/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 22:06:02,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 22:06:02,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 22:06:02,747 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 22:06:02,747 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 22:06:02,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 22:06:02,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 22:06:02,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 22:06:02,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 22:06:02,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 22:06:02,751 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 22:06:02,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 22:06:02,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 22:06:02,753 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 22:06:02,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 22:06:02,754 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 22:06:02,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 22:06:02,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 22:06:02,756 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 22:06:02,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 22:06:02,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 22:06:02,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 22:06:02,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 22:06:02,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 22:06:02,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-27 22:06:02,761 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-27 22:06:02,762 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-27 22:06:02,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-27 22:06:02,762 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-27 22:06:02,763 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-27 22:06:02,763 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 22:06:02,763 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 22:06:02,764 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 22:06:02,764 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 22:06:02,765 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 22:06:02,765 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 22:06:02,765 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 22:06:02,765 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 22:06:02,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 22:06:02,766 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 22:06:02,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 22:06:02,767 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 22:06:02,783 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 22:06:02,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 22:06:02,784 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 22:06:02,784 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 22:06:02,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 22:06:02,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 22:06:02,788 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 22:06:02,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 22:06:02,788 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 22:06:02,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 22:06:02,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 22:06:02,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 22:06:02,788 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 22:06:02,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 22:06:02,788 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 22:06:02,789 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 22:06:02,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 22:06:02,789 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 22:06:02,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 22:06:02,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 22:06:02,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 22:06:02,789 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 22:06:02,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 22:06:02,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 22:06:02,789 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 22:06:02,789 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 22:06:02,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 22:06:02,790 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 22:06:02,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 22:06:02,790 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 22:06:02,790 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 22:06:02,790 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 22:06:02,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 22:06:02,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 22:06:02,960 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 22:06:02,960 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 22:06:02,964 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 22:06:02,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c [2023-01-27 22:06:03,877 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 22:06:04,062 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 22:06:04,063 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c [2023-01-27 22:06:04,067 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0db193f47/25c4d75768634008b183ecfe63f8b566/FLAG5fd09074b [2023-01-27 22:06:04,076 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0db193f47/25c4d75768634008b183ecfe63f8b566 [2023-01-27 22:06:04,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 22:06:04,078 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 22:06:04,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 22:06:04,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 22:06:04,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 22:06:04,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 10:06:04" (1/1) ... [2023-01-27 22:06:04,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@309abb60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:06:04, skipping insertion in model container [2023-01-27 22:06:04,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 10:06:04" (1/1) ... [2023-01-27 22:06:04,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 22:06:04,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 22:06:04,223 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c[2553,2566] [2023-01-27 22:06:04,240 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 22:06:04,248 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 22:06:04,276 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c[2553,2566] [2023-01-27 22:06:04,278 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 22:06:04,294 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 22:06:04,294 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 22:06:04,298 INFO L208 MainTranslator]: Completed translation [2023-01-27 22:06:04,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:06:04 WrapperNode [2023-01-27 22:06:04,298 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 22:06:04,299 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 22:06:04,299 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 22:06:04,299 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 22:06:04,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:06:04" (1/1) ... [2023-01-27 22:06:04,316 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:06:04" (1/1) ... [2023-01-27 22:06:04,335 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 104 [2023-01-27 22:06:04,335 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 22:06:04,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 22:06:04,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 22:06:04,336 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 22:06:04,342 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:06:04" (1/1) ... [2023-01-27 22:06:04,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:06:04" (1/1) ... [2023-01-27 22:06:04,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:06:04" (1/1) ... [2023-01-27 22:06:04,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:06:04" (1/1) ... [2023-01-27 22:06:04,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:06:04" (1/1) ... [2023-01-27 22:06:04,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:06:04" (1/1) ... [2023-01-27 22:06:04,365 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:06:04" (1/1) ... [2023-01-27 22:06:04,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:06:04" (1/1) ... [2023-01-27 22:06:04,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 22:06:04,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 22:06:04,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 22:06:04,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 22:06:04,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:06:04" (1/1) ... [2023-01-27 22:06:04,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 22:06:04,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:06:04,394 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-27 22:06:04,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-27 22:06:04,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 22:06:04,423 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 22:06:04,423 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 22:06:04,424 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 22:06:04,424 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 22:06:04,424 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-27 22:06:04,424 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-27 22:06:04,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 22:06:04,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 22:06:04,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 22:06:04,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 22:06:04,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 22:06:04,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 22:06:04,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 22:06:04,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 22:06:04,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 22:06:04,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 22:06:04,426 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 22:06:04,532 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 22:06:04,533 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 22:06:04,756 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 22:06:04,819 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 22:06:04,819 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-01-27 22:06:04,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 10:06:04 BoogieIcfgContainer [2023-01-27 22:06:04,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 22:06:04,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 22:06:04,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 22:06:04,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 22:06:04,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 10:06:04" (1/3) ... [2023-01-27 22:06:04,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f814c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 10:06:04, skipping insertion in model container [2023-01-27 22:06:04,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:06:04" (2/3) ... [2023-01-27 22:06:04,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f814c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 10:06:04, skipping insertion in model container [2023-01-27 22:06:04,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 10:06:04" (3/3) ... [2023-01-27 22:06:04,830 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array.wvr.c [2023-01-27 22:06:04,841 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 22:06:04,841 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 22:06:04,841 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 22:06:04,890 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 22:06:04,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 144 transitions, 312 flow [2023-01-27 22:06:04,967 INFO L130 PetriNetUnfolder]: 12/141 cut-off events. [2023-01-27 22:06:04,967 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-27 22:06:04,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 141 events. 12/141 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 88 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-01-27 22:06:04,971 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 144 transitions, 312 flow [2023-01-27 22:06:04,975 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 131 transitions, 280 flow [2023-01-27 22:06:04,979 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 22:06:04,992 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 131 transitions, 280 flow [2023-01-27 22:06:04,997 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 131 transitions, 280 flow [2023-01-27 22:06:04,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 131 transitions, 280 flow [2023-01-27 22:06:05,023 INFO L130 PetriNetUnfolder]: 12/131 cut-off events. [2023-01-27 22:06:05,024 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-27 22:06:05,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 131 events. 12/131 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 89 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-01-27 22:06:05,025 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2023-01-27 22:06:08,733 INFO L134 LiptonReduction]: Checked pairs total: 1615 [2023-01-27 22:06:08,733 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-01-27 22:06:08,743 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 22:06:08,747 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;@72c9b1f1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 22:06:08,747 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 22:06:08,752 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2023-01-27 22:06:08,752 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-27 22:06:08,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:06:08,752 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] [2023-01-27 22:06:08,753 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:06:08,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:06:08,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1107178468, now seen corresponding path program 1 times [2023-01-27 22:06:08,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:06:08,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184508201] [2023-01-27 22:06:08,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:08,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:06:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:09,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:06:09,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184508201] [2023-01-27 22:06:09,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184508201] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 22:06:09,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 22:06:09,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 22:06:09,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996432956] [2023-01-27 22:06:09,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:06:09,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 22:06:09,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:06:09,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 22:06:09,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 22:06:09,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 273 [2023-01-27 22:06:09,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 5 states, 5 states have (on average 103.6) internal successors, (518), 5 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:09,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:06:09,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 273 [2023-01-27 22:06:09,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:06:09,478 INFO L130 PetriNetUnfolder]: 679/943 cut-off events. [2023-01-27 22:06:09,478 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2023-01-27 22:06:09,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1970 conditions, 943 events. 679/943 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3493 event pairs, 265 based on Foata normal form. 0/618 useless extension candidates. Maximal degree in co-relation 765. Up to 370 conditions per place. [2023-01-27 22:06:09,486 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 55 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2023-01-27 22:06:09,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 65 transitions, 304 flow [2023-01-27 22:06:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 22:06:09,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 22:06:09,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 765 transitions. [2023-01-27 22:06:09,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4003139717425432 [2023-01-27 22:06:09,502 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 765 transitions. [2023-01-27 22:06:09,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 765 transitions. [2023-01-27 22:06:09,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:06:09,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 765 transitions. [2023-01-27 22:06:09,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 109.28571428571429) internal successors, (765), 7 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:09,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:09,518 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:09,519 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 7 states and 765 transitions. [2023-01-27 22:06:09,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 65 transitions, 304 flow [2023-01-27 22:06:09,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 65 transitions, 272 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-27 22:06:09,525 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 97 flow [2023-01-27 22:06:09,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=97, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2023-01-27 22:06:09,530 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-01-27 22:06:09,530 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 97 flow [2023-01-27 22:06:09,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.6) internal successors, (518), 5 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:09,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:06:09,530 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] [2023-01-27 22:06:09,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 22:06:09,531 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:06:09,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:06:09,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1966737023, now seen corresponding path program 1 times [2023-01-27 22:06:09,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:06:09,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379505688] [2023-01-27 22:06:09,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:09,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:06:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:09,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:06:09,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379505688] [2023-01-27 22:06:09,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379505688] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 22:06:09,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 22:06:09,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 22:06:09,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138006569] [2023-01-27 22:06:09,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:06:09,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 22:06:09,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:06:09,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 22:06:09,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 22:06:09,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 273 [2023-01-27 22:06:09,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:09,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:06:09,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 273 [2023-01-27 22:06:09,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:06:09,791 INFO L130 PetriNetUnfolder]: 342/475 cut-off events. [2023-01-27 22:06:09,791 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2023-01-27 22:06:09,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153 conditions, 475 events. 342/475 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1468 event pairs, 133 based on Foata normal form. 0/312 useless extension candidates. Maximal degree in co-relation 1137. Up to 371 conditions per place. [2023-01-27 22:06:09,793 INFO L137 encePairwiseOnDemand]: 269/273 looper letters, 30 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-01-27 22:06:09,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 168 flow [2023-01-27 22:06:09,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 22:06:09,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 22:06:09,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 433 transitions. [2023-01-27 22:06:09,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3965201465201465 [2023-01-27 22:06:09,795 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 433 transitions. [2023-01-27 22:06:09,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 433 transitions. [2023-01-27 22:06:09,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:06:09,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 433 transitions. [2023-01-27 22:06:09,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.25) internal successors, (433), 4 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:09,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:09,798 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:09,798 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 97 flow. Second operand 4 states and 433 transitions. [2023-01-27 22:06:09,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 168 flow [2023-01-27 22:06:09,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 157 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-27 22:06:09,800 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 77 flow [2023-01-27 22:06:09,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=77, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-01-27 22:06:09,801 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-01-27 22:06:09,802 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 77 flow [2023-01-27 22:06:09,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:09,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:06:09,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:06:09,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 22:06:09,802 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:06:09,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:06:09,804 INFO L85 PathProgramCache]: Analyzing trace with hash -805618038, now seen corresponding path program 1 times [2023-01-27 22:06:09,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:06:09,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668396208] [2023-01-27 22:06:09,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:09,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:06:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:09,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:06:09,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668396208] [2023-01-27 22:06:09,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668396208] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:06:09,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53084401] [2023-01-27 22:06:09,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:09,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:09,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:06:09,887 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:06:09,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 22:06:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:09,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 22:06:09,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:06:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:10,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:06:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:10,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53084401] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 22:06:10,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 22:06:10,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-01-27 22:06:10,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593815615] [2023-01-27 22:06:10,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:06:10,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 22:06:10,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:06:10,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 22:06:10,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-01-27 22:06:10,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 273 [2023-01-27 22:06:10,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 77 flow. Second operand has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:10,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:06:10,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 273 [2023-01-27 22:06:10,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:06:10,130 INFO L130 PetriNetUnfolder]: 311/453 cut-off events. [2023-01-27 22:06:10,130 INFO L131 PetriNetUnfolder]: For 117/143 co-relation queries the response was YES. [2023-01-27 22:06:10,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1028 conditions, 453 events. 311/453 cut-off events. For 117/143 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1443 event pairs, 73 based on Foata normal form. 26/371 useless extension candidates. Maximal degree in co-relation 1011. Up to 349 conditions per place. [2023-01-27 22:06:10,132 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 31 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2023-01-27 22:06:10,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 177 flow [2023-01-27 22:06:10,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 22:06:10,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 22:06:10,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 554 transitions. [2023-01-27 22:06:10,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40586080586080586 [2023-01-27 22:06:10,134 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 554 transitions. [2023-01-27 22:06:10,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 554 transitions. [2023-01-27 22:06:10,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:06:10,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 554 transitions. [2023-01-27 22:06:10,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:10,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:10,137 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:10,137 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 77 flow. Second operand 5 states and 554 transitions. [2023-01-27 22:06:10,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 37 transitions, 177 flow [2023-01-27 22:06:10,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 37 transitions, 171 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 22:06:10,139 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 88 flow [2023-01-27 22:06:10,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2023-01-27 22:06:10,139 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-01-27 22:06:10,139 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 88 flow [2023-01-27 22:06:10,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:10,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:06:10,140 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] [2023-01-27 22:06:10,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 22:06:10,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:10,345 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:06:10,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:06:10,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1619003621, now seen corresponding path program 1 times [2023-01-27 22:06:10,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:06:10,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364371899] [2023-01-27 22:06:10,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:10,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:06:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:10,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:10,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:06:10,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364371899] [2023-01-27 22:06:10,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364371899] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:06:10,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549552788] [2023-01-27 22:06:10,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:10,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:10,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:06:10,921 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:06:10,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 22:06:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:10,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-27 22:06:10,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:06:11,319 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-01-27 22:06:11,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 59 [2023-01-27 22:06:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:11,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:06:11,545 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:06:11,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 45 [2023-01-27 22:06:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:11,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549552788] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:06:11,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:06:11,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2023-01-27 22:06:11,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122073545] [2023-01-27 22:06:11,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:06:11,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 22:06:11,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:06:11,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 22:06:11,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-01-27 22:06:11,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 273 [2023-01-27 22:06:11,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 88 flow. Second operand has 23 states, 23 states have (on average 84.6086956521739) internal successors, (1946), 23 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:11,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:06:11,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 273 [2023-01-27 22:06:11,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:06:12,415 INFO L130 PetriNetUnfolder]: 679/981 cut-off events. [2023-01-27 22:06:12,415 INFO L131 PetriNetUnfolder]: For 321/321 co-relation queries the response was YES. [2023-01-27 22:06:12,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2546 conditions, 981 events. 679/981 cut-off events. For 321/321 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3670 event pairs, 84 based on Foata normal form. 2/715 useless extension candidates. Maximal degree in co-relation 2286. Up to 677 conditions per place. [2023-01-27 22:06:12,420 INFO L137 encePairwiseOnDemand]: 263/273 looper letters, 73 selfloop transitions, 35 changer transitions 4/113 dead transitions. [2023-01-27 22:06:12,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 113 transitions, 564 flow [2023-01-27 22:06:12,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 22:06:12,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 22:06:12,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1175 transitions. [2023-01-27 22:06:12,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3310791772330234 [2023-01-27 22:06:12,423 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1175 transitions. [2023-01-27 22:06:12,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1175 transitions. [2023-01-27 22:06:12,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:06:12,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1175 transitions. [2023-01-27 22:06:12,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 90.38461538461539) internal successors, (1175), 13 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:12,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:12,429 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:12,429 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 88 flow. Second operand 13 states and 1175 transitions. [2023-01-27 22:06:12,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 113 transitions, 564 flow [2023-01-27 22:06:12,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 113 transitions, 536 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-01-27 22:06:12,433 INFO L231 Difference]: Finished difference. Result has 51 places, 60 transitions, 304 flow [2023-01-27 22:06:12,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=304, PETRI_PLACES=51, PETRI_TRANSITIONS=60} [2023-01-27 22:06:12,434 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 21 predicate places. [2023-01-27 22:06:12,435 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 60 transitions, 304 flow [2023-01-27 22:06:12,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 84.6086956521739) internal successors, (1946), 23 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:12,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:06:12,435 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] [2023-01-27 22:06:12,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-27 22:06:12,642 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,SelfDestructingSolverStorable3 [2023-01-27 22:06:12,643 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:06:12,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:06:12,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1587343155, now seen corresponding path program 2 times [2023-01-27 22:06:12,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:06:12,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076019423] [2023-01-27 22:06:12,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:12,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:06:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:13,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:13,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:06:13,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076019423] [2023-01-27 22:06:13,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076019423] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:06:13,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297168394] [2023-01-27 22:06:13,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:06:13,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:13,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:06:13,145 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:06:13,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 22:06:13,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:06:13,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:06:13,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-27 22:06:13,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:06:13,435 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 22:06:13,437 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:06:13,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 37 [2023-01-27 22:06:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:13,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:06:13,553 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:06:13,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 45 [2023-01-27 22:06:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:13,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297168394] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:06:13,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:06:13,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 23 [2023-01-27 22:06:13,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709826417] [2023-01-27 22:06:13,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:06:13,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 22:06:13,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:06:13,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 22:06:13,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2023-01-27 22:06:13,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 273 [2023-01-27 22:06:13,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 60 transitions, 304 flow. Second operand has 25 states, 25 states have (on average 81.52) internal successors, (2038), 25 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:13,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:06:13,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 273 [2023-01-27 22:06:13,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:06:14,440 INFO L130 PetriNetUnfolder]: 1001/1468 cut-off events. [2023-01-27 22:06:14,440 INFO L131 PetriNetUnfolder]: For 1349/1349 co-relation queries the response was YES. [2023-01-27 22:06:14,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4806 conditions, 1468 events. 1001/1468 cut-off events. For 1349/1349 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5408 event pairs, 136 based on Foata normal form. 2/1464 useless extension candidates. Maximal degree in co-relation 4542. Up to 1033 conditions per place. [2023-01-27 22:06:14,448 INFO L137 encePairwiseOnDemand]: 261/273 looper letters, 105 selfloop transitions, 54 changer transitions 7/166 dead transitions. [2023-01-27 22:06:14,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 166 transitions, 1007 flow [2023-01-27 22:06:14,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 22:06:14,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 22:06:14,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1561 transitions. [2023-01-27 22:06:14,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3176638176638177 [2023-01-27 22:06:14,451 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1561 transitions. [2023-01-27 22:06:14,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1561 transitions. [2023-01-27 22:06:14,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:06:14,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1561 transitions. [2023-01-27 22:06:14,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 86.72222222222223) internal successors, (1561), 18 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:14,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 273.0) internal successors, (5187), 19 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:14,459 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 273.0) internal successors, (5187), 19 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:14,459 INFO L175 Difference]: Start difference. First operand has 51 places, 60 transitions, 304 flow. Second operand 18 states and 1561 transitions. [2023-01-27 22:06:14,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 166 transitions, 1007 flow [2023-01-27 22:06:14,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 166 transitions, 993 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-27 22:06:14,465 INFO L231 Difference]: Finished difference. Result has 74 places, 97 transitions, 664 flow [2023-01-27 22:06:14,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=664, PETRI_PLACES=74, PETRI_TRANSITIONS=97} [2023-01-27 22:06:14,466 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2023-01-27 22:06:14,466 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 97 transitions, 664 flow [2023-01-27 22:06:14,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 81.52) internal successors, (2038), 25 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:14,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:06:14,467 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] [2023-01-27 22:06:14,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 22:06:14,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:14,674 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:06:14,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:06:14,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1702762413, now seen corresponding path program 3 times [2023-01-27 22:06:14,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:06:14,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286077768] [2023-01-27 22:06:14,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:14,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:06:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:15,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:15,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:06:15,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286077768] [2023-01-27 22:06:15,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286077768] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:06:15,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248832905] [2023-01-27 22:06:15,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:06:15,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:15,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:06:15,262 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:06:15,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 22:06:15,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 22:06:15,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:06:15,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 30 conjunts are in the unsatisfiable core [2023-01-27 22:06:15,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:06:15,598 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 22:06:15,600 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:06:15,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 37 [2023-01-27 22:06:15,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:15,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:06:15,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:06:15,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 45 [2023-01-27 22:06:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:15,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248832905] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:06:15,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:06:15,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 24 [2023-01-27 22:06:15,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946404399] [2023-01-27 22:06:15,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:06:15,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 22:06:15,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:06:15,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 22:06:15,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2023-01-27 22:06:15,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 273 [2023-01-27 22:06:15,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 97 transitions, 664 flow. Second operand has 26 states, 26 states have (on average 71.42307692307692) internal successors, (1857), 26 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:15,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:06:15,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 273 [2023-01-27 22:06:15,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:06:16,947 INFO L130 PetriNetUnfolder]: 1399/2097 cut-off events. [2023-01-27 22:06:16,947 INFO L131 PetriNetUnfolder]: For 3789/3789 co-relation queries the response was YES. [2023-01-27 22:06:16,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8288 conditions, 2097 events. 1399/2097 cut-off events. For 3789/3789 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8873 event pairs, 132 based on Foata normal form. 3/2100 useless extension candidates. Maximal degree in co-relation 8253. Up to 1224 conditions per place. [2023-01-27 22:06:16,959 INFO L137 encePairwiseOnDemand]: 259/273 looper letters, 161 selfloop transitions, 107 changer transitions 5/273 dead transitions. [2023-01-27 22:06:16,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 273 transitions, 2012 flow [2023-01-27 22:06:16,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 22:06:16,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 22:06:16,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1718 transitions. [2023-01-27 22:06:16,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.286047286047286 [2023-01-27 22:06:16,963 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1718 transitions. [2023-01-27 22:06:16,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1718 transitions. [2023-01-27 22:06:16,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:06:16,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1718 transitions. [2023-01-27 22:06:16,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 78.0909090909091) internal successors, (1718), 22 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:16,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 273.0) internal successors, (6279), 23 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:16,972 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 273.0) internal successors, (6279), 23 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:16,972 INFO L175 Difference]: Start difference. First operand has 74 places, 97 transitions, 664 flow. Second operand 22 states and 1718 transitions. [2023-01-27 22:06:16,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 273 transitions, 2012 flow [2023-01-27 22:06:16,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 273 transitions, 1953 flow, removed 25 selfloop flow, removed 3 redundant places. [2023-01-27 22:06:16,985 INFO L231 Difference]: Finished difference. Result has 104 places, 159 transitions, 1411 flow [2023-01-27 22:06:16,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1411, PETRI_PLACES=104, PETRI_TRANSITIONS=159} [2023-01-27 22:06:16,985 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 74 predicate places. [2023-01-27 22:06:16,985 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 159 transitions, 1411 flow [2023-01-27 22:06:16,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 71.42307692307692) internal successors, (1857), 26 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:16,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:06:16,986 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] [2023-01-27 22:06:16,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-01-27 22:06:17,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:17,191 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:06:17,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:06:17,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1571153735, now seen corresponding path program 4 times [2023-01-27 22:06:17,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:06:17,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927149555] [2023-01-27 22:06:17,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:17,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:06:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:17,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:17,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:06:17,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927149555] [2023-01-27 22:06:17,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927149555] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:06:17,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245633416] [2023-01-27 22:06:17,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:06:17,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:17,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:06:17,670 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:06:17,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 22:06:17,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:06:17,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:06:17,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-27 22:06:17,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:06:17,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:06:17,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-01-27 22:06:18,084 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 22:06:18,086 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:06:18,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 37 [2023-01-27 22:06:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:18,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:06:18,241 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (or (= c_~max1~0 c_~max2~0) (forall ((v_ArrVal_261 (Array Int Int))) (< c_~max2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_261) c_~A~0.base) .cse0)))) (forall ((v_ArrVal_261 (Array Int Int))) (let ((.cse1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_261) c_~A~0.base) .cse0))) (or (= c_~max1~0 .cse1) (<= .cse1 c_~max2~0)))))) is different from false [2023-01-27 22:06:18,267 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:06:18,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 99 [2023-01-27 22:06:18,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2023-01-27 22:06:18,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2023-01-27 22:06:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-01-27 22:06:18,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245633416] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:06:18,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:06:18,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-01-27 22:06:18,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186409240] [2023-01-27 22:06:18,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:06:18,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-27 22:06:18,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:06:18,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-27 22:06:18,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=592, Unknown=1, NotChecked=50, Total=756 [2023-01-27 22:06:18,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 273 [2023-01-27 22:06:18,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 159 transitions, 1411 flow. Second operand has 28 states, 28 states have (on average 77.25) internal successors, (2163), 28 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:18,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:06:18,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 273 [2023-01-27 22:06:18,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:06:19,597 INFO L130 PetriNetUnfolder]: 1794/2701 cut-off events. [2023-01-27 22:06:19,597 INFO L131 PetriNetUnfolder]: For 9600/9600 co-relation queries the response was YES. [2023-01-27 22:06:19,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13200 conditions, 2701 events. 1794/2701 cut-off events. For 9600/9600 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12296 event pairs, 168 based on Foata normal form. 1/2702 useless extension candidates. Maximal degree in co-relation 13154. Up to 1507 conditions per place. [2023-01-27 22:06:19,613 INFO L137 encePairwiseOnDemand]: 259/273 looper letters, 175 selfloop transitions, 150 changer transitions 4/329 dead transitions. [2023-01-27 22:06:19,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 329 transitions, 3191 flow [2023-01-27 22:06:19,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-27 22:06:19,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-27 22:06:19,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1763 transitions. [2023-01-27 22:06:19,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3075178789464504 [2023-01-27 22:06:19,617 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1763 transitions. [2023-01-27 22:06:19,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1763 transitions. [2023-01-27 22:06:19,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:06:19,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1763 transitions. [2023-01-27 22:06:19,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 83.95238095238095) internal successors, (1763), 21 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:19,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 273.0) internal successors, (6006), 22 states have internal predecessors, (6006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:19,625 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 273.0) internal successors, (6006), 22 states have internal predecessors, (6006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:19,625 INFO L175 Difference]: Start difference. First operand has 104 places, 159 transitions, 1411 flow. Second operand 21 states and 1763 transitions. [2023-01-27 22:06:19,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 329 transitions, 3191 flow [2023-01-27 22:06:19,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 329 transitions, 3065 flow, removed 55 selfloop flow, removed 4 redundant places. [2023-01-27 22:06:19,651 INFO L231 Difference]: Finished difference. Result has 127 places, 222 transitions, 2379 flow [2023-01-27 22:06:19,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2379, PETRI_PLACES=127, PETRI_TRANSITIONS=222} [2023-01-27 22:06:19,652 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2023-01-27 22:06:19,652 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 222 transitions, 2379 flow [2023-01-27 22:06:19,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 77.25) internal successors, (2163), 28 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:19,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:06:19,653 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] [2023-01-27 22:06:19,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-27 22:06:19,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:19,860 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:06:19,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:06:19,861 INFO L85 PathProgramCache]: Analyzing trace with hash 353698307, now seen corresponding path program 5 times [2023-01-27 22:06:19,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:06:19,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907579162] [2023-01-27 22:06:19,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:19,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:06:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:20,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:20,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:06:20,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907579162] [2023-01-27 22:06:20,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907579162] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:06:20,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004967139] [2023-01-27 22:06:20,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:06:20,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:20,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:06:20,241 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:06:20,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 22:06:20,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 22:06:20,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:06:20,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 22:06:20,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:06:20,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:06:20,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 71 [2023-01-27 22:06:20,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:20,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:06:20,962 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 22:06:20,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 41 [2023-01-27 22:06:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:21,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004967139] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:06:21,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:06:21,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 20 [2023-01-27 22:06:21,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258714023] [2023-01-27 22:06:21,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:06:21,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 22:06:21,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:06:21,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 22:06:21,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2023-01-27 22:06:21,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 273 [2023-01-27 22:06:21,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 222 transitions, 2379 flow. Second operand has 22 states, 22 states have (on average 84.68181818181819) internal successors, (1863), 22 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:21,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:06:21,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 273 [2023-01-27 22:06:21,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:06:22,796 INFO L130 PetriNetUnfolder]: 2493/3915 cut-off events. [2023-01-27 22:06:22,797 INFO L131 PetriNetUnfolder]: For 20392/20444 co-relation queries the response was YES. [2023-01-27 22:06:22,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20768 conditions, 3915 events. 2493/3915 cut-off events. For 20392/20444 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 21794 event pairs, 185 based on Foata normal form. 38/3940 useless extension candidates. Maximal degree in co-relation 20714. Up to 2338 conditions per place. [2023-01-27 22:06:22,835 INFO L137 encePairwiseOnDemand]: 259/273 looper letters, 217 selfloop transitions, 197 changer transitions 9/429 dead transitions. [2023-01-27 22:06:22,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 429 transitions, 4902 flow [2023-01-27 22:06:22,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-27 22:06:22,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-27 22:06:22,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2148 transitions. [2023-01-27 22:06:22,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32783882783882784 [2023-01-27 22:06:22,843 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2148 transitions. [2023-01-27 22:06:22,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2148 transitions. [2023-01-27 22:06:22,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:06:22,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2148 transitions. [2023-01-27 22:06:22,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 89.5) internal successors, (2148), 24 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:22,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 273.0) internal successors, (6825), 25 states have internal predecessors, (6825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:22,854 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 273.0) internal successors, (6825), 25 states have internal predecessors, (6825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:22,854 INFO L175 Difference]: Start difference. First operand has 127 places, 222 transitions, 2379 flow. Second operand 24 states and 2148 transitions. [2023-01-27 22:06:22,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 429 transitions, 4902 flow [2023-01-27 22:06:22,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 429 transitions, 4594 flow, removed 142 selfloop flow, removed 5 redundant places. [2023-01-27 22:06:22,906 INFO L231 Difference]: Finished difference. Result has 154 places, 337 transitions, 3925 flow [2023-01-27 22:06:22,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2222, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3925, PETRI_PLACES=154, PETRI_TRANSITIONS=337} [2023-01-27 22:06:22,908 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 124 predicate places. [2023-01-27 22:06:22,909 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 337 transitions, 3925 flow [2023-01-27 22:06:22,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 84.68181818181819) internal successors, (1863), 22 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:22,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:06:22,909 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] [2023-01-27 22:06:22,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-27 22:06:23,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:23,115 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:06:23,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:06:23,115 INFO L85 PathProgramCache]: Analyzing trace with hash -536441915, now seen corresponding path program 6 times [2023-01-27 22:06:23,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:06:23,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475596500] [2023-01-27 22:06:23,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:23,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:06:23,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:23,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:06:23,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475596500] [2023-01-27 22:06:23,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475596500] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:06:23,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940570732] [2023-01-27 22:06:23,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:06:23,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:23,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:06:23,449 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:06:23,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 22:06:23,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 22:06:23,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:06:23,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 30 conjunts are in the unsatisfiable core [2023-01-27 22:06:23,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:06:23,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 30 [2023-01-27 22:06:23,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:23,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:06:23,839 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:06:23,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 45 [2023-01-27 22:06:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:23,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940570732] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:06:23,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:06:23,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-01-27 22:06:23,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306290474] [2023-01-27 22:06:23,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:06:23,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 22:06:23,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:06:23,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 22:06:23,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-01-27 22:06:23,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 273 [2023-01-27 22:06:23,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 337 transitions, 3925 flow. Second operand has 22 states, 22 states have (on average 81.77272727272727) internal successors, (1799), 22 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:23,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:06:23,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 273 [2023-01-27 22:06:23,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:06:24,935 INFO L130 PetriNetUnfolder]: 2826/4401 cut-off events. [2023-01-27 22:06:24,935 INFO L131 PetriNetUnfolder]: For 29259/29259 co-relation queries the response was YES. [2023-01-27 22:06:24,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25243 conditions, 4401 events. 2826/4401 cut-off events. For 29259/29259 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23294 event pairs, 721 based on Foata normal form. 2/4403 useless extension candidates. Maximal degree in co-relation 25180. Up to 3860 conditions per place. [2023-01-27 22:06:24,967 INFO L137 encePairwiseOnDemand]: 261/273 looper letters, 278 selfloop transitions, 135 changer transitions 2/415 dead transitions. [2023-01-27 22:06:24,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 415 transitions, 5444 flow [2023-01-27 22:06:24,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 22:06:24,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 22:06:24,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1544 transitions. [2023-01-27 22:06:24,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3142043142043142 [2023-01-27 22:06:24,970 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1544 transitions. [2023-01-27 22:06:24,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1544 transitions. [2023-01-27 22:06:24,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:06:24,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1544 transitions. [2023-01-27 22:06:24,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 85.77777777777777) internal successors, (1544), 18 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:24,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 273.0) internal successors, (5187), 19 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:24,976 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 273.0) internal successors, (5187), 19 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:24,976 INFO L175 Difference]: Start difference. First operand has 154 places, 337 transitions, 3925 flow. Second operand 18 states and 1544 transitions. [2023-01-27 22:06:24,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 415 transitions, 5444 flow [2023-01-27 22:06:25,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 415 transitions, 4874 flow, removed 222 selfloop flow, removed 7 redundant places. [2023-01-27 22:06:25,054 INFO L231 Difference]: Finished difference. Result has 168 places, 363 transitions, 4059 flow [2023-01-27 22:06:25,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3482, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4059, PETRI_PLACES=168, PETRI_TRANSITIONS=363} [2023-01-27 22:06:25,055 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 138 predicate places. [2023-01-27 22:06:25,055 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 363 transitions, 4059 flow [2023-01-27 22:06:25,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 81.77272727272727) internal successors, (1799), 22 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:25,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:06:25,056 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] [2023-01-27 22:06:25,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-27 22:06:25,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:25,263 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:06:25,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:06:25,263 INFO L85 PathProgramCache]: Analyzing trace with hash 820266829, now seen corresponding path program 7 times [2023-01-27 22:06:25,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:06:25,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533477316] [2023-01-27 22:06:25,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:25,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:06:25,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:25,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:06:25,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533477316] [2023-01-27 22:06:25,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533477316] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:06:25,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289852010] [2023-01-27 22:06:25,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 22:06:25,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:25,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:06:25,834 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:06:25,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-27 22:06:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:25,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-27 22:06:25,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:06:26,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 30 [2023-01-27 22:06:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:26,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:06:26,254 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:06:26,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 45 [2023-01-27 22:06:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:26,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289852010] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:06:26,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:06:26,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 22 [2023-01-27 22:06:26,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832883049] [2023-01-27 22:06:26,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:06:26,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 22:06:26,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:06:26,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 22:06:26,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-01-27 22:06:26,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 273 [2023-01-27 22:06:26,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 363 transitions, 4059 flow. Second operand has 24 states, 24 states have (on average 74.45833333333333) internal successors, (1787), 24 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:26,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:06:26,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 273 [2023-01-27 22:06:26,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:06:27,336 INFO L130 PetriNetUnfolder]: 2667/4232 cut-off events. [2023-01-27 22:06:27,336 INFO L131 PetriNetUnfolder]: For 22344/22381 co-relation queries the response was YES. [2023-01-27 22:06:27,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22983 conditions, 4232 events. 2667/4232 cut-off events. For 22344/22381 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23723 event pairs, 570 based on Foata normal form. 24/4240 useless extension candidates. Maximal degree in co-relation 22917. Up to 3867 conditions per place. [2023-01-27 22:06:27,366 INFO L137 encePairwiseOnDemand]: 263/273 looper letters, 289 selfloop transitions, 110 changer transitions 1/410 dead transitions. [2023-01-27 22:06:27,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 410 transitions, 5166 flow [2023-01-27 22:06:27,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 22:06:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 22:06:27,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 875 transitions. [2023-01-27 22:06:27,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2913752913752914 [2023-01-27 22:06:27,367 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 875 transitions. [2023-01-27 22:06:27,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 875 transitions. [2023-01-27 22:06:27,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:06:27,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 875 transitions. [2023-01-27 22:06:27,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 79.54545454545455) internal successors, (875), 11 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:27,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 273.0) internal successors, (3276), 12 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:27,371 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 273.0) internal successors, (3276), 12 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:27,371 INFO L175 Difference]: Start difference. First operand has 168 places, 363 transitions, 4059 flow. Second operand 11 states and 875 transitions. [2023-01-27 22:06:27,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 410 transitions, 5166 flow [2023-01-27 22:06:27,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 410 transitions, 5000 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-01-27 22:06:27,423 INFO L231 Difference]: Finished difference. Result has 173 places, 375 transitions, 4307 flow [2023-01-27 22:06:27,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3899, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4307, PETRI_PLACES=173, PETRI_TRANSITIONS=375} [2023-01-27 22:06:27,424 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 143 predicate places. [2023-01-27 22:06:27,424 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 375 transitions, 4307 flow [2023-01-27 22:06:27,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 74.45833333333333) internal successors, (1787), 24 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:27,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:06:27,424 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] [2023-01-27 22:06:27,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-27 22:06:27,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-01-27 22:06:27,629 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:06:27,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:06:27,630 INFO L85 PathProgramCache]: Analyzing trace with hash 663032483, now seen corresponding path program 8 times [2023-01-27 22:06:27,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:06:27,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84649692] [2023-01-27 22:06:27,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:27,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:06:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:28,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:06:28,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84649692] [2023-01-27 22:06:28,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84649692] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:06:28,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212236317] [2023-01-27 22:06:28,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:06:28,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:28,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:06:28,087 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:06:28,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-27 22:06:28,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:06:28,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:06:28,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-27 22:06:28,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:06:28,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:06:28,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-01-27 22:06:28,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:06:28,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-01-27 22:06:28,539 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 22:06:28,541 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:06:28,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 37 [2023-01-27 22:06:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:28,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:06:28,736 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_438 (Array Int Int)) (v_ArrVal_439 (Array Int Int))) (let ((.cse0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_438) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_439) c_~A~0.base) .cse1))) (or (= c_~max1~0 .cse0) (<= .cse0 c_~max2~0)))) (or (= c_~max1~0 c_~max2~0) (forall ((v_ArrVal_438 (Array Int Int)) (v_ArrVal_439 (Array Int Int))) (< c_~max2~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_438) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_439) c_~A~0.base) .cse1)))))) is different from false [2023-01-27 22:06:28,753 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:06:28,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 409 treesize of output 353 [2023-01-27 22:06:28,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 171 [2023-01-27 22:06:28,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 165 [2023-01-27 22:06:28,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 153 [2023-01-27 22:06:28,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 129 [2023-01-27 22:06:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:29,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212236317] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:06:29,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:06:29,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-01-27 22:06:29,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786924162] [2023-01-27 22:06:29,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:06:29,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-27 22:06:29,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:06:29,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-27 22:06:29,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=592, Unknown=8, NotChecked=50, Total=756 [2023-01-27 22:06:29,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 273 [2023-01-27 22:06:29,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 375 transitions, 4307 flow. Second operand has 28 states, 28 states have (on average 77.14285714285714) internal successors, (2160), 28 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:29,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:06:29,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 273 [2023-01-27 22:06:29,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:06:34,488 INFO L130 PetriNetUnfolder]: 2910/4621 cut-off events. [2023-01-27 22:06:34,488 INFO L131 PetriNetUnfolder]: For 26057/26173 co-relation queries the response was YES. [2023-01-27 22:06:34,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25525 conditions, 4621 events. 2910/4621 cut-off events. For 26057/26173 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 26544 event pairs, 407 based on Foata normal form. 42/4649 useless extension candidates. Maximal degree in co-relation 25456. Up to 3074 conditions per place. [2023-01-27 22:06:34,566 INFO L137 encePairwiseOnDemand]: 262/273 looper letters, 248 selfloop transitions, 201 changer transitions 4/463 dead transitions. [2023-01-27 22:06:34,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 463 transitions, 5800 flow [2023-01-27 22:06:34,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 22:06:34,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 22:06:34,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1102 transitions. [2023-01-27 22:06:34,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31051000281769514 [2023-01-27 22:06:34,568 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1102 transitions. [2023-01-27 22:06:34,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1102 transitions. [2023-01-27 22:06:34,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:06:34,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1102 transitions. [2023-01-27 22:06:34,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 84.76923076923077) internal successors, (1102), 13 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:34,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:34,573 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:34,573 INFO L175 Difference]: Start difference. First operand has 173 places, 375 transitions, 4307 flow. Second operand 13 states and 1102 transitions. [2023-01-27 22:06:34,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 463 transitions, 5800 flow [2023-01-27 22:06:34,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 463 transitions, 5649 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-01-27 22:06:34,641 INFO L231 Difference]: Finished difference. Result has 183 places, 398 transitions, 5003 flow [2023-01-27 22:06:34,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=4156, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5003, PETRI_PLACES=183, PETRI_TRANSITIONS=398} [2023-01-27 22:06:34,642 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 153 predicate places. [2023-01-27 22:06:34,642 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 398 transitions, 5003 flow [2023-01-27 22:06:34,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 77.14285714285714) internal successors, (2160), 28 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:34,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:06:34,642 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:06:34,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-01-27 22:06:34,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:34,847 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:06:34,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:06:34,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1650774356, now seen corresponding path program 9 times [2023-01-27 22:06:34,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:06:34,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172834958] [2023-01-27 22:06:34,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:34,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:06:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:34,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:06:34,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172834958] [2023-01-27 22:06:34,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172834958] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:06:34,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498441149] [2023-01-27 22:06:34,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:06:34,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:34,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:06:34,916 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:06:34,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-27 22:06:34,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 22:06:34,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:06:35,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 22:06:35,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:06:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:35,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:06:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:35,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498441149] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:06:35,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:06:35,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-27 22:06:35,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967679518] [2023-01-27 22:06:35,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:06:35,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 22:06:35,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:06:35,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 22:06:35,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-01-27 22:06:35,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 273 [2023-01-27 22:06:35,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 398 transitions, 5003 flow. Second operand has 14 states, 14 states have (on average 106.35714285714286) internal successors, (1489), 14 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:35,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:06:35,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 273 [2023-01-27 22:06:35,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:06:35,859 INFO L130 PetriNetUnfolder]: 2867/4707 cut-off events. [2023-01-27 22:06:35,868 INFO L131 PetriNetUnfolder]: For 39136/39461 co-relation queries the response was YES. [2023-01-27 22:06:35,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27443 conditions, 4707 events. 2867/4707 cut-off events. For 39136/39461 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 28953 event pairs, 726 based on Foata normal form. 420/5018 useless extension candidates. Maximal degree in co-relation 27370. Up to 2543 conditions per place. [2023-01-27 22:06:35,905 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 355 selfloop transitions, 39 changer transitions 1/427 dead transitions. [2023-01-27 22:06:35,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 427 transitions, 5969 flow [2023-01-27 22:06:35,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 22:06:35,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 22:06:35,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 904 transitions. [2023-01-27 22:06:35,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4139194139194139 [2023-01-27 22:06:35,907 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 904 transitions. [2023-01-27 22:06:35,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 904 transitions. [2023-01-27 22:06:35,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:06:35,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 904 transitions. [2023-01-27 22:06:35,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.0) internal successors, (904), 8 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:35,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 273.0) internal successors, (2457), 9 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:35,912 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 273.0) internal successors, (2457), 9 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:35,912 INFO L175 Difference]: Start difference. First operand has 183 places, 398 transitions, 5003 flow. Second operand 8 states and 904 transitions. [2023-01-27 22:06:35,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 427 transitions, 5969 flow [2023-01-27 22:06:35,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 427 transitions, 5756 flow, removed 37 selfloop flow, removed 8 redundant places. [2023-01-27 22:06:35,991 INFO L231 Difference]: Finished difference. Result has 186 places, 366 transitions, 4532 flow [2023-01-27 22:06:35,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=4349, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4532, PETRI_PLACES=186, PETRI_TRANSITIONS=366} [2023-01-27 22:06:35,992 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 156 predicate places. [2023-01-27 22:06:35,992 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 366 transitions, 4532 flow [2023-01-27 22:06:35,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 106.35714285714286) internal successors, (1489), 14 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:35,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:06:35,993 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] [2023-01-27 22:06:36,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-27 22:06:36,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-01-27 22:06:36,198 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:06:36,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:06:36,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1159546519, now seen corresponding path program 1 times [2023-01-27 22:06:36,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:06:36,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650818282] [2023-01-27 22:06:36,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:36,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:06:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:36,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:36,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:06:36,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650818282] [2023-01-27 22:06:36,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650818282] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:06:36,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320228674] [2023-01-27 22:06:36,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:36,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:36,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:06:36,279 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:06:36,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-27 22:06:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:36,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 22:06:36,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:06:36,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:36,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:06:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:36,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320228674] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:06:36,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:06:36,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-27 22:06:36,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434643617] [2023-01-27 22:06:36,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:06:36,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 22:06:36,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:06:36,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 22:06:36,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-01-27 22:06:36,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 273 [2023-01-27 22:06:36,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 366 transitions, 4532 flow. Second operand has 16 states, 16 states have (on average 99.3125) internal successors, (1589), 16 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:36,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:06:36,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 273 [2023-01-27 22:06:36,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:06:37,273 INFO L130 PetriNetUnfolder]: 2773/4666 cut-off events. [2023-01-27 22:06:37,273 INFO L131 PetriNetUnfolder]: For 38674/38698 co-relation queries the response was YES. [2023-01-27 22:06:37,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26816 conditions, 4666 events. 2773/4666 cut-off events. For 38674/38698 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 28678 event pairs, 315 based on Foata normal form. 339/4994 useless extension candidates. Maximal degree in co-relation 26739. Up to 2009 conditions per place. [2023-01-27 22:06:37,302 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 391 selfloop transitions, 44 changer transitions 20/470 dead transitions. [2023-01-27 22:06:37,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 470 transitions, 6221 flow [2023-01-27 22:06:37,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 22:06:37,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 22:06:37,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1163 transitions. [2023-01-27 22:06:37,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38727938727938727 [2023-01-27 22:06:37,303 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1163 transitions. [2023-01-27 22:06:37,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1163 transitions. [2023-01-27 22:06:37,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:06:37,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1163 transitions. [2023-01-27 22:06:37,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 105.72727272727273) internal successors, (1163), 11 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:37,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 273.0) internal successors, (3276), 12 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:37,307 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 273.0) internal successors, (3276), 12 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:37,307 INFO L175 Difference]: Start difference. First operand has 186 places, 366 transitions, 4532 flow. Second operand 11 states and 1163 transitions. [2023-01-27 22:06:37,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 470 transitions, 6221 flow [2023-01-27 22:06:37,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 470 transitions, 6216 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 22:06:37,391 INFO L231 Difference]: Finished difference. Result has 200 places, 298 transitions, 3944 flow [2023-01-27 22:06:37,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3659, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3944, PETRI_PLACES=200, PETRI_TRANSITIONS=298} [2023-01-27 22:06:37,392 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 170 predicate places. [2023-01-27 22:06:37,392 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 298 transitions, 3944 flow [2023-01-27 22:06:37,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 99.3125) internal successors, (1589), 16 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:37,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:06:37,392 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:06:37,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-27 22:06:37,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-27 22:06:37,593 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:06:37,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:06:37,593 INFO L85 PathProgramCache]: Analyzing trace with hash -826576938, now seen corresponding path program 10 times [2023-01-27 22:06:37,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:06:37,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990863132] [2023-01-27 22:06:37,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:37,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:06:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:37,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:06:37,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990863132] [2023-01-27 22:06:37,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990863132] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:06:37,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745126476] [2023-01-27 22:06:37,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:06:37,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:37,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:06:37,707 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:06:37,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-27 22:06:37,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:06:37,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:06:37,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-27 22:06:37,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:06:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:37,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:06:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:37,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745126476] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:06:37,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:06:37,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 17 [2023-01-27 22:06:37,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755430581] [2023-01-27 22:06:37,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:06:37,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 22:06:37,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:06:37,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 22:06:37,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-01-27 22:06:37,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 273 [2023-01-27 22:06:37,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 298 transitions, 3944 flow. Second operand has 17 states, 17 states have (on average 100.47058823529412) internal successors, (1708), 17 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:37,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:06:37,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 273 [2023-01-27 22:06:37,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:06:38,860 INFO L130 PetriNetUnfolder]: 2231/3931 cut-off events. [2023-01-27 22:06:38,860 INFO L131 PetriNetUnfolder]: For 47227/47254 co-relation queries the response was YES. [2023-01-27 22:06:38,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25351 conditions, 3931 events. 2231/3931 cut-off events. For 47227/47254 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 25646 event pairs, 249 based on Foata normal form. 317/4235 useless extension candidates. Maximal degree in co-relation 25267. Up to 964 conditions per place. [2023-01-27 22:06:38,885 INFO L137 encePairwiseOnDemand]: 264/273 looper letters, 190 selfloop transitions, 89 changer transitions 153/436 dead transitions. [2023-01-27 22:06:38,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 436 transitions, 5975 flow [2023-01-27 22:06:38,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 22:06:38,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 22:06:38,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2300 transitions. [2023-01-27 22:06:38,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.382950382950383 [2023-01-27 22:06:38,888 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2300 transitions. [2023-01-27 22:06:38,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2300 transitions. [2023-01-27 22:06:38,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:06:38,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2300 transitions. [2023-01-27 22:06:38,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 104.54545454545455) internal successors, (2300), 22 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:38,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 273.0) internal successors, (6279), 23 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:38,894 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 273.0) internal successors, (6279), 23 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:38,894 INFO L175 Difference]: Start difference. First operand has 200 places, 298 transitions, 3944 flow. Second operand 22 states and 2300 transitions. [2023-01-27 22:06:38,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 436 transitions, 5975 flow [2023-01-27 22:06:39,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 436 transitions, 5627 flow, removed 79 selfloop flow, removed 14 redundant places. [2023-01-27 22:06:39,003 INFO L231 Difference]: Finished difference. Result has 207 places, 196 transitions, 2500 flow [2023-01-27 22:06:39,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3391, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2500, PETRI_PLACES=207, PETRI_TRANSITIONS=196} [2023-01-27 22:06:39,004 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 177 predicate places. [2023-01-27 22:06:39,004 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 196 transitions, 2500 flow [2023-01-27 22:06:39,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 100.47058823529412) internal successors, (1708), 17 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:39,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:06:39,005 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:06:39,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-27 22:06:39,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-27 22:06:39,205 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:06:39,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:06:39,205 INFO L85 PathProgramCache]: Analyzing trace with hash 858875532, now seen corresponding path program 11 times [2023-01-27 22:06:39,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:06:39,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488203082] [2023-01-27 22:06:39,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:39,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:06:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:39,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:39,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:06:39,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488203082] [2023-01-27 22:06:39,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488203082] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:06:39,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875774713] [2023-01-27 22:06:39,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:06:39,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:39,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:06:39,283 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:06:39,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-27 22:06:39,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:06:39,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:06:39,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 22:06:39,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:06:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:39,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:06:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:39,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875774713] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:06:39,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:06:39,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-01-27 22:06:39,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753591298] [2023-01-27 22:06:39,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:06:39,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 22:06:39,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:06:39,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 22:06:39,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-01-27 22:06:39,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 273 [2023-01-27 22:06:39,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 196 transitions, 2500 flow. Second operand has 15 states, 15 states have (on average 106.33333333333333) internal successors, (1595), 15 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:39,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:06:39,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 273 [2023-01-27 22:06:39,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:06:39,658 INFO L130 PetriNetUnfolder]: 839/1263 cut-off events. [2023-01-27 22:06:39,658 INFO L131 PetriNetUnfolder]: For 14706/14799 co-relation queries the response was YES. [2023-01-27 22:06:39,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9285 conditions, 1263 events. 839/1263 cut-off events. For 14706/14799 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5310 event pairs, 130 based on Foata normal form. 135/1366 useless extension candidates. Maximal degree in co-relation 9217. Up to 678 conditions per place. [2023-01-27 22:06:39,668 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 111 selfloop transitions, 65 changer transitions 0/186 dead transitions. [2023-01-27 22:06:39,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 186 transitions, 2664 flow [2023-01-27 22:06:39,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 22:06:39,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 22:06:39,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 773 transitions. [2023-01-27 22:06:39,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4045002616431188 [2023-01-27 22:06:39,669 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 773 transitions. [2023-01-27 22:06:39,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 773 transitions. [2023-01-27 22:06:39,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:06:39,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 773 transitions. [2023-01-27 22:06:39,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.42857142857143) internal successors, (773), 7 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:39,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:39,671 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:39,671 INFO L175 Difference]: Start difference. First operand has 207 places, 196 transitions, 2500 flow. Second operand 7 states and 773 transitions. [2023-01-27 22:06:39,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 186 transitions, 2664 flow [2023-01-27 22:06:39,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 186 transitions, 2089 flow, removed 168 selfloop flow, removed 34 redundant places. [2023-01-27 22:06:39,697 INFO L231 Difference]: Finished difference. Result has 115 places, 162 transitions, 1699 flow [2023-01-27 22:06:39,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1569, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1699, PETRI_PLACES=115, PETRI_TRANSITIONS=162} [2023-01-27 22:06:39,698 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 85 predicate places. [2023-01-27 22:06:39,698 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 162 transitions, 1699 flow [2023-01-27 22:06:39,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 106.33333333333333) internal successors, (1595), 15 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:39,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:06:39,698 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:06:39,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-01-27 22:06:39,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-27 22:06:39,903 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:06:39,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:06:39,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1834037619, now seen corresponding path program 12 times [2023-01-27 22:06:39,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:06:39,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225046817] [2023-01-27 22:06:39,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:39,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:06:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:40,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:06:40,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225046817] [2023-01-27 22:06:40,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225046817] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:06:40,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295431401] [2023-01-27 22:06:40,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:06:40,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:40,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:06:40,056 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:06:40,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-27 22:06:40,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 22:06:40,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:06:40,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 22:06:40,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:06:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:40,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:06:40,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:40,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295431401] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:06:40,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:06:40,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-01-27 22:06:40,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754405659] [2023-01-27 22:06:40,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:06:40,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 22:06:40,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:06:40,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 22:06:40,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-01-27 22:06:40,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 273 [2023-01-27 22:06:40,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 162 transitions, 1699 flow. Second operand has 21 states, 21 states have (on average 99.14285714285714) internal successors, (2082), 21 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:40,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:06:40,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 273 [2023-01-27 22:06:40,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:06:40,884 INFO L130 PetriNetUnfolder]: 1410/2155 cut-off events. [2023-01-27 22:06:40,884 INFO L131 PetriNetUnfolder]: For 11222/11234 co-relation queries the response was YES. [2023-01-27 22:06:40,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11835 conditions, 2155 events. 1410/2155 cut-off events. For 11222/11234 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 9665 event pairs, 245 based on Foata normal form. 29/2170 useless extension candidates. Maximal degree in co-relation 11795. Up to 1108 conditions per place. [2023-01-27 22:06:40,896 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 242 selfloop transitions, 108 changer transitions 0/360 dead transitions. [2023-01-27 22:06:40,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 360 transitions, 4084 flow [2023-01-27 22:06:40,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 22:06:40,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 22:06:40,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1576 transitions. [2023-01-27 22:06:40,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3848595848595849 [2023-01-27 22:06:40,898 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1576 transitions. [2023-01-27 22:06:40,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1576 transitions. [2023-01-27 22:06:40,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:06:40,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1576 transitions. [2023-01-27 22:06:40,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 105.06666666666666) internal successors, (1576), 15 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:40,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 273.0) internal successors, (4368), 16 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:40,902 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 273.0) internal successors, (4368), 16 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:40,903 INFO L175 Difference]: Start difference. First operand has 115 places, 162 transitions, 1699 flow. Second operand 15 states and 1576 transitions. [2023-01-27 22:06:40,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 360 transitions, 4084 flow [2023-01-27 22:06:40,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 360 transitions, 3854 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-01-27 22:06:40,926 INFO L231 Difference]: Finished difference. Result has 129 places, 234 transitions, 2626 flow [2023-01-27 22:06:40,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1565, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2626, PETRI_PLACES=129, PETRI_TRANSITIONS=234} [2023-01-27 22:06:40,926 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 99 predicate places. [2023-01-27 22:06:40,927 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 234 transitions, 2626 flow [2023-01-27 22:06:40,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 99.14285714285714) internal successors, (2082), 21 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:40,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:06:40,927 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:06:40,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-27 22:06:41,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:41,130 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:06:41,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:06:41,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1735626719, now seen corresponding path program 13 times [2023-01-27 22:06:41,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:06:41,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549208162] [2023-01-27 22:06:41,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:41,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:06:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:41,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:06:41,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549208162] [2023-01-27 22:06:41,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549208162] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:06:41,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169156924] [2023-01-27 22:06:41,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 22:06:41,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:41,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:06:41,226 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:06:41,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-27 22:06:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:41,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 22:06:41,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:06:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:41,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:06:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:41,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169156924] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:06:41,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:06:41,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-01-27 22:06:41,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409172671] [2023-01-27 22:06:41,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:06:41,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 22:06:41,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:06:41,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 22:06:41,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-01-27 22:06:41,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 273 [2023-01-27 22:06:41,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 234 transitions, 2626 flow. Second operand has 18 states, 18 states have (on average 99.11111111111111) internal successors, (1784), 18 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:41,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:06:41,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 273 [2023-01-27 22:06:41,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:06:41,819 INFO L130 PetriNetUnfolder]: 1735/2659 cut-off events. [2023-01-27 22:06:41,819 INFO L131 PetriNetUnfolder]: For 19320/19324 co-relation queries the response was YES. [2023-01-27 22:06:41,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16244 conditions, 2659 events. 1735/2659 cut-off events. For 19320/19324 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 12503 event pairs, 318 based on Foata normal form. 32/2688 useless extension candidates. Maximal degree in co-relation 16198. Up to 1226 conditions per place. [2023-01-27 22:06:41,835 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 253 selfloop transitions, 79 changer transitions 0/341 dead transitions. [2023-01-27 22:06:41,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 341 transitions, 4241 flow [2023-01-27 22:06:41,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 22:06:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 22:06:41,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 941 transitions. [2023-01-27 22:06:41,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.382987382987383 [2023-01-27 22:06:41,836 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 941 transitions. [2023-01-27 22:06:41,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 941 transitions. [2023-01-27 22:06:41,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:06:41,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 941 transitions. [2023-01-27 22:06:41,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 104.55555555555556) internal successors, (941), 9 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:41,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:41,839 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:41,839 INFO L175 Difference]: Start difference. First operand has 129 places, 234 transitions, 2626 flow. Second operand 9 states and 941 transitions. [2023-01-27 22:06:41,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 341 transitions, 4241 flow [2023-01-27 22:06:41,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 341 transitions, 4026 flow, removed 74 selfloop flow, removed 4 redundant places. [2023-01-27 22:06:41,882 INFO L231 Difference]: Finished difference. Result has 137 places, 242 transitions, 2872 flow [2023-01-27 22:06:41,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2410, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2872, PETRI_PLACES=137, PETRI_TRANSITIONS=242} [2023-01-27 22:06:41,883 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 107 predicate places. [2023-01-27 22:06:41,883 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 242 transitions, 2872 flow [2023-01-27 22:06:41,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 99.11111111111111) internal successors, (1784), 18 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:41,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:06:41,883 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:06:41,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-01-27 22:06:42,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-27 22:06:42,088 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:06:42,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:06:42,088 INFO L85 PathProgramCache]: Analyzing trace with hash -408139775, now seen corresponding path program 14 times [2023-01-27 22:06:42,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:06:42,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164945705] [2023-01-27 22:06:42,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:42,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:06:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:42,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:06:42,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164945705] [2023-01-27 22:06:42,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164945705] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:06:42,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237574371] [2023-01-27 22:06:42,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:06:42,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:42,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:06:42,185 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:06:42,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-27 22:06:42,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:06:42,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:06:42,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 22:06:42,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:06:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:42,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:06:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:42,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237574371] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:06:42,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:06:42,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-01-27 22:06:42,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34490579] [2023-01-27 22:06:42,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:06:42,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 22:06:42,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:06:42,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 22:06:42,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2023-01-27 22:06:42,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 273 [2023-01-27 22:06:42,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 242 transitions, 2872 flow. Second operand has 21 states, 21 states have (on average 99.14285714285714) internal successors, (2082), 21 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:42,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:06:42,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 273 [2023-01-27 22:06:42,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:06:43,260 INFO L130 PetriNetUnfolder]: 2498/3791 cut-off events. [2023-01-27 22:06:43,260 INFO L131 PetriNetUnfolder]: For 32432/32444 co-relation queries the response was YES. [2023-01-27 22:06:43,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24540 conditions, 3791 events. 2498/3791 cut-off events. For 32432/32444 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18722 event pairs, 326 based on Foata normal form. 32/3814 useless extension candidates. Maximal degree in co-relation 24490. Up to 1487 conditions per place. [2023-01-27 22:06:43,286 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 282 selfloop transitions, 179 changer transitions 0/470 dead transitions. [2023-01-27 22:06:43,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 470 transitions, 5879 flow [2023-01-27 22:06:43,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 22:06:43,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 22:06:43,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1902 transitions. [2023-01-27 22:06:43,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38705738705738707 [2023-01-27 22:06:43,289 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1902 transitions. [2023-01-27 22:06:43,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1902 transitions. [2023-01-27 22:06:43,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:06:43,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1902 transitions. [2023-01-27 22:06:43,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 105.66666666666667) internal successors, (1902), 18 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:43,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 273.0) internal successors, (5187), 19 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:43,293 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 273.0) internal successors, (5187), 19 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:43,293 INFO L175 Difference]: Start difference. First operand has 137 places, 242 transitions, 2872 flow. Second operand 18 states and 1902 transitions. [2023-01-27 22:06:43,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 470 transitions, 5879 flow [2023-01-27 22:06:43,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 470 transitions, 5664 flow, removed 72 selfloop flow, removed 4 redundant places. [2023-01-27 22:06:43,366 INFO L231 Difference]: Finished difference. Result has 155 places, 296 transitions, 3960 flow [2023-01-27 22:06:43,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2754, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3960, PETRI_PLACES=155, PETRI_TRANSITIONS=296} [2023-01-27 22:06:43,366 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 125 predicate places. [2023-01-27 22:06:43,366 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 296 transitions, 3960 flow [2023-01-27 22:06:43,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 99.14285714285714) internal successors, (2082), 21 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:43,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:06:43,367 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:06:43,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-01-27 22:06:43,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-27 22:06:43,567 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:06:43,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:06:43,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1644877099, now seen corresponding path program 15 times [2023-01-27 22:06:43,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:06:43,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103087132] [2023-01-27 22:06:43,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:43,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:06:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:06:43,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:06:43,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103087132] [2023-01-27 22:06:43,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103087132] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:06:43,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180402268] [2023-01-27 22:06:43,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:06:43,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:43,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:06:43,673 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:06:43,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-27 22:06:43,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 22:06:43,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:06:43,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 22:06:43,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:06:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:06:43,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:06:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:06:43,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180402268] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:06:43,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:06:43,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-01-27 22:06:43,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681188259] [2023-01-27 22:06:43,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:06:43,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 22:06:43,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:06:43,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 22:06:43,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2023-01-27 22:06:43,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 273 [2023-01-27 22:06:43,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 296 transitions, 3960 flow. Second operand has 21 states, 21 states have (on average 99.14285714285714) internal successors, (2082), 21 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:43,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:06:43,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 273 [2023-01-27 22:06:43,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:06:44,620 INFO L130 PetriNetUnfolder]: 2548/3878 cut-off events. [2023-01-27 22:06:44,620 INFO L131 PetriNetUnfolder]: For 38879/38905 co-relation queries the response was YES. [2023-01-27 22:06:44,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26825 conditions, 3878 events. 2548/3878 cut-off events. For 38879/38905 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19365 event pairs, 520 based on Foata normal form. 44/3919 useless extension candidates. Maximal degree in co-relation 26770. Up to 1964 conditions per place. [2023-01-27 22:06:44,647 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 281 selfloop transitions, 126 changer transitions 0/416 dead transitions. [2023-01-27 22:06:44,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 416 transitions, 5984 flow [2023-01-27 22:06:44,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 22:06:44,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 22:06:44,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1053 transitions. [2023-01-27 22:06:44,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2023-01-27 22:06:44,650 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1053 transitions. [2023-01-27 22:06:44,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1053 transitions. [2023-01-27 22:06:44,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:06:44,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1053 transitions. [2023-01-27 22:06:44,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 105.3) internal successors, (1053), 10 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:44,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 273.0) internal successors, (3003), 11 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:44,653 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 273.0) internal successors, (3003), 11 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:44,653 INFO L175 Difference]: Start difference. First operand has 155 places, 296 transitions, 3960 flow. Second operand 10 states and 1053 transitions. [2023-01-27 22:06:44,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 416 transitions, 5984 flow [2023-01-27 22:06:44,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 416 transitions, 5683 flow, removed 100 selfloop flow, removed 8 redundant places. [2023-01-27 22:06:44,749 INFO L231 Difference]: Finished difference. Result has 160 places, 326 transitions, 4533 flow [2023-01-27 22:06:44,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3706, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4533, PETRI_PLACES=160, PETRI_TRANSITIONS=326} [2023-01-27 22:06:44,749 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 130 predicate places. [2023-01-27 22:06:44,749 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 326 transitions, 4533 flow [2023-01-27 22:06:44,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 99.14285714285714) internal successors, (2082), 21 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:44,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:06:44,750 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:06:44,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-27 22:06:44,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:44,950 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:06:44,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:06:44,950 INFO L85 PathProgramCache]: Analyzing trace with hash -975380431, now seen corresponding path program 16 times [2023-01-27 22:06:44,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:06:44,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143028267] [2023-01-27 22:06:44,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:44,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:06:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:06:45,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:06:45,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143028267] [2023-01-27 22:06:45,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143028267] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:06:45,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672076340] [2023-01-27 22:06:45,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:06:45,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:45,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:06:45,055 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:06:45,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-27 22:06:45,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:06:45,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:06:45,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 22:06:45,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:06:45,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:06:45,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:06:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:06:45,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672076340] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:06:45,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:06:45,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-01-27 22:06:45,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569205795] [2023-01-27 22:06:45,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:06:45,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 22:06:45,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:06:45,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 22:06:45,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-01-27 22:06:45,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 273 [2023-01-27 22:06:45,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 326 transitions, 4533 flow. Second operand has 19 states, 19 states have (on average 96.36842105263158) internal successors, (1831), 19 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:45,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:06:45,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 273 [2023-01-27 22:06:45,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:06:46,475 INFO L130 PetriNetUnfolder]: 2642/4011 cut-off events. [2023-01-27 22:06:46,476 INFO L131 PetriNetUnfolder]: For 40575/40575 co-relation queries the response was YES. [2023-01-27 22:06:46,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27928 conditions, 4011 events. 2642/4011 cut-off events. For 40575/40575 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19866 event pairs, 321 based on Foata normal form. 26/4037 useless extension candidates. Maximal degree in co-relation 27869. Up to 1584 conditions per place. [2023-01-27 22:06:46,505 INFO L137 encePairwiseOnDemand]: 263/273 looper letters, 353 selfloop transitions, 244 changer transitions 0/597 dead transitions. [2023-01-27 22:06:46,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 597 transitions, 8564 flow [2023-01-27 22:06:46,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-27 22:06:46,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-27 22:06:46,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3119 transitions. [2023-01-27 22:06:46,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36854543306156207 [2023-01-27 22:06:46,509 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3119 transitions. [2023-01-27 22:06:46,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3119 transitions. [2023-01-27 22:06:46,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:06:46,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3119 transitions. [2023-01-27 22:06:46,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 100.61290322580645) internal successors, (3119), 31 states have internal predecessors, (3119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:46,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 273.0) internal successors, (8736), 32 states have internal predecessors, (8736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:46,519 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 273.0) internal successors, (8736), 32 states have internal predecessors, (8736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:46,519 INFO L175 Difference]: Start difference. First operand has 160 places, 326 transitions, 4533 flow. Second operand 31 states and 3119 transitions. [2023-01-27 22:06:46,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 597 transitions, 8564 flow [2023-01-27 22:06:46,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 597 transitions, 8395 flow, removed 77 selfloop flow, removed 4 redundant places. [2023-01-27 22:06:46,631 INFO L231 Difference]: Finished difference. Result has 191 places, 408 transitions, 6026 flow [2023-01-27 22:06:46,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=4423, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=6026, PETRI_PLACES=191, PETRI_TRANSITIONS=408} [2023-01-27 22:06:46,631 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 161 predicate places. [2023-01-27 22:06:46,631 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 408 transitions, 6026 flow [2023-01-27 22:06:46,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 96.36842105263158) internal successors, (1831), 19 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:46,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:06:46,631 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:06:46,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-27 22:06:46,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:46,832 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:06:46,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:06:46,832 INFO L85 PathProgramCache]: Analyzing trace with hash 561744499, now seen corresponding path program 17 times [2023-01-27 22:06:46,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:06:46,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630479584] [2023-01-27 22:06:46,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:46,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:06:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:06:46,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:06:46,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630479584] [2023-01-27 22:06:46,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630479584] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:06:46,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256821660] [2023-01-27 22:06:46,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:06:46,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:46,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:06:46,917 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:06:46,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-27 22:06:47,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:06:47,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:06:47,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 22:06:47,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:06:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:06:47,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:06:47,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:06:47,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256821660] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:06:47,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:06:47,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2023-01-27 22:06:47,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976045809] [2023-01-27 22:06:47,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:06:47,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 22:06:47,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:06:47,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 22:06:47,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-01-27 22:06:47,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 273 [2023-01-27 22:06:47,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 408 transitions, 6026 flow. Second operand has 17 states, 17 states have (on average 96.70588235294117) internal successors, (1644), 17 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:47,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:06:47,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 273 [2023-01-27 22:06:47,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:06:48,035 INFO L130 PetriNetUnfolder]: 2608/3945 cut-off events. [2023-01-27 22:06:48,035 INFO L131 PetriNetUnfolder]: For 43084/43084 co-relation queries the response was YES. [2023-01-27 22:06:48,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28677 conditions, 3945 events. 2608/3945 cut-off events. For 43084/43084 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 19312 event pairs, 345 based on Foata normal form. 26/3971 useless extension candidates. Maximal degree in co-relation 28614. Up to 1634 conditions per place. [2023-01-27 22:06:48,067 INFO L137 encePairwiseOnDemand]: 263/273 looper letters, 354 selfloop transitions, 203 changer transitions 0/557 dead transitions. [2023-01-27 22:06:48,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 557 transitions, 8646 flow [2023-01-27 22:06:48,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 22:06:48,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 22:06:48,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1920 transitions. [2023-01-27 22:06:48,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37015615962984383 [2023-01-27 22:06:48,069 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1920 transitions. [2023-01-27 22:06:48,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1920 transitions. [2023-01-27 22:06:48,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:06:48,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1920 transitions. [2023-01-27 22:06:48,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 101.05263157894737) internal successors, (1920), 19 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:48,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 273.0) internal successors, (5460), 20 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:48,073 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 273.0) internal successors, (5460), 20 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:48,073 INFO L175 Difference]: Start difference. First operand has 191 places, 408 transitions, 6026 flow. Second operand 19 states and 1920 transitions. [2023-01-27 22:06:48,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 557 transitions, 8646 flow [2023-01-27 22:06:48,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 557 transitions, 8182 flow, removed 110 selfloop flow, removed 8 redundant places. [2023-01-27 22:06:48,215 INFO L231 Difference]: Finished difference. Result has 204 places, 413 transitions, 6026 flow [2023-01-27 22:06:48,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=5467, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6026, PETRI_PLACES=204, PETRI_TRANSITIONS=413} [2023-01-27 22:06:48,216 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 174 predicate places. [2023-01-27 22:06:48,216 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 413 transitions, 6026 flow [2023-01-27 22:06:48,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 96.70588235294117) internal successors, (1644), 17 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:48,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:06:48,216 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:06:48,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-27 22:06:48,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:48,417 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:06:48,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:06:48,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1034602387, now seen corresponding path program 18 times [2023-01-27 22:06:48,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:06:48,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472700897] [2023-01-27 22:06:48,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:48,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:06:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:48,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:06:48,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472700897] [2023-01-27 22:06:48,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472700897] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:06:48,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504013417] [2023-01-27 22:06:48,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:06:48,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:48,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:06:48,499 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:06:48,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-27 22:06:48,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 22:06:48,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:06:48,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 22:06:48,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:06:48,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:48,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:06:48,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:06:48,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504013417] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:06:48,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:06:48,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-01-27 22:06:48,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469182123] [2023-01-27 22:06:48,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:06:48,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 22:06:48,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:06:48,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 22:06:48,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-01-27 22:06:48,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 273 [2023-01-27 22:06:48,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 413 transitions, 6026 flow. Second operand has 21 states, 21 states have (on average 99.14285714285714) internal successors, (2082), 21 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:48,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:06:48,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 273 [2023-01-27 22:06:48,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:06:49,538 INFO L130 PetriNetUnfolder]: 2549/3864 cut-off events. [2023-01-27 22:06:49,538 INFO L131 PetriNetUnfolder]: For 42182/42195 co-relation queries the response was YES. [2023-01-27 22:06:49,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28278 conditions, 3864 events. 2549/3864 cut-off events. For 42182/42195 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 19122 event pairs, 342 based on Foata normal form. 52/3907 useless extension candidates. Maximal degree in co-relation 28212. Up to 1565 conditions per place. [2023-01-27 22:06:49,570 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 294 selfloop transitions, 229 changer transitions 0/547 dead transitions. [2023-01-27 22:06:49,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 547 transitions, 8188 flow [2023-01-27 22:06:49,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 22:06:49,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 22:06:49,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1592 transitions. [2023-01-27 22:06:49,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3887667887667888 [2023-01-27 22:06:49,572 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1592 transitions. [2023-01-27 22:06:49,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1592 transitions. [2023-01-27 22:06:49,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:06:49,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1592 transitions. [2023-01-27 22:06:49,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 106.13333333333334) internal successors, (1592), 15 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:49,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 273.0) internal successors, (4368), 16 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:49,576 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 273.0) internal successors, (4368), 16 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:49,576 INFO L175 Difference]: Start difference. First operand has 204 places, 413 transitions, 6026 flow. Second operand 15 states and 1592 transitions. [2023-01-27 22:06:49,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 547 transitions, 8188 flow [2023-01-27 22:06:49,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 547 transitions, 7947 flow, removed 9 selfloop flow, removed 12 redundant places. [2023-01-27 22:06:49,706 INFO L231 Difference]: Finished difference. Result has 206 places, 420 transitions, 6404 flow [2023-01-27 22:06:49,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=5793, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6404, PETRI_PLACES=206, PETRI_TRANSITIONS=420} [2023-01-27 22:06:49,706 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 176 predicate places. [2023-01-27 22:06:49,706 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 420 transitions, 6404 flow [2023-01-27 22:06:49,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 99.14285714285714) internal successors, (2082), 21 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:49,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:06:49,707 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:06:49,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-27 22:06:49,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-01-27 22:06:49,911 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:06:49,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:06:49,912 INFO L85 PathProgramCache]: Analyzing trace with hash 849317859, now seen corresponding path program 19 times [2023-01-27 22:06:49,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:06:49,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314585239] [2023-01-27 22:06:49,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:49,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:06:49,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:50,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:06:50,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:06:50,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314585239] [2023-01-27 22:06:50,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314585239] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:06:50,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093235464] [2023-01-27 22:06:50,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 22:06:50,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:50,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:06:50,005 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:06:50,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-27 22:06:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:50,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 22:06:50,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:06:50,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:06:50,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:06:50,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:06:50,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093235464] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:06:50,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:06:50,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-01-27 22:06:50,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287039304] [2023-01-27 22:06:50,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:06:50,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 22:06:50,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:06:50,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 22:06:50,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-01-27 22:06:50,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 273 [2023-01-27 22:06:50,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 420 transitions, 6404 flow. Second operand has 20 states, 20 states have (on average 99.0) internal successors, (1980), 20 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:50,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:06:50,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 273 [2023-01-27 22:06:50,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:06:50,918 INFO L130 PetriNetUnfolder]: 2519/3804 cut-off events. [2023-01-27 22:06:50,918 INFO L131 PetriNetUnfolder]: For 45361/45372 co-relation queries the response was YES. [2023-01-27 22:06:50,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28647 conditions, 3804 events. 2519/3804 cut-off events. For 45361/45372 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 18595 event pairs, 406 based on Foata normal form. 26/3821 useless extension candidates. Maximal degree in co-relation 28580. Up to 1553 conditions per place. [2023-01-27 22:06:50,950 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 267 selfloop transitions, 182 changer transitions 0/473 dead transitions. [2023-01-27 22:06:50,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 473 transitions, 7759 flow [2023-01-27 22:06:50,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 22:06:50,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 22:06:50,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 940 transitions. [2023-01-27 22:06:50,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38258038258038257 [2023-01-27 22:06:50,951 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 940 transitions. [2023-01-27 22:06:50,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 940 transitions. [2023-01-27 22:06:50,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:06:50,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 940 transitions. [2023-01-27 22:06:50,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 104.44444444444444) internal successors, (940), 9 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:50,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:50,954 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:50,954 INFO L175 Difference]: Start difference. First operand has 206 places, 420 transitions, 6404 flow. Second operand 9 states and 940 transitions. [2023-01-27 22:06:50,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 473 transitions, 7759 flow [2023-01-27 22:06:51,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 473 transitions, 7262 flow, removed 8 selfloop flow, removed 13 redundant places. [2023-01-27 22:06:51,085 INFO L231 Difference]: Finished difference. Result has 201 places, 422 transitions, 6478 flow [2023-01-27 22:06:51,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=5892, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6478, PETRI_PLACES=201, PETRI_TRANSITIONS=422} [2023-01-27 22:06:51,085 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 171 predicate places. [2023-01-27 22:06:51,086 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 422 transitions, 6478 flow [2023-01-27 22:06:51,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 99.0) internal successors, (1980), 20 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:51,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:06:51,086 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:06:51,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-27 22:06:51,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-01-27 22:06:51,286 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:06:51,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:06:51,287 INFO L85 PathProgramCache]: Analyzing trace with hash 103220131, now seen corresponding path program 20 times [2023-01-27 22:06:51,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:06:51,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090276486] [2023-01-27 22:06:51,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:51,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:06:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:06:51,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:06:51,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090276486] [2023-01-27 22:06:51,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090276486] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:06:51,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221916715] [2023-01-27 22:06:51,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:06:51,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:51,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:06:51,402 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:06:51,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-27 22:06:51,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:06:51,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:06:51,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 22:06:51,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:06:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:06:51,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:06:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:06:51,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221916715] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:06:51,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:06:51,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-01-27 22:06:51,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597068716] [2023-01-27 22:06:51,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:06:51,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 22:06:51,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:06:51,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 22:06:51,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-01-27 22:06:51,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 273 [2023-01-27 22:06:51,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 422 transitions, 6478 flow. Second operand has 20 states, 20 states have (on average 99.0) internal successors, (1980), 20 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:51,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:06:51,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 273 [2023-01-27 22:06:51,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:06:52,333 INFO L130 PetriNetUnfolder]: 2488/3741 cut-off events. [2023-01-27 22:06:52,334 INFO L131 PetriNetUnfolder]: For 47088/47095 co-relation queries the response was YES. [2023-01-27 22:06:52,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28605 conditions, 3741 events. 2488/3741 cut-off events. For 47088/47095 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 18057 event pairs, 729 based on Foata normal form. 30/3762 useless extension candidates. Maximal degree in co-relation 28538. Up to 2986 conditions per place. [2023-01-27 22:06:52,365 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 342 selfloop transitions, 96 changer transitions 0/462 dead transitions. [2023-01-27 22:06:52,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 462 transitions, 7628 flow [2023-01-27 22:06:52,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 22:06:52,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 22:06:52,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 934 transitions. [2023-01-27 22:06:52,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38013838013838014 [2023-01-27 22:06:52,366 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 934 transitions. [2023-01-27 22:06:52,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 934 transitions. [2023-01-27 22:06:52,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:06:52,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 934 transitions. [2023-01-27 22:06:52,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 103.77777777777777) internal successors, (934), 9 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:52,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:52,369 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:52,369 INFO L175 Difference]: Start difference. First operand has 201 places, 422 transitions, 6478 flow. Second operand 9 states and 934 transitions. [2023-01-27 22:06:52,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 462 transitions, 7628 flow [2023-01-27 22:06:52,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 462 transitions, 7404 flow, removed 24 selfloop flow, removed 7 redundant places. [2023-01-27 22:06:52,520 INFO L231 Difference]: Finished difference. Result has 202 places, 422 transitions, 6444 flow [2023-01-27 22:06:52,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=6149, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6444, PETRI_PLACES=202, PETRI_TRANSITIONS=422} [2023-01-27 22:06:52,520 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 172 predicate places. [2023-01-27 22:06:52,521 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 422 transitions, 6444 flow [2023-01-27 22:06:52,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 99.0) internal successors, (1980), 20 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:06:52,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:06:52,521 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:06:52,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-27 22:06:52,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:52,723 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:06:52,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:06:52,723 INFO L85 PathProgramCache]: Analyzing trace with hash 108858239, now seen corresponding path program 2 times [2023-01-27 22:06:52,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:06:52,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304284415] [2023-01-27 22:06:52,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:06:52,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:06:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:06:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:53,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:06:53,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304284415] [2023-01-27 22:06:53,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304284415] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:06:53,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793348407] [2023-01-27 22:06:53,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:06:53,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:06:53,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:06:53,725 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:06:53,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-27 22:06:53,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:06:53,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:06:53,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 50 conjunts are in the unsatisfiable core [2023-01-27 22:06:53,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:06:54,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:06:54,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-01-27 22:06:54,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:06:54,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-01-27 22:06:54,682 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 22:06:54,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:06:54,685 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:06:54,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 76 [2023-01-27 22:06:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:06:54,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:06:55,373 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~M~0 0) (let ((.cse5 (+ c_~A~0.offset (* 4 c_~M~0))) (.cse4 (+ c_~A~0.offset (* c_thread1Thread1of1ForFork1_~i~0 4)))) (and (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse0 (select .cse3 .cse5)) (.cse2 (select .cse3 .cse4)) (.cse1 (select .cse3 c_~A~0.offset))) (or (<= .cse0 .cse1) (= .cse2 .cse0) (<= .cse2 c_~max1~0) (<= .cse1 c_~max2~0))))) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse7 (select .cse8 .cse5)) (.cse6 (select .cse8 .cse4))) (or (= .cse6 .cse7) (<= .cse7 c_~max2~0) (< c_~max2~0 (select .cse8 c_~A~0.offset)) (<= .cse6 c_~max1~0))))) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse10 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse9 (select .cse10 c_~A~0.offset))) (or (= c_~max1~0 .cse9) (< .cse9 (select .cse10 .cse5)) (< c_~max1~0 (select .cse10 .cse4)) (<= .cse9 c_~max2~0))))) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse12 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse13 (select .cse12 .cse4)) (.cse11 (select .cse12 c_~A~0.offset))) (or (< .cse11 (select .cse12 .cse5)) (= .cse13 .cse11) (<= .cse13 c_~max1~0) (<= .cse11 c_~max2~0))))) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse14 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse15 (select .cse14 .cse4))) (or (< c_~max2~0 (select .cse14 .cse5)) (< c_~max2~0 (select .cse14 c_~A~0.offset)) (= .cse15 c_~max2~0) (<= .cse15 c_~max1~0))))) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse17 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse16 (select .cse17 .cse5))) (or (<= .cse16 c_~max2~0) (< c_~max2~0 (select .cse17 c_~A~0.offset)) (< c_~max1~0 (select .cse17 .cse4)) (= c_~max1~0 .cse16))))) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse20 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse19 (select .cse20 c_~A~0.offset)) (.cse18 (select .cse20 .cse5))) (or (<= .cse18 .cse19) (< c_~max1~0 (select .cse20 .cse4)) (<= .cse19 c_~max2~0) (= c_~max1~0 .cse18))))) (or (= c_~max1~0 c_~max2~0) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse21 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (or (< c_~max2~0 (select .cse21 .cse5)) (< c_~max2~0 (select .cse21 c_~A~0.offset)) (< c_~max1~0 (select .cse21 .cse4))))))))) is different from false [2023-01-27 22:06:55,576 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~M~0 0) (let ((.cse4 (+ c_~A~0.offset (* c_thread1Thread1of1ForFork1_~i~0 4))) (.cse5 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse1 (select .cse3 c_~A~0.offset)) (.cse0 (select .cse3 .cse5)) (.cse2 (select .cse3 .cse4))) (or (<= .cse0 .cse1) (<= .cse1 c_~max2~0) (= .cse0 .cse2) (<= .cse2 c_~max1~0))))) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse8 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse7 (select .cse8 c_~A~0.offset)) (.cse6 (select .cse8 .cse5))) (or (<= .cse6 .cse7) (<= .cse7 c_~max2~0) (= c_~max1~0 .cse6) (< c_~max1~0 (select .cse8 .cse4)))))) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse11 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse9 (select .cse11 c_~A~0.offset)) (.cse10 (select .cse11 .cse4))) (or (= .cse9 .cse10) (<= .cse9 c_~max2~0) (< .cse9 (select .cse11 .cse5)) (<= .cse10 c_~max1~0))))) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse12 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse13 (select .cse12 .cse4))) (or (< c_~max2~0 (select .cse12 c_~A~0.offset)) (< c_~max2~0 (select .cse12 .cse5)) (<= .cse13 c_~max1~0) (= c_~max2~0 .cse13))))) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse15 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse14 (select .cse15 c_~A~0.offset))) (or (<= .cse14 c_~max2~0) (= c_~max1~0 .cse14) (< .cse14 (select .cse15 .cse5)) (< c_~max1~0 (select .cse15 .cse4)))))) (or (= c_~max1~0 c_~max2~0) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse16 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (or (< c_~max2~0 (select .cse16 c_~A~0.offset)) (< c_~max2~0 (select .cse16 .cse5)) (< c_~max1~0 (select .cse16 .cse4)))))) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse17 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse19 (select .cse17 .cse4)) (.cse18 (select .cse17 .cse5))) (or (< c_~max2~0 (select .cse17 c_~A~0.offset)) (= .cse18 .cse19) (<= .cse19 c_~max1~0) (<= .cse18 c_~max2~0))))) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse21 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse20 (select .cse21 .cse5))) (or (= c_~max1~0 .cse20) (< c_~max2~0 (select .cse21 c_~A~0.offset)) (<= .cse20 c_~max2~0) (< c_~max1~0 (select .cse21 .cse4))))))))) is different from false [2023-01-27 22:06:55,691 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-27 22:06:55,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3307 treesize of output 2934 [2023-01-27 22:06:55,790 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-27 22:06:55,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1835 treesize of output 1826 [2023-01-27 22:06:55,844 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-27 22:06:55,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1805 treesize of output 1766 [2023-01-27 22:06:55,912 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-27 22:06:55,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1745 treesize of output 1714 [2023-01-27 22:06:55,988 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-27 22:06:55,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1693 treesize of output 1688 [2023-01-27 22:06:56,057 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-27 22:06:56,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1667 treesize of output 1665 [2023-01-27 22:06:56,127 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-27 22:06:56,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1644 treesize of output 1619 [2023-01-27 22:06:56,195 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-27 22:06:56,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1598 treesize of output 1604 [2023-01-27 22:06:56,266 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-27 22:06:56,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1583 treesize of output 1574 [2023-01-27 22:06:56,301 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-27 22:06:56,340 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-27 22:06:56,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1553 treesize of output 1518 [2023-01-27 22:06:56,418 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-27 22:06:56,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1497 treesize of output 1490 [2023-01-27 22:06:56,502 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-27 22:06:56,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1469 treesize of output 1471 [2023-01-27 22:06:56,585 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-27 22:06:56,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1450 treesize of output 1433 [2023-01-27 22:06:56,680 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-27 22:06:56,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1412 treesize of output 1391 [2023-01-27 22:06:56,771 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-27 22:06:56,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1370 treesize of output 1370 [2023-01-27 22:06:56,860 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-27 22:06:56,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1349 treesize of output 1326 [2023-01-27 22:06:56,951 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-01-27 22:06:56,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1305 treesize of output 1304 [2023-01-27 22:09:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:09:40,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793348407] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:09:40,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:09:40,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 37 [2023-01-27 22:09:40,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924038229] [2023-01-27 22:09:40,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:09:40,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-27 22:09:40,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:09:40,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-27 22:09:40,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1207, Unknown=2, NotChecked=142, Total=1482 [2023-01-27 22:09:40,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 273 [2023-01-27 22:09:40,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 422 transitions, 6444 flow. Second operand has 39 states, 39 states have (on average 70.7948717948718) internal successors, (2761), 39 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:09:40,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:09:40,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 273 [2023-01-27 22:09:40,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:09:58,932 INFO L130 PetriNetUnfolder]: 6074/9547 cut-off events. [2023-01-27 22:09:58,933 INFO L131 PetriNetUnfolder]: For 133966/133966 co-relation queries the response was YES. [2023-01-27 22:09:58,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72841 conditions, 9547 events. 6074/9547 cut-off events. For 133966/133966 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 59367 event pairs, 297 based on Foata normal form. 10/9557 useless extension candidates. Maximal degree in co-relation 72774. Up to 4884 conditions per place. [2023-01-27 22:09:59,012 INFO L137 encePairwiseOnDemand]: 256/273 looper letters, 767 selfloop transitions, 661 changer transitions 18/1446 dead transitions. [2023-01-27 22:09:59,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 1446 transitions, 22528 flow [2023-01-27 22:09:59,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-01-27 22:09:59,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-01-27 22:09:59,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 5102 transitions. [2023-01-27 22:09:59,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2875176105945337 [2023-01-27 22:09:59,018 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 5102 transitions. [2023-01-27 22:09:59,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 5102 transitions. [2023-01-27 22:09:59,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:09:59,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 5102 transitions. [2023-01-27 22:09:59,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 78.49230769230769) internal successors, (5102), 65 states have internal predecessors, (5102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:09:59,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 273.0) internal successors, (18018), 66 states have internal predecessors, (18018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:09:59,033 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 273.0) internal successors, (18018), 66 states have internal predecessors, (18018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:09:59,033 INFO L175 Difference]: Start difference. First operand has 202 places, 422 transitions, 6444 flow. Second operand 65 states and 5102 transitions. [2023-01-27 22:09:59,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 1446 transitions, 22528 flow [2023-01-27 22:09:59,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 1446 transitions, 21758 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-01-27 22:09:59,806 INFO L231 Difference]: Finished difference. Result has 286 places, 1008 transitions, 18203 flow [2023-01-27 22:09:59,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=6267, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=18203, PETRI_PLACES=286, PETRI_TRANSITIONS=1008} [2023-01-27 22:09:59,807 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 256 predicate places. [2023-01-27 22:09:59,807 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 1008 transitions, 18203 flow [2023-01-27 22:09:59,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 70.7948717948718) internal successors, (2761), 39 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:09:59,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:09:59,808 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:09:59,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-27 22:10:00,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:10:00,009 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 22:10:00,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:10:00,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1055356433, now seen corresponding path program 3 times [2023-01-27 22:10:00,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:10:00,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832857468] [2023-01-27 22:10:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:10:00,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:10:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:10:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:10:00,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:10:00,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832857468] [2023-01-27 22:10:00,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832857468] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:10:00,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340239260] [2023-01-27 22:10:00,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:10:00,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:10:00,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:10:00,967 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:10:00,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-27 22:10:01,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 22:10:01,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:10:01,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 22:10:01,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:10:01,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:10:01,665 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:10:01,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 81 [2023-01-27 22:10:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:10:01,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:10:03,619 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:10:03,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 371 treesize of output 607 [2023-01-27 22:11:48,559 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-01-27 22:12:12,444 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-01-27 22:13:22,755 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-01-27 22:15:05,677 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-01-27 22:16:32,583 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-01-27 22:17:06,435 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-01-27 22:18:11,870 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. Received shutdown request... [2023-01-27 22:20:01,361 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 22:20:01,393 WARN L238 SmtUtils]: Removed 2 from assertion stack [2023-01-27 22:20:01,394 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-01-27 22:20:01,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-01-27 22:20:01,408 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 22:20:01,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-27 22:20:01,595 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 23ms.. [2023-01-27 22:20:01,596 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-01-27 22:20:01,596 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-01-27 22:20:01,596 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-01-27 22:20:01,597 INFO L445 BasicCegarLoop]: Path program histogram: [20, 3, 1, 1, 1] [2023-01-27 22:20:01,599 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 22:20:01,599 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 22:20:01,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 10:20:01 BasicIcfg [2023-01-27 22:20:01,600 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 22:20:01,601 INFO L158 Benchmark]: Toolchain (without parser) took 837522.74ms. Allocated memory was 354.4MB in the beginning and 1.3GB in the end (delta: 924.8MB). Free memory was 325.3MB in the beginning and 816.0MB in the end (delta: -490.8MB). Peak memory consumption was 927.8MB. Max. memory is 16.0GB. [2023-01-27 22:20:01,601 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 255.9MB. Free memory is still 213.3MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 22:20:01,601 INFO L158 Benchmark]: CACSL2BoogieTranslator took 219.86ms. Allocated memory is still 354.4MB. Free memory was 324.8MB in the beginning and 313.3MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-27 22:20:01,601 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.04ms. Allocated memory is still 354.4MB. Free memory was 313.3MB in the beginning and 311.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 22:20:01,601 INFO L158 Benchmark]: Boogie Preprocessor took 30.97ms. Allocated memory is still 354.4MB. Free memory was 311.7MB in the beginning and 310.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 22:20:01,601 INFO L158 Benchmark]: RCFGBuilder took 454.49ms. Allocated memory is still 354.4MB. Free memory was 310.1MB in the beginning and 289.2MB in the end (delta: 20.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-01-27 22:20:01,602 INFO L158 Benchmark]: TraceAbstraction took 836775.82ms. Allocated memory was 354.4MB in the beginning and 1.3GB in the end (delta: 924.8MB). Free memory was 288.1MB in the beginning and 816.0MB in the end (delta: -527.9MB). Peak memory consumption was 890.0MB. Max. memory is 16.0GB. [2023-01-27 22:20:01,602 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 255.9MB. Free memory is still 213.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 219.86ms. Allocated memory is still 354.4MB. Free memory was 324.8MB in the beginning and 313.3MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 36.04ms. Allocated memory is still 354.4MB. Free memory was 313.3MB in the beginning and 311.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 30.97ms. Allocated memory is still 354.4MB. Free memory was 311.7MB in the beginning and 310.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 454.49ms. Allocated memory is still 354.4MB. Free memory was 310.1MB in the beginning and 289.2MB in the end (delta: 20.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 836775.82ms. Allocated memory was 354.4MB in the beginning and 1.3GB in the end (delta: 924.8MB). Free memory was 288.1MB in the beginning and 816.0MB in the end (delta: -527.9MB). Peak memory consumption was 890.0MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.7s, 129 PlacesBefore, 30 PlacesAfterwards, 131 TransitionsBefore, 24 TransitionsAfterwards, 1320 CoEnabledTransitionPairs, 8 FixpointIterations, 73 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 15 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 129 TotalNumberOfCompositions, 1615 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1511, independent: 1489, independent conditional: 0, independent unconditional: 1489, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 724, independent: 714, independent conditional: 0, independent unconditional: 714, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1511, independent: 775, independent conditional: 0, independent unconditional: 775, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 724, unknown conditional: 0, unknown unconditional: 724] , Statistics on independence cache: Total cache size (in pairs): 53, Positive cache size: 51, Positive conditional cache size: 0, Positive unconditional cache size: 51, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 23ms.. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 23ms.. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 23ms.. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 23ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 163 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 836.7s, OverallIterations: 26, TraceHistogramMax: 2, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 43.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4255 SdHoareTripleChecker+Valid, 8.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4255 mSDsluCounter, 753 SdHoareTripleChecker+Invalid, 7.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1521 IncrementalHoareTripleChecker+Unchecked, 654 mSDsCounter, 181 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15517 IncrementalHoareTripleChecker+Invalid, 17219 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 181 mSolverCounterUnsat, 99 mSDtfsCounter, 15517 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1562 GetRequests, 799 SyntacticMatches, 39 SemanticMatches, 724 ConstructedPredicates, 4 IntricatePredicates, 2 DeprecatedPredicates, 6616 ImplicationChecksByTransitivity, 28.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18203occurred in iteration=25, InterpolantAutomatonStates: 404, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 180.1s InterpolantComputationTime, 1147 NumberOfCodeBlocks, 1136 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 1629 ConstructedInterpolants, 13 QuantifiedInterpolants, 18573 SizeOfPredicates, 257 NumberOfNonLiveVariables, 4916 ConjunctsInSsa, 437 ConjunctsInUnsatCore, 71 InterpolantComputations, 3 PerfectInterpolantSequences, 147/349 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown