09-20 20:52:47,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 374 transitions, 1169 flow [2022-09-20 20:52:47,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 374 transitions, 1163 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-09-20 20:52:47,185 INFO L231 Difference]: Finished difference. Result has 371 places, 368 transitions, 1104 flow [2022-09-20 20:52:47,185 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1104, PETRI_PLACES=371, PETRI_TRANSITIONS=368} [2022-09-20 20:52:47,186 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 57 predicate places. [2022-09-20 20:52:47,186 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 368 transitions, 1104 flow [2022-09-20 20:52:47,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 319.25) internal successors, (1277), 4 states have internal predecessors, (1277), 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) [2022-09-20 20:52:47,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:52:47,187 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:52:47,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-09-20 20:52:47,189 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:52:47,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:52:47,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1952346162, now seen corresponding path program 1 times [2022-09-20 20:52:47,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:52:47,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135061850] [2022-09-20 20:52:47,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:52:47,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:52:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:52:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 20:52:47,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:52:47,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135061850] [2022-09-20 20:52:47,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135061850] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:52:47,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:52:47,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 20:52:47,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539252569] [2022-09-20 20:52:47,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:52:47,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 20:52:47,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:52:47,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 20:52:47,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 20:52:47,236 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 353 [2022-09-20 20:52:47,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 368 transitions, 1104 flow. Second operand has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 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) [2022-09-20 20:52:47,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:52:47,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 353 [2022-09-20 20:52:47,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:52:48,314 INFO L130 PetriNetUnfolder]: 966/8612 cut-off events. [2022-09-20 20:52:48,315 INFO L131 PetriNetUnfolder]: For 1537/1556 co-relation queries the response was YES. [2022-09-20 20:52:48,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12314 conditions, 8612 events. 966/8612 cut-off events. For 1537/1556 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 91075 event pairs, 276 based on Foata normal form. 0/7923 useless extension candidates. Maximal degree in co-relation 12285. Up to 728 conditions per place. [2022-09-20 20:52:48,478 INFO L137 encePairwiseOnDemand]: 349/353 looper letters, 52 selfloop transitions, 3 changer transitions 0/386 dead transitions. [2022-09-20 20:52:48,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 386 transitions, 1273 flow [2022-09-20 20:52:48,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 20:52:48,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 20:52:48,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 970 transitions. [2022-09-20 20:52:48,481 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9159584513692163 [2022-09-20 20:52:48,481 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 970 transitions. [2022-09-20 20:52:48,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 970 transitions. [2022-09-20 20:52:48,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:52:48,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 970 transitions. [2022-09-20 20:52:48,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 323.3333333333333) internal successors, (970), 3 states have internal predecessors, (970), 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) [2022-09-20 20:52:48,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 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) [2022-09-20 20:52:48,485 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 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) [2022-09-20 20:52:48,485 INFO L175 Difference]: Start difference. First operand has 371 places, 368 transitions, 1104 flow. Second operand 3 states and 970 transitions. [2022-09-20 20:52:48,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 386 transitions, 1273 flow [2022-09-20 20:52:48,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 386 transitions, 1269 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-09-20 20:52:48,503 INFO L231 Difference]: Finished difference. Result has 374 places, 370 transitions, 1122 flow [2022-09-20 20:52:48,504 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1122, PETRI_PLACES=374, PETRI_TRANSITIONS=370} [2022-09-20 20:52:48,505 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 60 predicate places. [2022-09-20 20:52:48,505 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 370 transitions, 1122 flow [2022-09-20 20:52:48,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 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) [2022-09-20 20:52:48,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:52:48,506 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:52:48,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-09-20 20:52:48,506 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:52:48,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:52:48,506 INFO L85 PathProgramCache]: Analyzing trace with hash 669293166, now seen corresponding path program 1 times [2022-09-20 20:52:48,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:52:48,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671134079] [2022-09-20 20:52:48,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:52:48,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:52:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:52:48,582 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-09-20 20:52:48,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:52:48,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671134079] [2022-09-20 20:52:48,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671134079] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:52:48,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:52:48,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-09-20 20:52:48,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546401469] [2022-09-20 20:52:48,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:52:48,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-20 20:52:48,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:52:48,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-20 20:52:48,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-09-20 20:52:48,588 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 353 [2022-09-20 20:52:48,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 370 transitions, 1122 flow. Second operand has 7 states, 7 states have (on average 314.7142857142857) internal successors, (2203), 7 states have internal predecessors, (2203), 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) [2022-09-20 20:52:48,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:52:48,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 353 [2022-09-20 20:52:48,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:52:49,149 INFO L130 PetriNetUnfolder]: 298/3379 cut-off events. [2022-09-20 20:52:49,149 INFO L131 PetriNetUnfolder]: For 378/1206 co-relation queries the response was YES. [2022-09-20 20:52:49,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4998 conditions, 3379 events. 298/3379 cut-off events. For 378/1206 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 27665 event pairs, 40 based on Foata normal form. 22/3228 useless extension candidates. Maximal degree in co-relation 4968. Up to 315 conditions per place. [2022-09-20 20:52:49,182 INFO L137 encePairwiseOnDemand]: 337/353 looper letters, 40 selfloop transitions, 17 changer transitions 0/396 dead transitions. [2022-09-20 20:52:49,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 396 transitions, 1306 flow [2022-09-20 20:52:49,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-09-20 20:52:49,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-09-20 20:52:49,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2551 transitions. [2022-09-20 20:52:49,189 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9033286118980169 [2022-09-20 20:52:49,189 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2551 transitions. [2022-09-20 20:52:49,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2551 transitions. [2022-09-20 20:52:49,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:52:49,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2551 transitions. [2022-09-20 20:52:49,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 318.875) internal successors, (2551), 8 states have internal predecessors, (2551), 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) [2022-09-20 20:52:49,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 353.0) internal successors, (3177), 9 states have internal predecessors, (3177), 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) [2022-09-20 20:52:49,201 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 353.0) internal successors, (3177), 9 states have internal predecessors, (3177), 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) [2022-09-20 20:52:49,201 INFO L175 Difference]: Start difference. First operand has 374 places, 370 transitions, 1122 flow. Second operand 8 states and 2551 transitions. [2022-09-20 20:52:49,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 396 transitions, 1306 flow [2022-09-20 20:52:49,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 396 transitions, 1300 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-09-20 20:52:49,214 INFO L231 Difference]: Finished difference. Result has 383 places, 380 transitions, 1225 flow [2022-09-20 20:52:49,215 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1225, PETRI_PLACES=383, PETRI_TRANSITIONS=380} [2022-09-20 20:52:49,215 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 69 predicate places. [2022-09-20 20:52:49,215 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 380 transitions, 1225 flow [2022-09-20 20:52:49,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 314.7142857142857) internal successors, (2203), 7 states have internal predecessors, (2203), 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) [2022-09-20 20:52:49,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:52:49,216 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:52:49,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-09-20 20:52:49,217 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:52:49,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:52:49,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1622023076, now seen corresponding path program 1 times [2022-09-20 20:52:49,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:52:49,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480295606] [2022-09-20 20:52:49,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:52:49,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:52:49,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:52:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 20:52:49,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:52:49,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480295606] [2022-09-20 20:52:49,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480295606] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:52:49,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:52:49,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 20:52:49,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374053832] [2022-09-20 20:52:49,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:52:49,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 20:52:49,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:52:49,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 20:52:49,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-09-20 20:52:49,272 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 353 [2022-09-20 20:52:49,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 380 transitions, 1225 flow. Second operand has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 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) [2022-09-20 20:52:49,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:52:49,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 353 [2022-09-20 20:52:49,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:52:49,818 INFO L130 PetriNetUnfolder]: 293/3257 cut-off events. [2022-09-20 20:52:49,818 INFO L131 PetriNetUnfolder]: For 537/1332 co-relation queries the response was YES. [2022-09-20 20:52:49,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5010 conditions, 3257 events. 293/3257 cut-off events. For 537/1332 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 25918 event pairs, 68 based on Foata normal form. 22/3108 useless extension candidates. Maximal degree in co-relation 4976. Up to 251 conditions per place. [2022-09-20 20:52:49,853 INFO L137 encePairwiseOnDemand]: 343/353 looper letters, 42 selfloop transitions, 12 changer transitions 0/397 dead transitions. [2022-09-20 20:52:49,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 397 transitions, 1384 flow [2022-09-20 20:52:49,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-20 20:52:49,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-20 20:52:49,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2239 transitions. [2022-09-20 20:52:49,859 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9061108862808579 [2022-09-20 20:52:49,859 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2239 transitions. [2022-09-20 20:52:49,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2239 transitions. [2022-09-20 20:52:49,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:52:49,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2239 transitions. [2022-09-20 20:52:49,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 319.85714285714283) internal successors, (2239), 7 states have internal predecessors, (2239), 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) [2022-09-20 20:52:49,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 353.0) internal successors, (2824), 8 states have internal predecessors, (2824), 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) [2022-09-20 20:52:49,869 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 353.0) internal successors, (2824), 8 states have internal predecessors, (2824), 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) [2022-09-20 20:52:49,869 INFO L175 Difference]: Start difference. First operand has 383 places, 380 transitions, 1225 flow. Second operand 7 states and 2239 transitions. [2022-09-20 20:52:49,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 397 transitions, 1384 flow [2022-09-20 20:52:49,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 397 transitions, 1371 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-09-20 20:52:49,883 INFO L231 Difference]: Finished difference. Result has 388 places, 384 transitions, 1275 flow [2022-09-20 20:52:49,883 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1275, PETRI_PLACES=388, PETRI_TRANSITIONS=384} [2022-09-20 20:52:49,884 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 74 predicate places. [2022-09-20 20:52:49,884 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 384 transitions, 1275 flow [2022-09-20 20:52:49,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 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) [2022-09-20 20:52:49,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:52:49,885 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:52:49,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-09-20 20:52:49,885 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:52:49,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:52:49,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1128091574, now seen corresponding path program 1 times [2022-09-20 20:52:49,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:52:49,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438235232] [2022-09-20 20:52:49,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:52:49,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:52:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:52:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 20:52:49,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:52:49,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438235232] [2022-09-20 20:52:49,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438235232] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:52:49,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:52:49,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-09-20 20:52:49,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944995637] [2022-09-20 20:52:49,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:52:49,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 20:52:49,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:52:49,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 20:52:49,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-09-20 20:52:49,948 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 353 [2022-09-20 20:52:49,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 384 transitions, 1275 flow. Second operand has 6 states, 6 states have (on average 316.8333333333333) internal successors, (1901), 6 states have internal predecessors, (1901), 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) [2022-09-20 20:52:49,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:52:49,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 353 [2022-09-20 20:52:49,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:52:50,655 INFO L130 PetriNetUnfolder]: 368/4154 cut-off events. [2022-09-20 20:52:50,655 INFO L131 PetriNetUnfolder]: For 892/1717 co-relation queries the response was YES. [2022-09-20 20:52:50,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6605 conditions, 4154 events. 368/4154 cut-off events. For 892/1717 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 35092 event pairs, 85 based on Foata normal form. 42/3975 useless extension candidates. Maximal degree in co-relation 6569. Up to 404 conditions per place. [2022-09-20 20:52:50,705 INFO L137 encePairwiseOnDemand]: 341/353 looper letters, 49 selfloop transitions, 13 changer transitions 0/408 dead transitions. [2022-09-20 20:52:50,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 408 transitions, 1488 flow [2022-09-20 20:52:50,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-20 20:52:50,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-20 20:52:50,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2248 transitions. [2022-09-20 20:52:50,710 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9097531363820316 [2022-09-20 20:52:50,711 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2248 transitions. [2022-09-20 20:52:50,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2248 transitions. [2022-09-20 20:52:50,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:52:50,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2248 transitions. [2022-09-20 20:52:50,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 321.14285714285717) internal successors, (2248), 7 states have internal predecessors, (2248), 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) [2022-09-20 20:52:50,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 353.0) internal successors, (2824), 8 states have internal predecessors, (2824), 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) [2022-09-20 20:52:50,720 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 353.0) internal successors, (2824), 8 states have internal predecessors, (2824), 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) [2022-09-20 20:52:50,720 INFO L175 Difference]: Start difference. First operand has 388 places, 384 transitions, 1275 flow. Second operand 7 states and 2248 transitions. [2022-09-20 20:52:50,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 408 transitions, 1488 flow [2022-09-20 20:52:50,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 408 transitions, 1474 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-09-20 20:52:50,736 INFO L231 Difference]: Finished difference. Result has 397 places, 394 transitions, 1374 flow [2022-09-20 20:52:50,737 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1374, PETRI_PLACES=397, PETRI_TRANSITIONS=394} [2022-09-20 20:52:50,737 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 83 predicate places. [2022-09-20 20:52:50,737 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 394 transitions, 1374 flow [2022-09-20 20:52:50,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 316.8333333333333) internal successors, (1901), 6 states have internal predecessors, (1901), 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) [2022-09-20 20:52:50,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:52:50,738 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:52:50,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-09-20 20:52:50,738 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:52:50,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:52:50,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1682436701, now seen corresponding path program 1 times [2022-09-20 20:52:50,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:52:50,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257156070] [2022-09-20 20:52:50,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:52:50,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:52:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:52:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 20:52:50,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:52:50,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257156070] [2022-09-20 20:52:50,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257156070] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:52:50,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:52:50,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-09-20 20:52:50,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645828000] [2022-09-20 20:52:50,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:52:50,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-20 20:52:50,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:52:50,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-20 20:52:50,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-20 20:52:50,791 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 353 [2022-09-20 20:52:50,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 394 transitions, 1374 flow. Second operand has 4 states, 4 states have (on average 319.25) internal successors, (1277), 4 states have internal predecessors, (1277), 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) [2022-09-20 20:52:50,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:52:50,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 353 [2022-09-20 20:52:50,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:52:51,805 INFO L130 PetriNetUnfolder]: 800/7313 cut-off events. [2022-09-20 20:52:51,805 INFO L131 PetriNetUnfolder]: For 2197/2218 co-relation queries the response was YES. [2022-09-20 20:52:51,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11533 conditions, 7313 events. 800/7313 cut-off events. For 2197/2218 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 76852 event pairs, 319 based on Foata normal form. 38/6589 useless extension candidates. Maximal degree in co-relation 11491. Up to 869 conditions per place. [2022-09-20 20:52:51,890 INFO L137 encePairwiseOnDemand]: 347/353 looper letters, 34 selfloop transitions, 6 changer transitions 0/405 dead transitions. [2022-09-20 20:52:51,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 405 transitions, 1493 flow [2022-09-20 20:52:51,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-20 20:52:51,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-20 20:52:51,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1609 transitions. [2022-09-20 20:52:51,894 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.911614730878187 [2022-09-20 20:52:51,894 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1609 transitions. [2022-09-20 20:52:51,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1609 transitions. [2022-09-20 20:52:51,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:52:51,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1609 transitions. [2022-09-20 20:52:51,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 321.8) internal successors, (1609), 5 states have internal predecessors, (1609), 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) [2022-09-20 20:52:51,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 353.0) internal successors, (2118), 6 states have internal predecessors, (2118), 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) [2022-09-20 20:52:51,902 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 353.0) internal successors, (2118), 6 states have internal predecessors, (2118), 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) [2022-09-20 20:52:51,902 INFO L175 Difference]: Start difference. First operand has 397 places, 394 transitions, 1374 flow. Second operand 5 states and 1609 transitions. [2022-09-20 20:52:51,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 405 transitions, 1493 flow [2022-09-20 20:52:51,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 405 transitions, 1487 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-09-20 20:52:51,926 INFO L231 Difference]: Finished difference. Result has 404 places, 399 transitions, 1428 flow [2022-09-20 20:52:51,927 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1368, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1428, PETRI_PLACES=404, PETRI_TRANSITIONS=399} [2022-09-20 20:52:51,927 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 90 predicate places. [2022-09-20 20:52:51,927 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 399 transitions, 1428 flow [2022-09-20 20:52:51,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 319.25) internal successors, (1277), 4 states have internal predecessors, (1277), 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) [2022-09-20 20:52:51,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:52:51,928 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:52:51,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-09-20 20:52:51,928 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:52:51,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:52:51,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1031198601, now seen corresponding path program 1 times [2022-09-20 20:52:51,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:52:51,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323944749] [2022-09-20 20:52:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:52:51,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:52:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:52:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 20:52:51,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:52:51,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323944749] [2022-09-20 20:52:51,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323944749] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:52:51,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:52:51,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-09-20 20:52:51,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133065385] [2022-09-20 20:52:51,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:52:51,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-20 20:52:51,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:52:51,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-20 20:52:51,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-09-20 20:52:51,989 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 353 [2022-09-20 20:52:51,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 399 transitions, 1428 flow. Second operand has 7 states, 7 states have (on average 297.85714285714283) internal successors, (2085), 7 states have internal predecessors, (2085), 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) [2022-09-20 20:52:51,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:52:51,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 353 [2022-09-20 20:52:51,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:52:57,010 INFO L130 PetriNetUnfolder]: 6653/28793 cut-off events. [2022-09-20 20:52:57,010 INFO L131 PetriNetUnfolder]: For 24331/24910 co-relation queries the response was YES. [2022-09-20 20:52:57,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59289 conditions, 28793 events. 6653/28793 cut-off events. For 24331/24910 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 357190 event pairs, 2359 based on Foata normal form. 432/27142 useless extension candidates. Maximal degree in co-relation 59243. Up to 6081 conditions per place. [2022-09-20 20:52:57,245 INFO L137 encePairwiseOnDemand]: 338/353 looper letters, 278 selfloop transitions, 79 changer transitions 0/687 dead transitions. [2022-09-20 20:52:57,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 687 transitions, 3600 flow [2022-09-20 20:52:57,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-09-20 20:52:57,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-09-20 20:52:57,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 7644 transitions. [2022-09-20 20:52:57,259 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8661756373937677 [2022-09-20 20:52:57,259 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 7644 transitions. [2022-09-20 20:52:57,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 7644 transitions. [2022-09-20 20:52:57,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:52:57,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 7644 transitions. [2022-09-20 20:52:57,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 305.76) internal successors, (7644), 25 states have internal predecessors, (7644), 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) [2022-09-20 20:52:57,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 353.0) internal successors, (9178), 26 states have internal predecessors, (9178), 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) [2022-09-20 20:52:57,286 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 353.0) internal successors, (9178), 26 states have internal predecessors, (9178), 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) [2022-09-20 20:52:57,286 INFO L175 Difference]: Start difference. First operand has 404 places, 399 transitions, 1428 flow. Second operand 25 states and 7644 transitions. [2022-09-20 20:52:57,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 687 transitions, 3600 flow [2022-09-20 20:52:57,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 687 transitions, 3580 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-09-20 20:52:57,438 INFO L231 Difference]: Finished difference. Result has 439 places, 465 transitions, 2118 flow [2022-09-20 20:52:57,439 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2118, PETRI_PLACES=439, PETRI_TRANSITIONS=465} [2022-09-20 20:52:57,439 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 125 predicate places. [2022-09-20 20:52:57,440 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 465 transitions, 2118 flow [2022-09-20 20:52:57,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 297.85714285714283) internal successors, (2085), 7 states have internal predecessors, (2085), 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) [2022-09-20 20:52:57,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:52:57,440 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:52:57,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-09-20 20:52:57,441 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:52:57,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:52:57,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1460276421, now seen corresponding path program 1 times [2022-09-20 20:52:57,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:52:57,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309043943] [2022-09-20 20:52:57,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:52:57,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:52:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:52:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-09-20 20:52:57,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:52:57,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309043943] [2022-09-20 20:52:57,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309043943] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:52:57,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:52:57,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-09-20 20:52:57,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387789324] [2022-09-20 20:52:57,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:52:57,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-20 20:52:57,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:52:57,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-20 20:52:57,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-09-20 20:52:57,509 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 353 [2022-09-20 20:52:57,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 465 transitions, 2118 flow. Second operand has 7 states, 7 states have (on average 314.7142857142857) internal successors, (2203), 7 states have internal predecessors, (2203), 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) [2022-09-20 20:52:57,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:52:57,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 353 [2022-09-20 20:52:57,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:52:59,410 INFO L130 PetriNetUnfolder]: 1226/10175 cut-off events. [2022-09-20 20:52:59,411 INFO L131 PetriNetUnfolder]: For 7755/7903 co-relation queries the response was YES. [2022-09-20 20:52:59,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18677 conditions, 10175 events. 1226/10175 cut-off events. For 7755/7903 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 118621 event pairs, 373 based on Foata normal form. 28/9190 useless extension candidates. Maximal degree in co-relation 18620. Up to 1225 conditions per place. [2022-09-20 20:52:59,628 INFO L137 encePairwiseOnDemand]: 337/353 looper letters, 39 selfloop transitions, 17 changer transitions 0/490 dead transitions. [2022-09-20 20:52:59,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 490 transitions, 2297 flow [2022-09-20 20:52:59,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-09-20 20:52:59,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-09-20 20:52:59,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2550 transitions. [2022-09-20 20:52:59,632 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9029745042492918 [2022-09-20 20:52:59,632 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2550 transitions. [2022-09-20 20:52:59,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2550 transitions. [2022-09-20 20:52:59,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:52:59,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2550 transitions. [2022-09-20 20:52:59,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 318.75) internal successors, (2550), 8 states have internal predecessors, (2550), 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) [2022-09-20 20:52:59,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 353.0) internal successors, (3177), 9 states have internal predecessors, (3177), 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) [2022-09-20 20:52:59,639 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 353.0) internal successors, (3177), 9 states have internal predecessors, (3177), 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) [2022-09-20 20:52:59,639 INFO L175 Difference]: Start difference. First operand has 439 places, 465 transitions, 2118 flow. Second operand 8 states and 2550 transitions. [2022-09-20 20:52:59,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 490 transitions, 2297 flow [2022-09-20 20:52:59,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 490 transitions, 2225 flow, removed 7 selfloop flow, removed 5 redundant places. [2022-09-20 20:52:59,701 INFO L231 Difference]: Finished difference. Result has 445 places, 475 transitions, 2155 flow [2022-09-20 20:52:59,701 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=2046, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2155, PETRI_PLACES=445, PETRI_TRANSITIONS=475} [2022-09-20 20:52:59,702 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 131 predicate places. [2022-09-20 20:52:59,702 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 475 transitions, 2155 flow [2022-09-20 20:52:59,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 314.7142857142857) internal successors, (2203), 7 states have internal predecessors, (2203), 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) [2022-09-20 20:52:59,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:52:59,703 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:52:59,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-09-20 20:52:59,703 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:52:59,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:52:59,703 INFO L85 PathProgramCache]: Analyzing trace with hash 983312573, now seen corresponding path program 1 times [2022-09-20 20:52:59,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:52:59,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952891832] [2022-09-20 20:52:59,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:52:59,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:52:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:52:59,756 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 20:52:59,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:52:59,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952891832] [2022-09-20 20:52:59,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952891832] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:52:59,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:52:59,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 20:52:59,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153818344] [2022-09-20 20:52:59,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:52:59,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 20:52:59,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:52:59,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 20:52:59,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 20:52:59,759 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 353 [2022-09-20 20:52:59,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 475 transitions, 2155 flow. Second operand has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 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) [2022-09-20 20:52:59,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:52:59,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 353 [2022-09-20 20:52:59,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:53:04,911 INFO L130 PetriNetUnfolder]: 3236/27715 cut-off events. [2022-09-20 20:53:04,911 INFO L131 PetriNetUnfolder]: For 21457/22759 co-relation queries the response was YES. [2022-09-20 20:53:05,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50898 conditions, 27715 events. 3236/27715 cut-off events. For 21457/22759 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 387282 event pairs, 1285 based on Foata normal form. 50/25723 useless extension candidates. Maximal degree in co-relation 50836. Up to 3021 conditions per place. [2022-09-20 20:53:05,342 INFO L137 encePairwiseOnDemand]: 349/353 looper letters, 51 selfloop transitions, 3 changer transitions 0/492 dead transitions. [2022-09-20 20:53:05,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 492 transitions, 2323 flow [2022-09-20 20:53:05,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 20:53:05,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 20:53:05,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 969 transitions. [2022-09-20 20:53:05,344 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9150141643059491 [2022-09-20 20:53:05,344 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 969 transitions. [2022-09-20 20:53:05,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 969 transitions. [2022-09-20 20:53:05,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:53:05,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 969 transitions. [2022-09-20 20:53:05,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:53:05,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 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) [2022-09-20 20:53:05,348 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 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) [2022-09-20 20:53:05,348 INFO L175 Difference]: Start difference. First operand has 445 places, 475 transitions, 2155 flow. Second operand 3 states and 969 transitions. [2022-09-20 20:53:05,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 492 transitions, 2323 flow [2022-09-20 20:53:05,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 492 transitions, 2310 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-09-20 20:53:05,591 INFO L231 Difference]: Finished difference. Result has 446 places, 477 transitions, 2164 flow [2022-09-20 20:53:05,592 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=2142, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2164, PETRI_PLACES=446, PETRI_TRANSITIONS=477} [2022-09-20 20:53:05,592 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 132 predicate places. [2022-09-20 20:53:05,592 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 477 transitions, 2164 flow [2022-09-20 20:53:05,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 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) [2022-09-20 20:53:05,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:53:05,593 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:53:05,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-09-20 20:53:05,593 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:53:05,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:53:05,594 INFO L85 PathProgramCache]: Analyzing trace with hash -57934525, now seen corresponding path program 1 times [2022-09-20 20:53:05,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:53:05,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875254561] [2022-09-20 20:53:05,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:53:05,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:53:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:53:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 20:53:05,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:53:05,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875254561] [2022-09-20 20:53:05,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875254561] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:53:05,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:53:05,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-09-20 20:53:05,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418343853] [2022-09-20 20:53:05,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:53:05,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 20:53:05,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:53:05,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 20:53:05,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-09-20 20:53:05,684 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 353 [2022-09-20 20:53:05,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 477 transitions, 2164 flow. Second operand has 6 states, 6 states have (on average 316.8333333333333) internal successors, (1901), 6 states have internal predecessors, (1901), 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) [2022-09-20 20:53:05,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:53:05,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 353 [2022-09-20 20:53:05,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:53:09,507 INFO L130 PetriNetUnfolder]: 1956/18106 cut-off events. [2022-09-20 20:53:09,507 INFO L131 PetriNetUnfolder]: For 12229/12435 co-relation queries the response was YES. [2022-09-20 20:53:09,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33236 conditions, 18106 events. 1956/18106 cut-off events. For 12229/12435 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 240248 event pairs, 676 based on Foata normal form. 107/16691 useless extension candidates. Maximal degree in co-relation 33173. Up to 2374 conditions per place. [2022-09-20 20:53:09,710 INFO L137 encePairwiseOnDemand]: 341/353 looper letters, 48 selfloop transitions, 13 changer transitions 0/500 dead transitions. [2022-09-20 20:53:09,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 500 transitions, 2372 flow [2022-09-20 20:53:09,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-20 20:53:09,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-20 20:53:09,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2247 transitions. [2022-09-20 20:53:09,713 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9093484419263456 [2022-09-20 20:53:09,713 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2247 transitions. [2022-09-20 20:53:09,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2247 transitions. [2022-09-20 20:53:09,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:53:09,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2247 transitions. [2022-09-20 20:53:09,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 321.0) internal successors, (2247), 7 states have internal predecessors, (2247), 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) [2022-09-20 20:53:09,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 353.0) internal successors, (2824), 8 states have internal predecessors, (2824), 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) [2022-09-20 20:53:09,719 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 353.0) internal successors, (2824), 8 states have internal predecessors, (2824), 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) [2022-09-20 20:53:09,719 INFO L175 Difference]: Start difference. First operand has 446 places, 477 transitions, 2164 flow. Second operand 7 states and 2247 transitions. [2022-09-20 20:53:09,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 500 transitions, 2372 flow [2022-09-20 20:53:09,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 500 transitions, 2366 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-09-20 20:53:09,826 INFO L231 Difference]: Finished difference. Result has 455 places, 487 transitions, 2271 flow [2022-09-20 20:53:09,827 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=2158, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2271, PETRI_PLACES=455, PETRI_TRANSITIONS=487} [2022-09-20 20:53:09,827 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 141 predicate places. [2022-09-20 20:53:09,827 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 487 transitions, 2271 flow [2022-09-20 20:53:09,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 316.8333333333333) internal successors, (1901), 6 states have internal predecessors, (1901), 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) [2022-09-20 20:53:09,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:53:09,828 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:53:09,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-09-20 20:53:09,828 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:53:09,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:53:09,829 INFO L85 PathProgramCache]: Analyzing trace with hash -83899700, now seen corresponding path program 1 times [2022-09-20 20:53:09,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:53:09,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803039427] [2022-09-20 20:53:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:53:09,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:53:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:53:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 20:53:09,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:53:09,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803039427] [2022-09-20 20:53:09,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803039427] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:53:09,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791245423] [2022-09-20 20:53:09,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:53:09,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:53:09,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:53:09,936 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) [2022-09-20 20:53:09,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-09-20 20:53:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:53:10,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 7 conjunts are in the unsatisfiable core [2022-09-20 20:53:10,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:53:10,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 20:53:10,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 20:53:10,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791245423] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:53:10,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 20:53:10,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-09-20 20:53:10,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125523283] [2022-09-20 20:53:10,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:53:10,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 20:53:10,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:53:10,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 20:53:10,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-09-20 20:53:10,134 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 353 [2022-09-20 20:53:10,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 487 transitions, 2271 flow. Second operand has 6 states, 6 states have (on average 301.0) internal successors, (1806), 6 states have internal predecessors, (1806), 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) [2022-09-20 20:53:10,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:53:10,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 353 [2022-09-20 20:53:10,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:53:11,406 INFO L130 PetriNetUnfolder]: 481/5805 cut-off events. [2022-09-20 20:53:11,406 INFO L131 PetriNetUnfolder]: For 3989/6717 co-relation queries the response was YES. [2022-09-20 20:53:11,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11051 conditions, 5805 events. 481/5805 cut-off events. For 3989/6717 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 54649 event pairs, 116 based on Foata normal form. 33/5544 useless extension candidates. Maximal degree in co-relation 10983. Up to 427 conditions per place. [2022-09-20 20:53:11,466 INFO L137 encePairwiseOnDemand]: 343/353 looper letters, 59 selfloop transitions, 25 changer transitions 0/479 dead transitions. [2022-09-20 20:53:11,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 479 transitions, 2251 flow [2022-09-20 20:53:11,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-20 20:53:11,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-20 20:53:11,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2736 transitions. [2022-09-20 20:53:11,469 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8611898016997167 [2022-09-20 20:53:11,469 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2736 transitions. [2022-09-20 20:53:11,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2736 transitions. [2022-09-20 20:53:11,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:53:11,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2736 transitions. [2022-09-20 20:53:11,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 304.0) internal successors, (2736), 9 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:53:11,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 353.0) internal successors, (3530), 10 states have internal predecessors, (3530), 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) [2022-09-20 20:53:11,474 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 353.0) internal successors, (3530), 10 states have internal predecessors, (3530), 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) [2022-09-20 20:53:11,474 INFO L175 Difference]: Start difference. First operand has 455 places, 487 transitions, 2271 flow. Second operand 9 states and 2736 transitions. [2022-09-20 20:53:11,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 479 transitions, 2251 flow [2022-09-20 20:53:11,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 479 transitions, 2164 flow, removed 23 selfloop flow, removed 12 redundant places. [2022-09-20 20:53:11,510 INFO L231 Difference]: Finished difference. Result has 453 places, 464 transitions, 2034 flow [2022-09-20 20:53:11,511 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1947, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2034, PETRI_PLACES=453, PETRI_TRANSITIONS=464} [2022-09-20 20:53:11,511 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 139 predicate places. [2022-09-20 20:53:11,511 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 464 transitions, 2034 flow [2022-09-20 20:53:11,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 301.0) internal successors, (1806), 6 states have internal predecessors, (1806), 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) [2022-09-20 20:53:11,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:53:11,512 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:53:11,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-09-20 20:53:11,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-09-20 20:53:11,728 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:53:11,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:53:11,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1350444252, now seen corresponding path program 1 times [2022-09-20 20:53:11,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:53:11,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442380635] [2022-09-20 20:53:11,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:53:11,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:53:11,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:53:11,801 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 20:53:11,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:53:11,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442380635] [2022-09-20 20:53:11,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442380635] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:53:11,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468961129] [2022-09-20 20:53:11,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:53:11,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:53:11,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:53:11,803 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) [2022-09-20 20:53:11,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-09-20 20:53:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:53:11,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 7 conjunts are in the unsatisfiable core [2022-09-20 20:53:11,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:53:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 20:53:11,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 20:53:11,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468961129] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:53:11,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 20:53:11,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-09-20 20:53:11,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156952187] [2022-09-20 20:53:11,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:53:11,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 20:53:11,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:53:11,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 20:53:11,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-09-20 20:53:11,972 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 353 [2022-09-20 20:53:11,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 464 transitions, 2034 flow. Second operand has 6 states, 6 states have (on average 301.0) internal successors, (1806), 6 states have internal predecessors, (1806), 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) [2022-09-20 20:53:11,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:53:11,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 353 [2022-09-20 20:53:11,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:53:13,296 INFO L130 PetriNetUnfolder]: 1096/6554 cut-off events. [2022-09-20 20:53:13,297 INFO L131 PetriNetUnfolder]: For 4491/4504 co-relation queries the response was YES. [2022-09-20 20:53:13,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12605 conditions, 6554 events. 1096/6554 cut-off events. For 4491/4504 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 74494 event pairs, 684 based on Foata normal form. 0/5572 useless extension candidates. Maximal degree in co-relation 12540. Up to 1695 conditions per place. [2022-09-20 20:53:13,354 INFO L137 encePairwiseOnDemand]: 343/353 looper letters, 43 selfloop transitions, 4 changer transitions 62/431 dead transitions. [2022-09-20 20:53:13,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 431 transitions, 1826 flow [2022-09-20 20:53:13,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-20 20:53:13,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-20 20:53:13,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2735 transitions. [2022-09-20 20:53:13,357 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8608750393452943 [2022-09-20 20:53:13,357 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2735 transitions. [2022-09-20 20:53:13,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2735 transitions. [2022-09-20 20:53:13,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:53:13,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2735 transitions. [2022-09-20 20:53:13,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 303.8888888888889) internal successors, (2735), 9 states have internal predecessors, (2735), 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) [2022-09-20 20:53:13,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 353.0) internal successors, (3530), 10 states have internal predecessors, (3530), 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) [2022-09-20 20:53:13,362 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 353.0) internal successors, (3530), 10 states have internal predecessors, (3530), 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) [2022-09-20 20:53:13,362 INFO L175 Difference]: Start difference. First operand has 453 places, 464 transitions, 2034 flow. Second operand 9 states and 2735 transitions. [2022-09-20 20:53:13,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 431 transitions, 1826 flow [2022-09-20 20:53:13,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 431 transitions, 1685 flow, removed 42 selfloop flow, removed 21 redundant places. [2022-09-20 20:53:13,386 INFO L231 Difference]: Finished difference. Result has 435 places, 369 transitions, 1222 flow [2022-09-20 20:53:13,386 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1489, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1222, PETRI_PLACES=435, PETRI_TRANSITIONS=369} [2022-09-20 20:53:13,387 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 121 predicate places. [2022-09-20 20:53:13,387 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 369 transitions, 1222 flow [2022-09-20 20:53:13,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 301.0) internal successors, (1806), 6 states have internal predecessors, (1806), 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) [2022-09-20 20:53:13,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:53:13,387 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:53:13,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-09-20 20:53:13,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:53:13,594 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:53:13,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:53:13,594 INFO L85 PathProgramCache]: Analyzing trace with hash -118888444, now seen corresponding path program 1 times [2022-09-20 20:53:13,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:53:13,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496137666] [2022-09-20 20:53:13,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:53:13,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:53:13,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:53:13,777 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 20:53:13,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:53:13,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496137666] [2022-09-20 20:53:13,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496137666] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:53:13,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:53:13,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-09-20 20:53:13,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034591933] [2022-09-20 20:53:13,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:53:13,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-09-20 20:53:13,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:53:13,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-09-20 20:53:13,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-09-20 20:53:13,781 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 353 [2022-09-20 20:53:13,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 369 transitions, 1222 flow. Second operand has 17 states, 17 states have (on average 254.94117647058823) internal successors, (4334), 17 states have internal predecessors, (4334), 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) [2022-09-20 20:53:13,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:53:13,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 353 [2022-09-20 20:53:13,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:53:25,574 INFO L130 PetriNetUnfolder]: 16942/58355 cut-off events. [2022-09-20 20:53:25,574 INFO L131 PetriNetUnfolder]: For 29667/31429 co-relation queries the response was YES. [2022-09-20 20:53:26,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122299 conditions, 58355 events. 16942/58355 cut-off events. For 29667/31429 co-relation queries the response was YES. Maximal size of possible extension queue 1178. Compared 771188 event pairs, 7521 based on Foata normal form. 1029/57586 useless extension candidates. Maximal degree in co-relation 122245. Up to 17285 conditions per place. [2022-09-20 20:53:26,529 INFO L137 encePairwiseOnDemand]: 331/353 looper letters, 502 selfloop transitions, 62 changer transitions 0/831 dead transitions. [2022-09-20 20:53:26,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 831 transitions, 4064 flow [2022-09-20 20:53:26,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-09-20 20:53:26,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-09-20 20:53:26,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 10794 transitions. [2022-09-20 20:53:26,536 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7458025288468182 [2022-09-20 20:53:26,536 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 10794 transitions. [2022-09-20 20:53:26,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 10794 transitions. [2022-09-20 20:53:26,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:53:26,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 10794 transitions. [2022-09-20 20:53:26,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 263.2682926829268) internal successors, (10794), 41 states have internal predecessors, (10794), 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) [2022-09-20 20:53:26,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 353.0) internal successors, (14826), 42 states have internal predecessors, (14826), 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) [2022-09-20 20:53:26,561 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 353.0) internal successors, (14826), 42 states have internal predecessors, (14826), 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) [2022-09-20 20:53:26,561 INFO L175 Difference]: Start difference. First operand has 435 places, 369 transitions, 1222 flow. Second operand 41 states and 10794 transitions. [2022-09-20 20:53:26,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 831 transitions, 4064 flow [2022-09-20 20:53:27,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 831 transitions, 3867 flow, removed 84 selfloop flow, removed 26 redundant places. [2022-09-20 20:53:27,223 INFO L231 Difference]: Finished difference. Result has 442 places, 424 transitions, 1599 flow [2022-09-20 20:53:27,223 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1141, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=1599, PETRI_PLACES=442, PETRI_TRANSITIONS=424} [2022-09-20 20:53:27,223 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 128 predicate places. [2022-09-20 20:53:27,223 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 424 transitions, 1599 flow [2022-09-20 20:53:27,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 254.94117647058823) internal successors, (4334), 17 states have internal predecessors, (4334), 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) [2022-09-20 20:53:27,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:53:27,224 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:53:27,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-09-20 20:53:27,224 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:53:27,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:53:27,225 INFO L85 PathProgramCache]: Analyzing trace with hash 858695370, now seen corresponding path program 2 times [2022-09-20 20:53:27,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:53:27,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442457854] [2022-09-20 20:53:27,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:53:27,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:53:27,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:53:27,400 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 20:53:27,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:53:27,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442457854] [2022-09-20 20:53:27,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442457854] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:53:27,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:53:27,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-09-20 20:53:27,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383339189] [2022-09-20 20:53:27,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:53:27,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-09-20 20:53:27,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:53:27,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-09-20 20:53:27,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-09-20 20:53:27,404 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 353 [2022-09-20 20:53:27,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 424 transitions, 1599 flow. Second operand has 17 states, 17 states have (on average 254.94117647058823) internal successors, (4334), 17 states have internal predecessors, (4334), 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) [2022-09-20 20:53:27,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:53:27,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 353 [2022-09-20 20:53:27,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:53:40,439 INFO L130 PetriNetUnfolder]: 17242/60382 cut-off events. [2022-09-20 20:53:40,439 INFO L131 PetriNetUnfolder]: For 56114/57982 co-relation queries the response was YES. [2022-09-20 20:53:41,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143782 conditions, 60382 events. 17242/60382 cut-off events. For 56114/57982 co-relation queries the response was YES. Maximal size of possible extension queue 1158. Compared 799536 event pairs, 7611 based on Foata normal form. 975/57192 useless extension candidates. Maximal degree in co-relation 143717. Up to 17252 conditions per place. [2022-09-20 20:53:41,896 INFO L137 encePairwiseOnDemand]: 331/353 looper letters, 544 selfloop transitions, 96 changer transitions 0/907 dead transitions. [2022-09-20 20:53:41,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 907 transitions, 5093 flow [2022-09-20 20:53:41,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-09-20 20:53:41,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-09-20 20:53:41,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 10787 transitions. [2022-09-20 20:53:41,902 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7453188696192911 [2022-09-20 20:53:41,903 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 10787 transitions. [2022-09-20 20:53:41,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 10787 transitions. [2022-09-20 20:53:41,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:53:41,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 10787 transitions. [2022-09-20 20:53:41,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 263.0975609756098) internal successors, (10787), 41 states have internal predecessors, (10787), 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) [2022-09-20 20:53:41,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 353.0) internal successors, (14826), 42 states have internal predecessors, (14826), 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) [2022-09-20 20:53:41,929 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 353.0) internal successors, (14826), 42 states have internal predecessors, (14826), 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) [2022-09-20 20:53:41,929 INFO L175 Difference]: Start difference. First operand has 442 places, 424 transitions, 1599 flow. Second operand 41 states and 10787 transitions. [2022-09-20 20:53:41,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 907 transitions, 5093 flow [2022-09-20 20:53:43,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 907 transitions, 4916 flow, removed 25 selfloop flow, removed 5 redundant places. [2022-09-20 20:53:43,168 INFO L231 Difference]: Finished difference. Result has 507 places, 480 transitions, 2311 flow [2022-09-20 20:53:43,168 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=1563, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=2311, PETRI_PLACES=507, PETRI_TRANSITIONS=480} [2022-09-20 20:53:43,168 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 193 predicate places. [2022-09-20 20:53:43,169 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 480 transitions, 2311 flow [2022-09-20 20:53:43,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 254.94117647058823) internal successors, (4334), 17 states have internal predecessors, (4334), 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) [2022-09-20 20:53:43,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:53:43,170 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:53:43,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-09-20 20:53:43,170 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:53:43,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:53:43,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1016144682, now seen corresponding path program 3 times [2022-09-20 20:53:43,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:53:43,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905530445] [2022-09-20 20:53:43,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:53:43,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:53:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:53:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 20:53:43,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:53:43,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905530445] [2022-09-20 20:53:43,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905530445] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:53:43,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:53:43,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-09-20 20:53:43,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039971414] [2022-09-20 20:53:43,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:53:43,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-09-20 20:53:43,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:53:43,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-09-20 20:53:43,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-09-20 20:53:43,348 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 353 [2022-09-20 20:53:43,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 480 transitions, 2311 flow. Second operand has 17 states, 17 states have (on average 254.94117647058823) internal successors, (4334), 17 states have internal predecessors, (4334), 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) [2022-09-20 20:53:43,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:53:43,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 353 [2022-09-20 20:53:43,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:53:57,945 INFO L130 PetriNetUnfolder]: 17867/62445 cut-off events. [2022-09-20 20:53:57,945 INFO L131 PetriNetUnfolder]: For 118812/120679 co-relation queries the response was YES. [2022-09-20 20:53:59,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169231 conditions, 62445 events. 17867/62445 cut-off events. For 118812/120679 co-relation queries the response was YES. Maximal size of possible extension queue 1232. Compared 834492 event pairs, 7669 based on Foata normal form. 1029/59426 useless extension candidates. Maximal degree in co-relation 169135. Up to 17285 conditions per place. [2022-09-20 20:53:59,792 INFO L137 encePairwiseOnDemand]: 331/353 looper letters, 514 selfloop transitions, 110 changer transitions 0/891 dead transitions. [2022-09-20 20:53:59,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 891 transitions, 6373 flow [2022-09-20 20:53:59,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-09-20 20:53:59,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-09-20 20:53:59,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 10500 transitions. [2022-09-20 20:53:59,801 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7436260623229461 [2022-09-20 20:53:59,801 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 10500 transitions. [2022-09-20 20:53:59,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 10500 transitions. [2022-09-20 20:53:59,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:53:59,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 10500 transitions. [2022-09-20 20:53:59,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 262.5) internal successors, (10500), 40 states have internal predecessors, (10500), 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) [2022-09-20 20:53:59,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 353.0) internal successors, (14473), 41 states have internal predecessors, (14473), 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) [2022-09-20 20:53:59,827 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 353.0) internal successors, (14473), 41 states have internal predecessors, (14473), 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) [2022-09-20 20:53:59,827 INFO L175 Difference]: Start difference. First operand has 507 places, 480 transitions, 2311 flow. Second operand 40 states and 10500 transitions. [2022-09-20 20:53:59,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 891 transitions, 6373 flow [2022-09-20 20:54:01,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 891 transitions, 5934 flow, removed 141 selfloop flow, removed 5 redundant places. [2022-09-20 20:54:01,807 INFO L231 Difference]: Finished difference. Result has 569 places, 532 transitions, 3097 flow [2022-09-20 20:54:01,807 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=2123, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=3097, PETRI_PLACES=569, PETRI_TRANSITIONS=532} [2022-09-20 20:54:01,808 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 255 predicate places. [2022-09-20 20:54:01,808 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 532 transitions, 3097 flow [2022-09-20 20:54:01,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 254.94117647058823) internal successors, (4334), 17 states have internal predecessors, (4334), 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) [2022-09-20 20:54:01,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:54:01,809 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:54:01,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-09-20 20:54:01,809 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:54:01,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:54:01,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1651880342, now seen corresponding path program 4 times [2022-09-20 20:54:01,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:54:01,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110517595] [2022-09-20 20:54:01,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:54:01,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:54:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:54:02,017 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 20:54:02,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:54:02,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110517595] [2022-09-20 20:54:02,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110517595] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:54:02,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:54:02,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-09-20 20:54:02,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040275751] [2022-09-20 20:54:02,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:54:02,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-09-20 20:54:02,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:54:02,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-09-20 20:54:02,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-09-20 20:54:02,020 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 353 [2022-09-20 20:54:02,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 532 transitions, 3097 flow. Second operand has 17 states, 17 states have (on average 254.94117647058823) internal successors, (4334), 17 states have internal predecessors, (4334), 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) [2022-09-20 20:54:02,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:54:02,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 353 [2022-09-20 20:54:02,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:54:21,271 INFO L130 PetriNetUnfolder]: 18538/66390 cut-off events. [2022-09-20 20:54:21,271 INFO L131 PetriNetUnfolder]: For 202639/204699 co-relation queries the response was YES. [2022-09-20 20:54:23,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192809 conditions, 66390 events. 18538/66390 cut-off events. For 202639/204699 co-relation queries the response was YES. Maximal size of possible extension queue 1233. Compared 894764 event pairs, 7707 based on Foata normal form. 975/62969 useless extension candidates. Maximal degree in co-relation 192684. Up to 17252 conditions per place. [2022-09-20 20:54:23,670 INFO L137 encePairwiseOnDemand]: 331/353 looper letters, 558 selfloop transitions, 135 changer transitions 0/960 dead transitions. [2022-09-20 20:54:23,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 608 places, 960 transitions, 7792 flow [2022-09-20 20:54:23,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-09-20 20:54:23,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-09-20 20:54:23,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 10497 transitions. [2022-09-20 20:54:23,682 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7434135977337111 [2022-09-20 20:54:23,682 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 10497 transitions. [2022-09-20 20:54:23,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 10497 transitions. [2022-09-20 20:54:23,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:54:23,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 10497 transitions. [2022-09-20 20:54:23,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 262.425) internal successors, (10497), 40 states have internal predecessors, (10497), 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) [2022-09-20 20:54:23,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 353.0) internal successors, (14473), 41 states have internal predecessors, (14473), 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) [2022-09-20 20:54:23,714 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 353.0) internal successors, (14473), 41 states have internal predecessors, (14473), 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) [2022-09-20 20:54:23,714 INFO L175 Difference]: Start difference. First operand has 569 places, 532 transitions, 3097 flow. Second operand 40 states and 10497 transitions. [2022-09-20 20:54:23,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 608 places, 960 transitions, 7792 flow [2022-09-20 20:54:27,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 960 transitions, 7281 flow, removed 205 selfloop flow, removed 4 redundant places. [2022-09-20 20:54:27,330 INFO L231 Difference]: Finished difference. Result has 632 places, 584 transitions, 3980 flow [2022-09-20 20:54:27,331 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=2777, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=3980, PETRI_PLACES=632, PETRI_TRANSITIONS=584} [2022-09-20 20:54:27,331 INFO L287 CegarLoopForPetriNet]: 314 programPoint places, 318 predicate places. [2022-09-20 20:54:27,331 INFO L495 AbstractCegarLoop]: Abstraction has has 632 places, 584 transitions, 3980 flow [2022-09-20 20:54:27,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 254.94117647058823) internal successors, (4334), 17 states have internal predecessors, (4334), 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) [2022-09-20 20:54:27,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:54:27,332 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:54:27,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-09-20 20:54:27,332 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:54:27,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:54:27,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1792984572, now seen corresponding path program 5 times [2022-09-20 20:54:27,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:54:27,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627977119] [2022-09-20 20:54:27,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:54:27,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:54:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:54:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 20:54:27,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:54:27,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627977119] [2022-09-20 20:54:27,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627977119] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:54:27,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:54:27,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-09-20 20:54:27,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342854109] [2022-09-20 20:54:27,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:54:27,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-09-20 20:54:27,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:54:27,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-09-20 20:54:27,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-09-20 20:54:27,535 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 353 [2022-09-20 20:54:27,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 632 places, 584 transitions, 3980 flow. Second operand has 17 states, 17 states have (on average 254.94117647058823) internal successors, (4334), 17 states have internal predecessors, (4334), 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) [2022-09-20 20:54:27,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:54:27,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 353 [2022-09-20 20:54:27,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand